Food poisoning is an illness that occurs when food becomes contaminated with any number of bacteria, viruses, or parasites. Food can become contaminated during food preparation, food storage, or while being eaten. The symptoms of food poisoning are not always clear and may vary depending on the type of contaminant. Nevertheless, food poisoning often includes nausea, vomiting, and diarrhea. There are many different types of food poisoning which include chemical contamination (toxic substances), bacterial infection (salmonella), and parasitic infections (giardia). Please read on to learn more about food poisoning, its symptoms, and how to treat it.