Chemical food poisoning: Plants or animals that contain a naturally occurring poison fall under the heading of chemical food poisoning.
The common examples are wild mushrooms e.g. amanita phalloides, wild and domestic plants such as yew, nightshade, castor bean, and many others.
Other things that can cause chemical poisoning are fish, shellfish; fruits and vegetables sprayed with insecticide or other chemical can cause chemical poisoning. Chemical food poisoning kills if not detected and attended to on time.