There are many food borne illnesses. People typically just refer to them as food poisoning. These are any illness which happens because of a food or drink that is rotten or contaminated with some type of bacteria or other active pathogen.
Food poisoning is commonly divided into two types. The first is when it’s caused by an infectious agent. The second is when a toxic agent causes the infection. Food poisoning is not really poison. It’s instead contaminated food that has bacteria, prions, parasites of viruses contaminating the food in question. However, it’s easier to group everything into the simple colloquial name.