Final answer:
Salmonella is the bacteria responsible for the greatest number of deaths from foodborne illness, with occurrences in a variety of raw and undercooked foods.
Step-by-step explanation:
The species of bacteria responsible for the greatest number of deaths from foodborne illness is Salmonella. Salmonella causes salmonellosis and is found in raw and undercooked meat, poultry, dairy products, and seafood. While other bacteria like E. coli, Listeria, and Camylobacter can cause severe cases of foodborne illnesses, Salmonella is often associated with a higher number of outbreaks and deaths. Cooking food properly and practicing good hygiene can prevent most bacterial foodborne illnesses.