Food poisoning is a common illness caused by the consumption of contaminated food or water. Two of the most common causes of food poisoning are ptomaine and E. coli. Ptomaine is a type of bacteria that can be found in spoiled food, and E. coli is a type of bacteria that can be found in undercooked meat, unpasteurized dairy products, and contaminated water. Both of these bacteria can cause severe gastrointestinal symptoms such as nausea, vomiting, and diarrhea. It is important to practice safe food handling and preparation techniques to reduce the risk of food poisoning.