Listeria monocytogenes is a facultative intracellular Gram-positive coccobacilli responsible for listeriosis, one of the serious food-borne infections.
The causative agent of Bacillary dysentery, Shigella is a member of family Enterobacteriaceae. It is non-motile, non-lactose fermenter.
The most common cause of gastroenteritis worldwide, Campylobacter is a curved, gram-negative rod. It is an oxidase-positive microaerophile.