Which organism is associated with gastroenteritis from unpasteurized dairy products and ready-to-eat deli meats?

Prepare for the Alimentary Bacteriology Test. Utilize flashcards and multiple choice questions, complete with hints and explanations. Ensure your success on the exam!

Listeria monocytogenes is the organism most classically linked to gastroenteritis from unpasteurized dairy products and ready-to-eat deli meats. It’s capable of growing at refrigeration temperatures and survives well in cold, processed foods, which makes deli meats and unpasteurized dairy particularly risky. In healthy people it often causes mild gastroenteritis, but it can be severe or invasive in pregnant women, newborns, older adults, and immunocompromised individuals. This combination of food sources and the ability to persist in cold, prepared foods is what sets Listeria apart from the others, which are more typically associated with different foods or conditions (for example, Campylobacter with poultry and unpasteurized milk, Salmonella with eggs and poultry, and certain E. coli strains with undercooked beef).