Food Safety: Foodborne Illnesses and Germs

What Causes Food Poisoning?

Many different disease-causing germs can contaminate foods, so there are many different foodborne infections.

CDC estimates that each year 48 million people get sick from a foodborne illness, 128,000 are hospitalized, and 3,000 die.

  • Researchers have identified more than 250 foodborne diseases.

  • Most of them are infections, caused by a variety of bacteria, viruses, and parasites.

  • Harmful toxins and chemicals also can contaminate foods and cause foodborne illness.

Do I Have Food Poisoning?

Elderly lady in hospital bed high risk for food poisoning

Common symptoms  of foodborne diseases are nausea, vomiting, stomach cramps, and diarrhea. However, symptoms may differ among the different types of foodborne diseases. Symptoms can sometimes be severe and some foodborne illnesses can even be life-threatening. Although anyone can get a foodborne illness, some people are more likely to develop one. Those groups include:

  • Pregnant women

  • Young children

  • Older adults

  • People with immune systems weakened from medical conditions, such as diabetes, liver disease, kidney disease, organ transplants, HIV/AIDS, or from receiving chemotherapy or radiation treatment.

Most people with a foodborne illness get better without medical treatment, but people with severe symptoms should see their doctor.

Some Common Foodborne Germs

Illustration of c. perfringens

Clostridium perfringens

The top five germs that cause illnesses from food eaten in the United States are:

Some other germs don’t cause as many illnesses, but when they do, the illnesses are more likely to lead to hospitalization. Those germs include:

Graphical illustration of ecoli

E. coli

See a complete A-Z index of foodborne germs >>

Food Safety Tips

4 steps to food safety - clean, separate, cook, chill

Anyone can get sick from eating contaminated food. Learn the four simple food safety steps – clean, separate, cook, and chill – to lower your chance of food poisoning and to protect yourself and your loved ones.

Food Poisoning Symptoms

Report Food Poisoning

If you believe you or someone you know got sick from food, even if you don’t know what food it was, please report it to your local health department. Reporting your illness may help public health officials identify a foodborne disease outbreak and keep others from getting sick.

Food poisoning symptoms may range from mild to severe and may differ depending on the germ you swallowed. The most common symptoms of food poisoning are:

  • Upset stomach

  • Stomach cramps

  • Nausea

  • Vomiting

  • Diarrhea

  • Fever

After you consume a contaminated food or drink, it may take hours or days before you develop symptoms.

Complications From Food Poisoning

Most people have only mild illnesses, lasting a few hours to several days. However, some people need to be hospitalized, and some illnesses result in long-term health problems or even death. Infections transmitted by food can result in chronic arthritis, brain and nerve damage, and hemolytic uremic syndrome (HUS), which causes kidney failure.

When to See a Doctor for Food Poisoning

If you experience symptoms of food poisoning, such as diarrhea or vomiting, drink plenty of fluids to prevent dehydration.

See your doctor or healthcare provider if you have symptoms that are severe, including:

  • High fever (temperature over 101.5°F, measured orally)

  • Blood in stools

  • Frequent vomiting that prevents keeping liquids down (which can lead to dehydration)

  • Signs of dehydration, including a marked decrease in urination, a very dry mouth and throat, or feeling dizzy when standing up.

  • Diarrhea that lasts more than 3 days

Symptoms and Sources of 10 Foodborne Germs

Germ and Typical Time for Symptoms to Appear

Typical Signs and Symptoms 

Common Food Sources

Campylobacter
2 – 5 days

Diarrhea (often bloody), stomach cramps/pain, fever

Raw or undercooked poultryraw (unpasteurized) milk, and contaminated water

Clostridium botulinum (Botulism)
18 – 36 hours

Double or blurred vision, drooping eyelids, slurred speech. Difficulty swallowing, breathing and dry mouth. Muscle weakness and paralysis. Symptoms start in the head and move down as severity increases

Improperly canned or fermented foods, usually homemade. Prison-made illicit alcohol.

Clostridium perfringens
6 – 24 hours

Diarrhea, stomach cramps. Vomiting and fever are uncommon. Usually begins suddenly and lasts for less than 24 hours

Beef or poultry, especially large roasts; gravies; dried or precooked foods

Cyclospora
1 week

Watery diarrhea, loss of appetite and weight loss. Stomach cramps/pain, bloating, increased gas, nausea, and fatigue.

Raw fruits or vegetables, and herbs

Escherichia coli (E. coli)
3 – 4 days

Severe stomach cramps, diarrhea (often bloody), and vomiting. Around 5-10% of people diagnosed with this infection develop a life-threatening complication.

Raw or undercooked ground beef, raw (unpasteurized) milk and juice, raw vegetables (such as lettuce), and raw sprouts, contaminated water

Listeria
1 – 4 weeks

Pregnant women typically experience fever and other flu-like symptoms, such as fatigue and muscle aches. Infections during pregnancy can lead to serious illness or even death in newborns.
Other people (most often older adults): headache, stiff neck, confusion, loss of balance and convulsions in addition to fever and muscle aches.

Queso fresco and other soft cheeses, raw sprouts, melons, hotdogs, pâtés, deli meats, smoked seafood, and raw (unpasteurized) milk.

Norovirus
12 – 48 hours

Diarrhea, nausea/stomach pain, vomiting

Infected person, contaminated food like leafy greens, fresh fruitsshellfish (such as oysters), or water, or by touching contaminated surfaces

Salmonella
12 – 72 hours

Diarrhea, fever, stomach cramps, vomiting

Eggs, raw or undercooked poultry or meat, unpasteurized milk or juice, cheese, raw fruits and vegetables

Staphylococcus aureus (Staph)
30 minutes – 6 hours

Nausea, vomiting, and stomach cramps. Most people also have diarrhea.

Foods that are not cooked after handling, such as sliced meats, puddings, pastries, and sandwiches.

Vibrio
1 – 4 days

Watery diarrhea, nausea. stomach cramps, vomiting, fever, chills

Raw or undercooked shellfish, particularly oysters

Learn more about how to prevent food poisoning >

Preventing Food Poisoning

What Is Food Poisoning?

Foodborne illness (sometimes called foodborne disease, foodborne infection, or food poisoning) is common, costly – and preventable. CDC estimates that 1 in 6 Americans get sick from eating contaminated food every year.

You can get food poisoning after swallowing food that has been contaminated with a variety of germs (bacteria, viruses, parasites) or toxic substances (chemical toxins or natural toxins such as those in some mushrooms and molds).

  • Some foods are contaminated before they reach a kitchen.

  • Others are contaminated by food handlers.

Protect Yourself From Food Poisoning

Foods Linked to Food Poisoning

Some foods are more associated with foodborne illnesses and food poisoning than others. They can carry harmful germs that can make you very sick if the food is contaminated.

  • Raw foods of animal origin are the most likely to be contaminated, specifically raw or undercooked meat and poultry, raw or lightly cooked eggs, unpasteurized (raw) milk, and raw shellfish.

  • Fruits and vegetables also may get contaminated.

  • While certain foods are more likely to make you sick, any food can get contaminated in the field, during processing, or during other stages in the food production chain, including through cross-contamination with raw meat in kitchens.

Learn about steps you can take to avoid food poisoning:

Chicken, Beef, Pork, and Turkey

Avoid food poisoning use correct food temperatures for chicken and meat

Thoroughly cooking chicken, poultry products, and meat destroys germs.

Raw and undercooked meat and poultry can make you sick. Most raw poultry contains Campylobacter. It also may contain Salmonella, Clostridium perfringens, and other bacteria. Raw meat may contain Salmonella, E. coli, Yersinia, and other bacteria.

  • You should not wash raw poultry or meat before cooking it, even though some older recipes may call for this step. Washing raw poultry or meat can spread bacteria to other foods, utensils, and surfaces, and does not prevent illness.

  • Thoroughly cooking poultry and meat destroys germs. You can kill bacteria by cooking poultry and meat to a safe internal temperature.

  • Use a cooking thermometer to check the temperature. You can’t tell if meat is properly cooked by looking at its color or juices.

  • Leftovers should be refrigerated at 40°F or colder within 2 hours after preparation. Large cuts of meat, such as roasts or a whole turkey, should be divided into small quantities for refrigeration so they’ll cool quickly enough to prevent bacteria from growing.

Foodborne Illness and Raw Poultry and Meat:

Tips for Preparing Chicken, Turkey, and Other Meats:

Fruits and Vegetables

assorted fruits and veggies

The safest fruits and vegetables are cooked; the next safest are washed. Avoid unwashed fresh produce.

Eating fresh produce provides important health benefits, but sometimes raw fruits and vegetables may cause food poisoning from harmful germs such as Salmonella, E. coli, and Listeria. Fresh fruits and vegetables can be contaminated anywhere along the journey from farm to table, including by cross-contamination in the kitchen.

Food Safety Tips for Fruits and Vegetables

Raw Milk, Cheese, and Dairy Products

Dangers of Raw Milk and Dairy Products Made With Raw Milk

To prevent listeriosis, don’t consume raw milk and soft cheeses and other dairy products made from unpasteurized milk.

You can get very sick from raw milk and from dairy products made with raw milk, including soft cheeses such as queso fresco, blue-veined, feta, brie and camembert, as well as ice cream and yogurt. They can carry harmful germs, including Campylobacter,
Cryptosporidium, E. coli, Listeria, and Salmonella.

  • Raw milk products are made safe through pasteurization, which requires just enough heat to kill disease-causing germs.

  • Most of the nutritional benefits of drinking raw milk are also available from pasteurized milk, without the risk.

  • Although Listeria infection is very uncommon, a Listeria infection often has severe effects on older adults, fetuses and newborns.

Learn About the Dangers of Raw Milk and Cheese

Raw Eggs and Salmonella

hard boiled and cooked eggs

Cook eggs until the yolks and whites are firm.

Eggs can contain a germ called Salmonella that can make you sick, even if the egg looks clean and uncracked. Use pasteurized eggs and egg products when preparing recipes that call for raw or undercooked eggs. In addition:

  • Avoid foods that contain raw or undercooked eggs, such as homemade Caesar salad dressing and eggnog.

  • Cook eggs until the yolks and whites are firm.

  • Cook foods containing eggs thoroughly.

  • Keep eggs refrigerated at 40°F or colder.

  • Do not taste or eat raw batter or dough.

Tips for Preparing and Eating Eggs

Seafood and Raw Shellfish Food Poisoning

Raw oysters and food poisoning

Raw or undercooked oysters can contain Vibrio bacteria, which can lead to an infection called vibriosis.

Cook seafood to 145°F, and heat leftover seafood to 165°F. Avoid raw or undercooked fish, shellfish, or food containing raw or undercooked seafood, such as sashimi, some sushi, and ceviche.

Oysters and Food Poisoning

  • Oysters and other filter-feeding shellfish can contain viruses and bacteria that can cause illness or death.

  • Oysters harvested from contaminated waters can contain norovirus.

  • To avoid food poisoning, cook oysters well.

Food Safety for Seafood and Oysters

Sprouts and Food Poisoning

alfalfa sprouts

Eating raw or lightly cooked sprouts, such as alfalfa, bean, or any other sprout may lead to food poisoning.

The warm, humid conditions needed to grow sprouts are also ideal for germs to grow. Eating raw or lightly cooked sprouts, such as alfalfa, bean, or any other sprout may lead to food poisoning from Salmonella, E. coli, or Listeria. Thoroughly cooking sprouts kills the harmful germs and reduces the chance of food poisoning.

Raw Flour

bag of flour and raw batter in bowl

You should never taste raw dough or batter.

Flour is typically a raw agricultural product that hasn’t been treated to kill germs. Harmful germs can contaminate grain while it’s still in the field or at other steps as flour is produced. Bacteria are killed when food made with flour is cooked. That’s why you should never taste raw dough or batter.

Learn More

Raw Milk:

How many outbreaks are related to raw milk?

From 1993 through 2012, 127 outbreaks reported to CDC were linked to raw milk. These outbreaks included 1,909 illnesses and 144 hospitalizations. Most of the outbreaks were caused by Campylobacter, Shiga toxin-producing Escherichia coli, or Salmonella.

CDC collects data on foodborne disease outbreaks voluntarily reported by state, local, or territorial health departments.

Reported outbreaks represent the tip of the iceberg. Most illnesses are not a part of recognized outbreak, and for every outbreak and every illness reported, many others occur.

A large number of raw milk outbreaks involve children. At least one child younger than 5 was involved in 59% of the raw milk outbreaks reported to CDC from 2007 through 2012. Children aged 1 to 4 years accounted for 38% of Salmonella illnesses in these outbreaks and 28% of illnesses caused by Shiga toxin-producing E. coli, which can cause kidney failure and death.

Do more outbreaks related to raw milk occur in states where it is legal to sell?

Yes. States that allow the legal sale of raw milk for human consumption have more raw milk-related outbreaks of illness than states that do not allow raw milk to be sold legally.

More information:

How can I get more information about foodborne disease outbreaks linked to raw milk?

5 Raw Milk Myths Busted!

Learn about the real risks involved with raw milk.

Real Stories of the Dangers of Raw Milk

Find out how drinking raw milk affected three moms and their families.

Raw Milk Safety:

Trying to Decide about Raw Milk?

A healthy lifestyle involves many decisions and steps. One step you might be deciding about is adding raw milk to your diet. Some people think about drinking raw milk because they want to eat fewer processed foods or they want to support local farmers and sustainable agriculture. Others think about drinking raw milk because they heard claims that raw milk is better for their health. Yet, raw milk can be a home for bacteria and other germs that can cause people to become ill.

Harmful germs usually don’t change the look, taste, or smell of milk, so only when milk has been pasteurized can you be certain that these germs were killed. Pasteurization is the process of heating milk to a high enough temperature for a long enough time to kill disease-causing germs. Pasteurized milk is milk that has gone through this process. To make sure that milk remains safe, processors rapidly cool it after pasteurization, practice sanitary handling, and store milk in clean, closed containers at 45°F or colder.

Make the best decision for the health of your family. If you want to keep milk in your family’s diet, protect them by not giving them raw milk. Even healthy adults can get sick from drinking raw milk. If you’re thinking about drinking raw milk because you believe it has health benefits, consider other, less risky options.

Outbreak Studies

Raw Milk Questions and Answers

Dairy products

Raw milk is milk that has not been pasteurized to kill harmful bacteria. It can come from any animal. Raw milk can carry dangerous germs, such as Brucella, Campylobacter, Cryptosporidium, E. coli, Listeria, and Salmonella, which can pose serious health risks to you and your family.

Read the topics below to get answers to commonly asked questions about raw milk.

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What are the risks associated with drinking raw milk?

Raw milk is milk from any animal that has not been pasteurized to kill harmful bacteria. Raw milk can carry harmful bacteria and other germs that can make you very sick or kill you. While it is possible to get foodborne illnesses from many different foods, raw milk is one of the riskiest of all.

Some people who chose raw milk thinking they would improve their health instead found themselves (or their loved ones) sick in a hospital for several weeks due to infections caused by germs in raw milk. Getting sick from raw milk can mean many days of diarrhea, stomach cramping, and vomiting. Some people who drank raw milk have developed severe or even life-threatening diseases, including Guillain-Barré syndrome, which can cause paralysis, and hemolytic uremic syndrome, which can result in kidney failure, stroke, and even death.

Here are some things you should know:

  • Illness can occur from the same brand and source of raw milk that people had been drinking for a long time without becoming ill.

  • A wide variety of germs that are sometimes found in raw milk can make people sick. These germs include Brucella, Campylobacter, Cryptosporidium, E. coliListeria, and Salmonella.

  • Each ill person’s symptoms can differ depending on the type of germ, the amount of contamination, and the person’s immune defenses.

Who is at greatest risk of getting sick from drinking raw milk?

The risk of getting sick from drinking contaminated raw milk is greater for infants and young children, older adults, pregnant women, and people with weakened immune systems, such as people with cancer, an organ transplant, or HIV, than it is for healthy older children and adults. But healthy people of any age can get very sick or even die if they drink raw milk contaminated with harmful germs.

Can drinking raw milk hurt me or my family?

Yes. Raw milk can cause serious illnesses. Raw milk and raw milk products, including soft cheese, ice cream, and yogurt, can be contaminated with harmful bacteria and other germs that can cause serious illness, hospitalization, or death. These harmful germs include Brucella, Campylobacter, Cryptosporidium, E. coli, Listeria, and Salmonella.

From 1993 through 2012, 127 outbreaks reported to CDC were linked to raw milk. These outbreaks included 1,909 illnesses and 144 hospitalizations. Most of the outbreaks were caused by Campylobacter, Shiga toxin-producing Escherichia coli, or Salmonella. A large number of raw milk outbreaks involve children. At least one child younger than 5 was involved in 59% of the raw milk outbreaks reported to CDC from 2007 through 2012. Children aged 1 to 4 years accounted for 38% of Salmonella illnesses in these outbreaks and 28% of illnesses caused by Shiga toxin-producing E. coli, which can cause kidney failure and death.

Reported outbreaks represent the tip of the iceberg. Most illnesses are not a part of recognized outbreak, and for every outbreak and every illness reported, many others occur.

carton of milk

What is pasteurization, and what is pasteurized milk?

Pasteurization is the process of heating milk to a high enough temperature for a long enough time to kill illness-causing germs. Pasteurized milk is milk that has gone through this process.

What is the history of the recommendation for pasteurization in the United States?

Pasteurization was invented during a time when millions of people became sick and died of tuberculosis, scarlet fever, typhoid fever, and other diseases that were transmitted through raw milk. Pasteurization has prevented millions of people from becoming ill.

Routine pasteurization of milk began in the United States in the 1920s and became widespread by 1950 as a means to reduce contamination and reduce human illnesses. It led to dramatic reductions in the number of people getting sick. Most public health professionals and health care providers consider pasteurization one of public health’s most effective food safety interventions ever!

Many medical and scientific organizations recommend pasteurization for all milk consumed by humans; these include CDC, the Food and Drug Administration, the American Academy of Pediatrics, the American Veterinary Medical Association, the National Association of State Public Health Veterinarians, and others.

Does pasteurization change milk’s nutritional benefits?

Most of the nutritional benefits of drinking milk are available from pasteurized milk without the risk of disease that comes with drinking raw milk.

Is it true that raw milk has more enzymes and nutrients than pasteurized milk?

The heating process of pasteurization inactivates some enzymes in milk but scientists do not believe these enzymes are important in human health. Some nutrients are somewhat reduced in pasteurized milk, but the U.S. diet generally has plenty of other sources of these nutrients. For example, vitamin C is reduced by pasteurization, but raw milk is not a major source of vitamin C for humans.

Has pasteurized milk ever been linked to illnesses or outbreaks?

Pasteurized milk products have occasionally caused illnesses and outbreaks. Usually, this has happened because of germs introduced in the dairy after the pasteurization process. Pasteurized milk that is correctly handled in the dairy, bottled, sealed, and refrigerated after pasteurization, and that is properly handled by the consumer, is very unlikely to contain illness-causing germs. Considering the large amount of pasteurized milk that people drink, illness from it is very rare.

How does milk get contaminated?

image of farmer standing near cows who are eating

Milk contamination may occur in these ways:

  • Animal feces coming into direct contact with the milk

  • Infection of the udder (mastitis)

  • Cow diseases (for example, bovine tuberculosis)

  • Bacteria that live on the skin of animals

  • Environment (for example, feces, dirt, and processing equipment)

  • Insects, rodents, and other animal vectors

  • Unsanitary conditions in milk processing plant

  • Cross-contamination from dairy workers, such as contact with dirty clothing or boots

Pasteurization is the only way to kill many of the bacteria in milk that can make people very sick.

Does milk have a “built-in” safety mechanism that prevents bacterial contamination?

No. Disease-causing germs can be eliminated in milk only by pasteurization or by adding chemicals to the milk. Pasteurization is the best method of getting rid of disease-causing organisms in milk and the only method routinely used in the United States.

My farmer performs laboratory tests for bacteria in raw milk, so isn’t it safe?

No. Negative tests do not guarantee that raw milk is safe to drink. Milk that is safe one day may not be safe the next day. Also, tests do not always detect low levels of contamination. People have become very sick from drinking raw milk that came from farms that regularly tested their milk for bacteria and whose owners were sure that their milk was safe.

My farmer uses grass-fed cows and goats to produce raw milk, so isn’t it safe?

Outbreaks of illness related to raw milk have been traced back to both grass-fed and grain-fed animals.

My farmer’s raw milk is organic, so isn’t it safe?

Raw milk, regardless of whether it is organic, can contain harmful germs. Pasteurized organic milk is available in many places, including supermarkets, farmers’ markets, and dairies.

I’ve heard that many organic and raw milk producers are creating sanitary and humane conditions for raising animals and producing “safe” raw milk and raw milk products (like ice cream and cheese). Does this help reduce milk contamination?

Following good hygienic practices during milking can reduce the chance of milk contamination but not completely eliminate it.

That’s because illness-causing germs thrive in the environment of dairy farms, even if the farm or barns are kept clean and the farmers are careful when milking. Farmers cannot guarantee that their raw milk and the products made from it are free of harmful germs – even if tests indicate the raw milk does not contain harmful germs.

cows in grassy field

Can I still get a disease from raw milk and raw milk products if the animals are healthy, clean, and grass-fed or if the dairy is especially careful and clean when collecting the milk?

Yes. Even healthy animals may carry germs that can contaminate milk . Small numbers of bacteria can multiply and grow in milk from the time it is collected until the time a person drinks it. If the milk is not pasteurized to kill germs, people who drink it can get sick. Methods for collecting milk have improved over the years but cannot be relied on to be sure milk is safe to drink. Raw milk from “certified,” “organic,” or “local” dairies is not guaranteed to be safe. Only pasteurization can make milk safe to drink. You can find pasteurized organic milk and products made from it at many local, small farms.

Aren’t raw or natural foods better than processed foods?

Many people believe that foods with little to no processing are better for their health. Many people also believe that small, local farms are better sources of healthy food. However, some types of processing are needed to protect health. One type of processing happens when we cook raw meat, poultry, and fish to make them safe to eat. Similarly, when milk is pasteurized, it is made safe by heating it just long enough to kill disease-causing germs. Most nutrients remain in milk after it is pasteurized.

Is raw milk a good source of beneficial bacteria?

Raw milk contains bacteria, and some of them can be harmful. So, if you’re thinking about consuming raw milk because you believe it is a good source of beneficial bacteria, you need to know that you may instead get sick from the harmful bacteria. If you think that certain types of bacteria may be beneficial to your health, consider getting them from foods that don’t involve such a high risk. For example, pasteurized fermented foods, such as yogurt and kefir, contain bacteria that are safe to eat.

I know people who have been drinking raw milk for years, and they never got sick. Why is that?

The presence of germs in raw milk is unpredictable. People can drink it for a long time without getting sick, and then get sick if their milk is contaminated.

Is it legal to buy or sell raw milk?

In some states it is legal to buy or sell raw milk. Because of the chance for serious illness, federal law prohibits dairies from distributing raw milk across state lines in final package form (packaged so that it can be consumed). This means that raw milk can only be distributed across state lines if it is going to be pasteurized or used to make aged (more than 60 days) cheese before being sold to consumers. Each state makes its own laws about selling raw milk within the borders of the state. In about half of states, sale of raw milk directly to consumers is illegal. In the remaining states, raw milk may be sold directly to consumers.

 

 


A-Z Index for Foodborne Illness

 

CDC and Food Safety

Foodborne illness is a common, costly—yet preventable—public health problem. CDC estimates that 1 in 6 Americans get sick from contaminated foods or beverages each year, and 3,000 die. The U.S. Department of Agriculture (USDA) estimates that foodborne illnesses cost more than $15.6 billion each year.

What Is CDC’s Role in Food Safety?

CDC provides the vital link between illness in people and the food safety systems of government agencies and food producers.

grocery basket filled with food

CDC, the U.S. Food and Drug Administration (FDA), and USDA’s Food Safety and Inspection Service collaborate closely at the federal level to promote food safety. State and local health departments, the food industry, and consumers also play essential roles in all aspects of food safety.

CDC helps make food safer by:

  • Building state and local capacity to improve surveillance and investigation of foodborne illnesses through PulseNet, the Integrated Food Safety Centers of Excellence, and other programs.

  • Working with local, state, and federal partners to investigate outbreaks, and to implement systems to better detect, stop, and prevent them.

  • Using data to evaluate and revise foodborne disease prevention strategies and policies.

  • Working with other countries and international agencies to improve surveillance, investigation, and prevention of foodborne infections in the United States and around the world.

Bag and bowl of flour

Whole genome sequencing helped confirm that raw flour was the source of an E. coli outbreak in 2016.

A Better Way to Find Outbreaks

CDC is improving food safety by developing and sharing whole genome sequencing (WGS) technology with all 50 state PulseNet laboratories. CDC scientists and partners in local, state, and federal agencies use whole genome sequencing to show which bacterial strains are most alike genetically. Strains that are very alike may have the same source.

This laboratory method can provide important clues during outbreak investigations to help link specific sources of food to illness and death.  Genome sequencing provides scientists with more detailed genetic information about the bacteria that is causing an illness than the traditional DNA fingerprinting method, pulsed-field gel electrophoresis. This next-generation technology allows scientists to more efficiently find, investigate, and identify sources of foodborne outbreaks.

Whole genome sequencing helped confirm that raw flour was the source of an E. coli outbreak that sickened more than 60 people in 2016. Flour had long been suspected as an outbreak source, but this investigation showed it conclusively. More than 45 million pounds of flour were recalled.

 

Graph showing how the discovery of multi-state outbreaks increased from 1998 to 2015.

CDC scientists are continuing to find and solve more multistate outbreaks.

For example, since 2013 WGS has been improving CDC’s ability to detect Listeria outbreaks and link illnesses to food sources. CDC is quickly expanding WGS technology in U.S. local, state, and federal laboratories to better detect outbreaks of other foodborne pathogens, such as Shiga toxin-producing E. coli, Salmonella, and Campylobacter. CDC scientists are continuing to find and solve more multistate outbreaks.

Sometimes foods we love to eat and rely on for good health are contaminated with bacteria, viruses, and parasites that cause illness, and can be deadly for certain people. Efforts that focus on foods responsible for many illnesses are needed to protect people and reduce foodborne illnesses in America.

Challenges to food safety will continue to arise in unpredictable ways, largely due to:

  • Changes in our food production and supply, including more central processing and widespread distribution, and many imported foods.

  • New and emerging bacteria, toxins, and antibiotic resistance

  • Unexpected sources of foodborne illness, such as flour and meal replacement shake mixes.

The Threat of Antibiotic Resistance

Antibiotic resistance in foodborne bacteria is a growing food safety challenge that is made worse by overuse of antibiotics in people and food animals. CDC estimates that every year, more than 400,000 people in the United States are sickened with resistant Salmonella or Campylobacter.

Preventing foodborne infections from resistant bacteria is not easy. To address this important issue, CDC works closely with partners including federal agencies, state and local health departments, the food industry, healthcare providers, and academia. Key parts of the strategy include:

  • Increasing state laboratory capacity to detect foodborne drug-resistant bacteria using whole genome sequencing, investigating cases using enhanced patient interviews, and preventing illnesses by rapidly responding to outbreaks.

  • Using surveillance data to detect the emergence and spread of specific resistance genes and patterns.

  • Working with partners to ensure veterinarians have the tools, information, and training to prevent drug resistance by using antibiotics appropriately.

  • Working within the One Health framework, across the human, animal, and environment sectors to improve food safety and the health of people and animals.

World Health Day

Food Safety

New data on the harm caused by foodborne illnesses underscore the global threats posed by unsafe foods, and the need for coordinated, cross-border action across the entire food supply chain. World Health Day 2015 highlights the challenges and opportunities associated with food safety.

Articles

Norovirus Genotype Profiles Associated with Foodborne Transmission, 1999–2012
Verhoef, Linda et al (2015 Volume 21, Number 4)

Two Outbreaks of Listeria monocytogenes Infection, Northern Spain
Perez-Trallero, Emilio et al (2014 Volume 20, Number 12)

Foodborne Illness, Australia, Circa 2000 and Circa 2010
Kirk, Martyn et al (2014 Volume 20, Number 11)

Sequelae of Foodborne Illness Caused by 5 Pathogens, Australia, Circa 2010
Ford, Laura (2014 Volume 20, Number 11)

Increasing Prevalence and Intensity of Foodborne Clonorchiasis, Hengxian County, China, 1989–2011
Qian, Men-Bao et al (2014 Volume 20, Number 11)

Frequent Hepatitis E Virus Contamination in Food Containing Raw Pork Liver, France
Nicole Pavio, Thizri Merbah, and Anne Thebault (2014 Volume 20, Number 11)

Bacteria in Dairy Products in Baggage of Incoming Travelers, Brazil
Barros de Melo, Christiano et al (2014 Volume 20, Number 11)

Foodborne Transmission of Hepatitis E Virus from Raw Pork Liver Sausage, France
Renou, Christophe et al (2014 Volume 20, Number 11)

Misidentification of Diphyllobothrium Species Related to Global Fish Trade, Europe
Kuchta, Roman et al (2014 Volume 20, Number 11)

Prevalence of Arcobacter Species among Humans, Belgium, 2008–2013
Van den Abeele, Anne-Marie et al 2014 Volume 20, Number 10)

Factors Contributing to Decline in Foodborne Disease Outbreak Reports, United States
Imanishi, Maho et al (2014 Volume 20, Number 9)

Incidence of Cronobacter spp. Infections, United States, 2003–2009
Patrick, Mary E. et al (2014 Volume 20, Number 9)

Household-Level Spatiotemporal Patterns of Incidence of Cholera, Haiti, 2011
Blackburn, Jason K. et al (2014 Volume 20, Number 9)

Stability of Middle East Respiratory Syndrome Coronavirus in Milk
Van Doremalen, Neeltje et al (2014 Voume 20, Number 7)

Carbapenemase-producing Organism in Food, 2014
Rubin, Joseph E.; Ekanayake, Samantha; and Fernadno, Champika (2014 Volume 20, Number 7)

Identification of Possible Virulence Marker from Campylobacter jejuni Isolates
Harrison, James W. et al (2014 Volume 20, Number 6)

Underdiagnosis of Foodborne Hepatitis A, the Netherlands, 2008–2010
Ptrignani, Mariska et al (2014 Volume 20, Number 4)

Gnathostoma spinigerum in Live Asian Swamp Eels (Monopterus spp.) from Food Markets and Wild Populations, United States
Cole, Rebecca A. et al (2014 Volume 20, Number 4)

Medscape CME Activity
Travel-associated Antimicrobial Drug–Resistant Nontyphoidal Salmonellae, 2004–2009
Barclay, Laurie (2014 Volume 20, Number 4)

Incorporating Research and Evaluation into Pandemic Influenza Vaccination Preparedness and Response Shimabukaro, Tom T. and Redd, Stephen C. (2014 Volume 20, Number 4)

Podcasts

Carbapenemase-producing Organism in Food
(2014 Volume 20, Number 7)

Dangerous Raw Oysters
(2015 Volume 21, Number 6)

Outbreak-associated Salmonella enterica Serotypes and Food Commodities, United States, 1998- 2008
(2013 Volume 19, Number 8)

Knowing Which Foods Make Us Sick Will Help Guide Food Safety Regulations
(Volume 19, Number 3)

Investigating Listeria Outbreaks
(2013 Volume 19, Number 1)

Other Resources

Centers for Disease Control and Prevention

World Health Organization

Source: CDC

By Types of Foods-From FoodSafety.Gov

Charts: Food Safety at a Glance

How long can you store leftovers in the refrigerator?  How can you tell when chicken breasts are done?   How long does it take to cook a turkey?  Check out these charts for fast answers.


Photo of stored food

Storing Food
Whether putting food in the refrigerator, the freezer, or the cupboard, you have plenty of opportunities to prevent foodborne illnesses.


Sample Chart

Preparing and Cooking Food
One of the basics of food safety is cooking food to its proper temperature. Foods are properly cooked when they are heated for a long enough time and at a high enough temperature to kill the harmful bacteria that cause foodborne illness.


Some foods are more frequently associated with food poisoning or foodborne illness. With these foods, it is especially important to:

  • CLEAN: Wash hands and food preparation surfaces often. And wash fresh fruits and vegetables carefully.

  • SEPARATE: Don't cross-contaminate!  When handling raw meat, poultry, seafood and eggs, keep these foods and their juices away from ready-to-eat foods.

  • COOK: Cook to proper temperature. See the Minimum Cooking Temperatures chart for details on cooking meats, poultry, eggs, leftovers, and casseroles.

  • CHILL: At room temperature, bacteria in food can double every 20 minutes. The more bacteria there are, the greater the chance you could become sick. So, refrigerate foods quickly because cold temperatures keep most harmful bacteria from multiplying.

Get the latest tips and techniques to keep these foods safe and prevent food poisoning.

meat

Meat
Raw meat may contain bacteria, such as E. coli, salmonella, and listeria, or parasites. Thorough cooking destroys these harmful organisms, but meat can become contaminated again if it is not handled and stored properly.

roast turkey

Turkey
Turkey is often associated with holidays and parties. But, turkey can also be associated with foodborne illness if it is not thawed, prepared, cooked, and stored properly.

roast chicken

Chicken and Other Poultry
Poultry may contain harmful bacteria such as salmonella, listeria, and campylobacter. Washing chicken and other poultry does not remove bacteria. You can kill these bacteria only by cooking chicken to the proper temperature.

seafood

Seafood
Like raw meat, raw seafood may contain bacteria that can be destroyed only by cooking. Some seafood may also contain toxins such as mercury which may be harmful for young children or an unborn baby.

eggs

Eggs and Egg Products
Fresh eggs must be handled carefully. Even eggs with clean, uncracked shells may occasionally contain salmonella. To prevent food poisoning, keep eggs refrigerated, cook eggs until yolks are firm, and cook foods containing eggs thoroughly.

milk and other dairy products

Milk, Cheese, and Dairy Products
Raw milk, as well as cheeses made with raw milk, may contain E. coli, salmonella, and listeria. That’s why it’s important to make sure that milk has been pasteurized, which kills harmful bacteria.

fruits and vegetables

Fresh Fruits, Vegetables, and Juices
Fresh produce may come in contact with harmful bacteria from many sources, from contaminated soil and water in the fields to a contaminated cutting board in the kitchen. Fruit and vegetable juices must be treated to kill bacteria.

Peanuts surrounding an open jar of peanut butter, and a slice of bread with peanut butter next to a butter knife.

Nuts, Grains, and Beans
Nuts, grains, beans, and other legumes, and their by-products, are found in a wide variety of foods. Since these foods are ingredients in so many food products, contamination or mislabeling of allergens can pose a widespread risk.

Baby Food and Infant Formula

Baby Food and Infant Formula
Infants and young children are particularly vulnerable to foodborne illness because their immune systems are not developed enough to fight off infections. That's why extra care should be taken when handling and preparing their food and formula.

Pet Food

Pet Food
Like human food, pet food may contain harmful bacteria (such as salmonella) or toxins (such as melamine). If pet food is not handled properly, both pets and humans may be at risk for foodborne illness.

Meat

A beef dinner dish with fries and garnish.

Focus on Ground Beef (USDA)
The most frequently asked questions about ground beef.

The Color of Meat and Poultry (USDA)  
Why are there differences in the color and what do they mean?

Water in Meat and Poultry (USDA)
Answers to questions about water in packages of fresh meat and poultry.

Meat and Poultry Roasting Chart
Details on oven temperatures, timing, and safe minimum internal temperatures for a variety of meats.

Note: For versions of these fact sheets in PDF format and en Español, see Meat Preparation (USDA). 

Type of Meat

Resources

Beef

Beef: From Farm to Table (USDA)
Includes charts on beef cooking times and storage times.

Bison

Bison from Farm to Table (USDA)
Safe storage, handling, and preparation of bison.

Corned Beef

Corned Beef and Food Safety (USDA)
Safe preparation, cooking, and storage of corned beef.

Game

Food Safety of Farm-Raised Game (USDA)
Learn about safe handling of venison, antelope, boar, and other game.

Goat

Goat from Farm to Table (USDA)
Safe storage, handling, and preparation of goat.

Ham

Ham and Food Safety (USDA)
Includes charts on cooking and storing ham.

Ham Cooking Chart

Ham Storage Chart

Hamburger (Ground Beef)

Ground Beef (USDA)
The most frequently asked questions about ground beef.

Color of Cooked Ground Beef as It Relates to Doneness (USDA)
Is color a good indicator of doneness? Not always. Use a meat thermometer to make sure that ground beef is cooked to 160 °F.

Hot Dogs

Hot Dogs and Food Safety (USDA)
Find out what’s in a hot dog and how to keep them safe.

Jerky

Food Safety of Jerky (USDA)
The safest procedure to follow when making homemade jerky.

Lamb

Lamb from Farm to Table (USDA)
Safe storage, handling, cooking methods, and approximate cooking times for lamb.

Pork

Pork from Farm to Table (USDA)
Safe storage, handling, cooking methods, and approximate cooking time for pork.

Rabbit

Rabbit from Farm to Table (USDA)
Safe storage, handling, cooking methods, and approximate cooking times for rabbit.

Sausages

Sausages and Food Safety (USDA)
Includes a storage chart on proper handling.

Veal

Veal from Farm to Table (USDA)
Safe storage, handling, cooking methods, and approximate cooking time for veal.

Turkey

Roast Turkey Dinner

For general information on preparing and storing poultry, see Poultry.

For versions of these fact sheets in PDF format and en Español, see Poultry Preparation (USDA).

Turkey Basics

Turkey Basics: Safe Thawing (USDA)
Three safe methods for thawing turkey.

Turkey Basics: Stuffing (USDA)
Use a food thermometer to ensure that the stuffing temperature reaches 165 °F.

Stuffing and Food Safety (USDA)
Can you prepare stuffing ahead of time? Is it safer to cook stuffing separately? Get answers to these questions and more.

Turkey Basics: Safe Cooking (USDA)
Includes cooking times for stuffed and unstuffed birds.

Turkey Basics: Handling Cooked Dinners (USDA)
Handling and storing leftovers and cooked meals.

YouTube video: Let's Talk About Thawing a Turkey (USDA)
Learn the three safe methods for thawing a turkey.

Turkey Charts

Turkey Thawing Chart
Approximate times for thawing in the refrigerator and in cold water.

Turkey Roasting Chart
Details on roasting stuffed and unstuffed turkeys.

Alternative Ways to Cook Turkey
How to grill, smoke, microwave, and deep fat fry turkeys.

Other Turkey Tips

Let's Talk Turkey—A Consumer Guide to Safely Roasting a Turkey (USDA)
Includes charts for thawing (in the refrigerator or in water) and roasting (stuffed or unstuffed).

Is Pink Turkey Meat Safe? (USDA)
The color of cooked meat and poultry is not always a sure sign of its degree of doneness.

Turkey: Alternate Routes to the Table (USDA)
Includes a summary chart on smoking, deep-fat frying, microwaving, and other methods for preparing turkey.

Turkey from Farm to Table (USDA)
Safe storage, handling, cooking methods and approximate cooking times (traditional and microwave).

Chicken and Other Poultry

Roasted ChickenFor information on preparing and storing turkey, see Turkey.

The Color of Meat and Poultry (USDA)
Why are there differences in the color and what do they mean?

Hock Locks and Other Accoutrements (USDA)
What happens if you cook poultry with the metal, plastic, paper, or other items in the packaging?

Poultry: Basting, Brining, and Marinating (USDA)
Safety tips for basting, brining, and marinating poultry. 

The Poultry Label Says "Fresh" (USDA)
Understanding the difference between fresh and frozen poultry

Water in Meat and Poultry (USDA)
Answers to questions about water in packages of fresh meat and poultry.

Meat and Poultry Roasting Chart
Details on oven temperatures, timing, and safe minimum internal temperatures for a variety of meats.

For versions of these fact sheets in PDF format and en Español, see Poultry Preparation (USDA).

Type of Poultry

Resources

Chicken

Chicken From Farm to Table (USDA)
Safe storage, handling, cooking methods and times for chicken.

Duck

Duck and Goose from Farm to Table (USDA)
Safe storage, handling, cooking methods, and cooking times for duck.

Emu

Ratites (Emu, Ostrich, and Rhea) (USDA)
Safe storage, handling, and cooking methods for these birds.

Game Birds

Food Safety of Farm-Raised Game (USDA)
Learn about safe handling of partridge, quail, pheasant, and other game birds.

Giblets

Giblets and Food Safety (USDA)
Inspection, processing, safe handling, and cooking of poultry giblets.

Goose

Duck and Goose from Farm to Table (USDA)
Safe storage, handling, cooking methods and times for goose.

Ground Poultry

Ground Poultry and Food Safety (USDA)
Labeling, storage, and cooking of ground poultry.

Ostrich

Ratites (Emu, Ostrich, and Rhea) (USDA)
Safe storage, handling, and cooking methods for these birds.

Rhea

Ratites (Emu, Ostrich, and Rhea) (USDA)
Safe storage, handling, and cooking methods for these birds.

 

Seafood

Seafood Safety

Fish and shellfish are an important part of a healthful diet. In fact, a well-balanced diet that includes a variety of fish and shellfish can contribute to heart health and children's growth and development. But, as with any type of food, it's important to handle seafood safely in order to reduce the risk of foodborne illness.

Fresh and Frozen Seafood: Selecting and Serving it Safely

Mercury in Seafood

What You Need to Know About Mercury in Fish and Shellfish (FDA)
Advice for pregnant women (and those thinking about pregnancy), nursing mothers, and young children.

Risks of Eating Raw Oysters

Raw Oyster Myths (FDA)
Hot sauce does not kill harmful bacteria in raw oysters; neither does alcohol. Get the facts behind the myths.

Raw Oysters Contaminated With Vibrio vulnificus Can Cause Illness and Death (FDA)
Explains the risks associated with eating raw oysters and how to prevent serious illness.

General Information on Seafood

Fresh and Frozen Seafood: Selecting and Serving it Safely (FDA)
How to handle seafood safely in order to reduce the risk of foodborne illness.

Seafood Questions and Answers (FDA)
Selecting safe seafood, figuring out if a fish is fresh, spotting a safe seafood seller, and more.

Cooperative Program Ensures Safe Shellfish (FDA)
How industry and government work together to keep shellfish safe.
See the slideshow or read the article

Eggs and Egg Products

 

Eggs are one of nature's most nutritious and economical foods. But, you must take special care with handling and preparing fresh eggs and egg products to avoid food poisoning.

Egg Basics

Thorough cooking is an important step in making sure eggs are safe.

  • Scrambled eggs: Cook until firm, not runny.

  • Fried, poached, boiled, or baked: Cook until both the white and the yolk are firm.

  • Egg mixtures, such as casseroles: Cook until the center of the mixture reaches 160 °F when measured with a food thermometer.

Egg Recipes: Playing It Safe

  • Homemade ice cream and eggnog are safe if you do one of the following:

    • Use a cooked egg-milk mixture. Heat it gently and use a food thermometer to ensure that it reaches 160 °F.

    • Use pasteurized eggs or egg products.

  • Dry meringue shells, divinity candy, and 7-minute frosting are safe — these are made by combining hot sugar syrup with beaten egg whites. However, avoid icing recipes using uncooked eggs or egg whites. 

  • Meringue-topped pies should be safe if baked at 350 °F for about 15 minutes. But avoid chiffon pies and fruit whips made with raw, beaten egg whites — instead, substitute pasteurized dried egg whites, whipped cream, or a whipped topping.

  • Adapting Recipes: If your recipe calls for uncooked eggs, make it safe by doing one of the following:

    • Heating the eggs in one of the recipe’s other liquid ingredients over low heat, stirring constantly, until the mixture reaches 160 °F. Then, combine it with the other ingredients and complete the recipe. Or use pasteurized eggs or egg products.

    • Using pasteurized eggs or egg products.

Note: Egg products, such as liquid or frozen egg substitute, are pasteurized, so it’s safe to use them in recipes that will be not be cooked. However, it’s best to use egg products in a recipe that will be cooked, especially if you are serving pregnant women, babies, young children, older adults, and people with weakened immune systems.

General Information

Egg Storage Chart
Details on refrigerating and freezing raw eggs, cooked eggs, and egg dishes. 

Egg Safety and Eating Out
Practical things that you can do to keep your family safe.

Tips to Reduce Your Risk of Salmonella from Eggs (CDC)
If eggs are eaten raw or undercooked, Salmonella bacteria can cause illness.

Playing it Safe With Eggs: What Consumers Need to Know (FDA)
How to buy, cook, serve, store, and transport fresh eggs to avoid salmonella poisoning. From Consumer Information about Egg Safety

Egg Products and Food Safety (USDA)
How to use liquid, frozen, and dried egg products safely.

Shell Eggs from Farm to Table (USDA)
Answers to questions on eggs, from how often a hen lays an egg to the safety of Easter eggs to egg storage guidelines.

Milk, Cheese, and Dairy Products

Myths About Raw Milk

Milk, cheels, and dairy products (included ice cream)Pasteurization is a process that kills harmful bacteria by heating milk to a specific temperature for a set period of time. Some people continue to believe that pasteurization harms milk and that raw milk is a safe healthier alternative.

Raw milk can harbor dangerous microorganisms, such as Salmonella, E. coli, and Listeria, that can pose serious health risks to you and your family.

Here are some common myths and proven facts about milk and pasteurization:

  • Raw milk DOES NOT kill dangerous pathogens by itself.

  • Pasteurizing milk DOES NOT cause lactose intolerance and allergic reactions. Both raw milk and pasteurized milk can cause allergic reactions in people sensitive to milk proteins.

  • Pasteurization DOES NOT reduce milk's nutritional value.

  • Pasteurization DOES NOT mean that it is safe to leave milk out of the refrigerator for extended time,particularly after it has been opened.

  • Pasteurization DOES kill harmful bacteria.

  • Pasteurization DOES save lives.

Food Safety and Raw Milk (CDC) 
Comprehensive information on the dangers of raw milk, including:

The Dangers of Raw Milk (FDA)
Raw milk can harbor dangerous microorganisms that can pose serious health risks.

Questions & Answers: Raw Milk (FDA)
Raw milk is not safe to drink. Find out more about the risks.

Raw Milk May Pose Health Risk (FDA)
Consumer update on raw milk

Raw Milk Misconceptions and the Danger of Raw Milk Consumption (FDA)
Point and counterpoint on popular myths about raw milk

The Dangers of Raw Milk (FDA)
Unpasteurized milk can pose a serious health risk

Food Safety and Raw Milk (FDA)
Understanding health risks associated with raw milk.

Raw Milk Questions and Answers
Frequently asked questions and answers about the risks of drinking raw milk.

Cheese

Preventing Listeriosis In Pregnant Hispanic Women in the U.S. (FDA)
When pregnant women eat Mexican-style soft cheeses, they are putting their unborn babies at risk!

Ice Cream

Enjoying Homemade Ice Cream without the Risk of Salmonella Infection (FDA)
To avoid the risk of salmonella infection, use a pasteurized egg product instead of raw eggs.

Fresh Fruits, Vegetables, and Juices

General Information Frest fruits, vegetables, and juices

Produce Safety: Safe Handling of Raw Produce and Fresh-Squeezed Juices (FDA)
Tips and Q&As on buying, storing and preparing fresh produce.

Talking About Juice Safety: What You Need to Know (FDA)
Consuming untreated juices can pose health risks to your family.

Tips

Tips for Fresh Produce Safety
Buying and storing produce to prevent foodborne illness.

Two Simple Steps to Juice Safety
Make sure that juice has been pasteurized or treated to kill harmful bacteria.

Sprouts: What You Should Know
Eating raw sprouts may lead to foodborne illness, especially in susceptible individuals.

Nuts, Grains, and Beans

Peanuts surrounding an open jar of peanut butter, and a slice of bread with peanut butter next to a butter knife.Nuts, grains, beans, and other legumes, and their by-products, are found in a wide variety of foods. Since these foods are ingredients in so many food products, contamination or mislabeling of allergens can pose a widespread risk. 

Contamination may come from harmful bacteria such as salmonella, some foods in these categories, particularly grains, are also susceptible to chemical environmental risks.

Several of these foods – including tree nuts, peanuts, wheat, and soybeans – have been classified as major food allergens by the U.S. Food and Drug Administration. The law requires that all foods are labeled with their ingredients, and that labels clearly identify any of the major food allergens or their protein derivatives.

Learn more by referring to the resources below.

Risks and Contamination

Arsenic in Rice (FDA) The U.S. Food and Drug Administration shares important information on the presence of arsenic, a chemical associated with long-term health effects, in rice. Find out what you should do, and what steps the FDA is taking.

Salmonella in Peanut Butter (CDC) The Centers for Disease Control and Prevention confirmed the presence of Salmonella bacteria in certain samples of peanut butter and other nut products beginning September 2012. Find details about their investigation and read their advice to consumers.

Recalled Peanut Product Database (FDA) Search this database to learn if any peanut products in your pantry have been affected by the multi-state Salmonella outbreak.

2009 Peanut Product Recall (FDA) In March 2009, the U.S. Food and Drug Administration requested a recall on certain products containing peanuts due to a contamination threat.  Find details about the investigation and read advice to consumers.

General Allergy Information

Food Allergy Information (FDA) Learn about major food allergens, labeling, and what to do if symptoms occur.

Flour, Raw Dough, and Raw Batter

Flour Safety Basics

  • Do not eat or play with flour, raw dough exit disclaimer icon, or raw batter that is intended to be cooked.

  • Do not use flour in items that are not intended to be cooked.

  • If you or someone you are cooking for has a food allergy, carefully check the labels of any flour or baking mixes you plan to use.

People often understand that it is dangerous to eat raw eggs because of the risk of Salmonella, but eggs aren’t the only potential carrier of foodborne illness in raw dough or batter. Raw flour may be contaminated with harmful bacteria such as E. coli.

Flour can be made from a variety of grains, nuts, and legumes including wheat, soy, tree nuts, and peanuts, all four of which the U.S. Food and Drug Administration classifies as major food allergens. Manufacturers are legally required to list ingredients and clearly identify any major allergens (or their protein derivatives) on the labels of food products.

Cooking with Flour

Throw out recalled products

  • Although CDC closed its investigation into the E. coli outbreak, continued illness from recalled products is expected due to the long shelf life of flour and baking mixes.

  • Check CDC’s recall page exit disclaimer icon that lists all affected products. Throw out any flour or baking mixes on the recall list.

  • If you stored recalled flour in a reusable container, be sure to thoroughly wash and sanitize the container before using it again.

  • If you are unsure if the flour is included in the recall, throw out the product.

Separate flour, raw dough, or raw batter

  • Keep raw foods, including any flour products, separate from other foods while preparing them to prevent cross-contamination before cooking.

  • Use separate bowls, measuring cups, and utensils for flour, raw dough, and raw batter.

Bake it before you bite it

  • Do not eat or play with flour, raw dough, or raw batter.

  • Do not add flour to foods that will not be cooked, such as milkshakes, ice-cream mixes.

  • Do not taste flour, raw dough, or raw batter. Eating even a small amount can make you sick.

  • Bake/cook items containing flour, raw dough, or raw batter thoroughly before eating them, including flour used for thickening.

  • Follow package directions on mixes for proper cooking temperatures and times.

Keep it cool and clean

  • Refrigerate baked goods containing fillings (such as cream) promptly after making or purchasing them to prevent illness-causing bacteria from growing.

  • Wash any bowls, utensils, and other surfaces that were used when baking with hot water and soap. The surfaces to be cleaned may extend beyond the immediate work area, because flour is powdery and tends to spread.

  • Wash your hands with water and soap after baking.

Baby Food and Infant Formula

Infants and young children are particularly vulnerable to foodborne illness because their immune systems are not developed enough to fight off infections. That's why extra care should be taken when handling and preparing their food and formula.

Baby Food      

Baby FoodThe most important action that you can take to prevent foodborne illness in your babies and children is to wash your hands. Your hands can pick up harmful bacteria from pets, raw foods (meat, poultry, seafood, eggs), soil, and diapers.

Always wash your hands:

  • Before and after handling food

  • After using the bathroom, changing diapers, or handling pets.

Other ways to keep your baby’s food safe:

  • Check the packaging of commercial baby food before serving: The following may indicate that the food is contaminated or at risk of bacterial contamination:

    • For jars: Make sure that the safety button on the lid is down. Discard any jars that don’t “pop” when opened or that have chipped glass or rusty lids.

    • For plastic pouches: Discard any packages that are swelling or leaking.

  • Don’t “double dip” with baby food: Never put baby food in the refrigerator if the baby doesn’t finish it. Your best bet: Don’t feed your baby directly from the jar of baby food. Instead, put a small serving of food on a clean dish and refrigerate the remaining food in the jar. If the baby needs more food, use a clean spoon to serve another portion. Throw away any food in the dish that’s not eaten. If you do feed a baby from a jar, always discard any remaining food.

  • Don’t share spoons: Don’t put the baby’s spoon in your mouth or anyone else’s mouth – or vice versa. If you want to demonstrate eating for your baby, get a separate serving dish and spoon for yourselv.

  • Never leave any open containers of liquid or pureed baby food out at room temperature for more than two hours: Harmful bacteria grows rapidly in food at room temperature.

  • Store opened baby food in the refrigerator for no more than three days: If you’re not sure that the food is safe, remember this saying: “If in doubt, throw it out.”

General Information on Baby Food

Once Baby Arrives: Food Safety for Moms-to-Be (FDA)
Do’s and don’ts for feeding your baby, plus tips on microwaving baby food and when to call the doctor. 

Infant Formula

Infant FormulaIf you’re the parent or caretaker of an infant, you’ve probably heard that breast milk is the best source of nutrition for infants. In situations in which it’s not possible to breastfeed an infant, you may choose to use a commercially prepared infant formula.

Why can’t I give my baby cow’s milk?

Cow's milk by itself is not appropriate for infants less than 1 year old. Cow’s milk does not have the correct balance of nutrients for infants to grow and develop normally, and it can cause problems with anemia and kidney function.

Raw milk is never appropriate for infants – or anyone else. It should not be consumed by anyone at any time for any purpose. Raw milk can harbor dangerous microorganisms, such as Salmonella, E. coli, and Listeria, that can pose serious health risks.

But isn’t formula made from cow’s milk?

Most infant formula is made with cow's milk, but it has been modified and supplemented with additional nutrients. As a result, the formula is more nutritious and easier for the baby to digest than cow’s milk. Other formula options include soy-based formulas and hypoallergenic (or protein hydrolysate and amino acid-based) formulas. Special formulas are available for babies who are premature or have other health problems.

How does the government regulate infant formula?

The FDA does not approve infant formulas before they can be marketed. All formulas marketed in the United States, however, must meet Federal nutrient requirements. The FDA also monitors infant formula, which means that it inspects facilities that manufacture formula and analyzes samples.

What can I do to make sure that formula is safe for my baby?

Here are a few basic steps that you can follow to ensure that formula is safe from bacteria that can cause illness.

  • Prepare safe water for mixing: Bring tap water to a roiling boil and boil it for one minute. If you use bottled water, follow this same process unless the label indicates that it is sterile. Then, cool the water quickly to body temperature before mixing the formula.

  • Use clean bottles and nipples: You may want to sterilize bottles and nipples before first use. After that, it’s safe to wash them by hand or in a dishwasher.

  • Don't make more formula than you will need: Formula can become contaminated during preparation, and bacteria can multiply quickly if formula is improperly stored. Your best bet: prepare formula in smaller quantities on an as-needed basis to greatly reduce the possibility of contamination. And always follow the label instructions for mixing formula.

General Information on Infant Formula

Infant Formulas (NIH MedlinePlus)
Trusted information on types of formula, recommendations, and side effects of improper use.

FDA 101: Infant Formula (FDA)
The basics on types of formula, along with safety tips and instructions for reporting problems.

Safe Preparation, Storage and Handling of Powdered Infant Formula (World Health Organization)
Guidelines on infant formula in English, French, Spanish, Chinese, Russian, Arabic, and Japanese.

Pet Food

Pet FoodMany people don’t realize that the basic principles of food safety apply to their pets’ foods too. For example, pet food or treats contaminated with Salmonella can cause infections in dogs and cats. And contaminated pet food that is not handled properly can cause serious illness in people too, especially children.

If you’re a pet owner, one of the most important things you can do to keep your pets, your family, and yourself safe from foodborne illness is to wash your hands:

  • Before and after handling pet foods and treats, wash your hands for 20 seconds with hot running water and soap. (Tip: Sing “Happy Birthday” twice to time yourself.)

  • After petting, touching, handling, or feeding your pet, and especially after contact with feces, wash your hands for 20 seconds.

  • Wash hands before preparing your own food and before eating.

Because infants and children are especially susceptible to foodborne illness, keep them away from areas where you feed your pets. Never allow them to touch or eat pet food.

General Information

Safe Handling Tips for Pet Foods and TreatsSafe Handling Tips for Pet Foods and Treats (FDA)
Pets can get food poisoning, too. How to buy, prepare, and store pet food to avoid contamination.

Pet Food (FDA)
Details on how the FDA ensures that pet foods are properly labeled and contain safe ingredients.

FDA 101: Animal Feed (FDA)
Yes: Pet food, including dry and canned food and pet treats, is considered animal feed.

How to Report a Pet Food Complaint (FDA)
Before you contact the FDA, review this checklist on the pet food product and any symptoms your pet may have.

Think Food Safety (FDA)
We know to wash our hands before eating dinner and after using the bathroom, but what about after handling pet food?

Salmonella and Dry Pet Food

Salmonella from Dry Pet Food and Treats (CDC)
Follow these tips to help prevent an infection with Salmonella from handling dry pet food and treats.

Podcast: Tips to Reduce Your Risk of Getting a Salmonella Infection from Dry Pet Food
Listen to the podcast or read the script (2:56 minutes)

Concerns Related to Specific Recalls

Check the Food Safety widget to get the latest recalls on pet food and animal feed, as well as other food recalls.

Melamine Pet Food Recall of 2007 (FDA)
Certain pet foods contaminated with melamine were sickening and killing cats and dogs in 2007.

Caution to Dog Owners About Chicken Jerky Products (FDA)
Chicken jerky products such as chicken tenders, strips, or treats may cause illnesses in dogs.

Questions and Answers: Human Illness (Salmonella) Associated with Dry Pet Food (CDC)
In 2007, Salmonella linked to dry pet food sickened 62 people in 18 states. 

https://www.foodsafety.gov/keep/types/petfood/index.html