WebMD contributor Dr. Michael W. Smith says many types of food poisoning are contagious. Although a person usually gets food poisoning from eating contaminated food, it is possible to spread the germs responsible for the illness to another person.
According to WebMD, norovirus, E. coli and salmonella are some of the most common types of contagious food poisoning. Experts from the Center for Disease Control and Prevention say norovirus is "very contagious." Anyone who has vomiting or diarrhea as a result of food poisoning should disinfect the bathroom and other potentially contaminated areas to kill germs, as recommended by Dr. Smith.