What is Food Poisoning?
Foodborne illness, more commonly referred to as food poisoning, is the result of eating contaminated, spoiled, or toxic food. The most common symptoms of food poisoning include nausea, vomiting, and diarrhea.
Although it’s quite uncomfortable, food poisoning isn’t unusual. According to the Centers for Disease Control and Prevention (CDC), 1 in 6 Americans will contract some form of food poisoning every year.
Symptoms of Food Poisoning
If you have food poisoning, chances are it won’t go undetected. Symptoms can vary depending on the source of the infection. The length of time it takes for symptoms to appear also depends on the source of the infection, but it can range from as little as 1 hour to as long as 28 days. Common cases of food poisoning will typically include at least three of the following symptoms:
- loss of appetite
- mild fever
- abdominal cramps
Symptoms of potentially life-threatening food poisoning include:
- difficulty seeing or speaking
- symptoms of severe dehydration, which may include dry mouth, passing little to no urine, and difficulty keeping fluids down
- diarrhea persisting for more than three days
- a fever higher than 101.5°F
- bloody urine
If you experience any of these symptoms, you should contact your doctor immediately.
Causes of Food Poisoning
Most food poisoning can be traced to one of the following three major causes:
Food poisoning can also be caused by a virus. The norovirus, also known as the Norwalk virus, causes over 19 million cases of food poisoning each year. In rare cases, it can be fatal. Sapovirus, rotavirus, and astrovirus bring on similar symptoms, but they’re less common. Hepatitis A virus is a serious condition that can be transmitted through food.
Bacteria is by far the most prevalent cause of food poisoning. When thinking of dangerous bacteria, names like E. coli, Listeria, and Salmonella come to mind for good reason. Salmonella is by far the biggest culprit of serious food poisoning cases in the United States. According to the CDC, an estimated 1,000,000 cases of food poisoning, including nearly 20,000 hospitalizations, can be traced to salmonella infection annually. Campylobacter and C. botulinum ( botulism) are two lesser-known and potentially lethal bacteria that can lurk in our food.
Food poisoning caused by parasites is not as common as food poisoning caused by bacteria, but parasites spread through food are still very dangerous. Toxoplasma is the parasite seen most often in cases of food poisoning. It’s typically found in cat litter boxes. Parasites can live in your digestive tract undetected for years. However, people with weakened immune systemsand pregnant women risk serious side effects if parasites take up residence in their intestines.
How does food become contaminated?
Pathogens can be found on almost all of the food that humans eat. However, heat from cooking usually kills pathogens on food before it reaches our plate. Foods eaten raw are common sources of food poisoning because they don’t go through the cooking process.
Occasionally, food will come in contact with the organisms in fecal matter. This most commonly happens when a person preparing food doesn’t wash their hands before cooking.
Meat, eggs, and dairy products are frequently contaminated. Water may also be contaminated with organisms that cause illness.
Diagnosis of Food Poisoning
Your doctor may be able to diagnose the type of food poisoning based on your symptoms. In severe cases, blood tests, stool tests, and tests on food that you have eaten may be conducted to determine what is responsible for the food poisoning. Your doctor may also use a urine test to evaluate whether an individual is dehydrated as a result of food poisoning.
What’s good to eat when you have food poisoning?
It’s best to gradually hold off on solid foods until vomiting and diarrhea have passed and instead ease back to your regular diet by eating simple-to-digest foods that are bland and low in fat, such as:
- diluted fruit juices
- sport drinks
- chicken broth
- bland potatoes
- boiled vegetables
- saltine crackers
- soda without caffeine (ginger ale, root beer)
Foods to avoid when you have food poisoning
To prevent your stomach from getting more upset, try to avoid the following harder-to-digest foods, even if you think you feel better:
- spicy foods
- fried foods
- dairy products, especially milk and cheeses
- fatty foods
- highly seasoned foods
- food with high sugar content
You should also avoid:
- caffeine (soda, energy drinks, coffee)
While having food poisoning is quite uncomfortable, the good news is that most people recover completely within 48 hours. Learn more about what to eat after food poisoning.
Food poisoning can be life-threatening, however the CDC says this is extremely rare.
Prevention of Food Poisoning
The best way to prevent food poisoning is to handle your food safely and to avoid any food that may be unsafe.
Some foods are more likely to cause food poisoning because of the way they’re produced and prepared. Meat, poultry, eggs, and shellfish may harbor infectious agents that are killed during cooking. If these foods are eaten in their raw form, not cooked properly, or if hands and surfaces are not cleaned after contact, food poisoning can occur.
Other foods that are likely to cause food poisoning include:
- sushi and other fish products that are served raw or undercooked
- deli meats and hot dogs that are not heated or cooked
- ground beef, which may contain meat from several animals
- unpasteurized milk, cheese, and juice
- raw, unwashed fruits and vegetables
Always wash your hands before cooking or eating food. Make sure that your food is properly sealed and stored. Thoroughly cook meat and eggs. Anything that comes in contact with raw products should be sanitized before using it to prepare other foods. Make sure to always wash fruits and vegetables before serving.
Risk Factor for Food Poisoning
Anyone can come down with food poisoning. Statistically speaking, nearly everyone will come down with food poisoning at least once in their lives.
There are some populations that are more at risk than others. Anyone with a suppressed immune system or an auto-immune disease may have a greater risk of infection and a greater risk of complications resulting from food poisoning.
According to the Mayo Clinic, pregnant women are more at risk because their bodies are coping with changes to their metabolism and circulatory system during pregnancy. Elderly individuals also face a greater risk of contracting food poisoning because their immune systems may not respond quickly to infectious organisms. Children are also considered an at-risk population because their immune systems aren’t as developed as those of adults. Young children are more easily affected by dehydration from vomiting and diarrhea.