Bacteria are small organisms that multiply quickly, and they can be either a good or bad thing when it comes to health and food. When you eat yogurt, for example, the healthy bacteria contained therein can benefit your digestive tract.

You can get food poisoning from eating contaminated lettuce. Lettuce is grown outdoors and may manufactures sell lettuce “as is.” It is your responsibility to wash the lettuce before using it for consumption. Food poisoning occurs when you eat food that is contaminated with an infectious organism, such as listeria.

When food becomes contaminated, it has the potential to make you sick. Depending on the source and level of contamination, the effects of contaminated food can cause symptoms such as cramps, nausea, diarrhea, vomiting, nerve damage, allergies and paralysis.

Something besides you loves to eat your food and drink your drinks: bacteria and viruses. When it comes to milk, leaving milk outside the refrigerator all day can contribute to food poisoning if your child drinks it.

Food poisoning causes several symptoms including diarrhea, vomiting, stomach cramps and sometimes a fever or headache. The illness is caused by eating food or consuming beverages that have been contaminated with a bacteria or other toxin, the University of Maryland Medical Center (UMMC) explains.

While meat-loving foodies may swoon for steak tartare or yukhoe, eating raw beef dishes like these or even rare cooked beef can potentially make you very sick. Food poisoning can occur if the raw or undercooked beef is contaminated with a disease-causing organism.

Pesticides, which are any substance intended to prevent or destroy pests, are used to protect food from bacteria, weeds, mold, insects and rodents.

According to the Mayo Clinic, 75 million people get food poisoning each year, which occurs when food that has not been properly cooked is consumed. Subsequently, bacteria is ingested, upsetting the digestive environment in your stomach.

Food poisoning from raw fish occurs when you consume raw fish that has become too warm before serving or been contaminated with an infectious organism—a virus, parasite or bacterium—or a toxin from an infectious organism.

Diatomaceous earth is a chalky natural sediment. It is available in food-grade forms and approved for use in the manufacturing and processing of many common food products. The International Programme on Chemical Safety reports no toxic effects from ingestion.

Catfish makes regular appearances in many Americans' diets, and serves as a good source of omega-3 fatty acids, an important fatty acid for the body.

Food poisoning, also known as food borne illness, occurs after you consume food that has been contaminated before or during its preparation.