An outbreak in 2008 linked to Mexican hot peppers (or tomatoes) was due to which organism?

• A. Salmonella Saintpaul
• B. E. coli O157:H7
• C. Listeria monocytogenes
• D. Norovirus

Answer: (A)

Outbreak investigations hinge on identifying the exact pathogen responsible, especially the serotype, to connect illnesses across reports and trace the vehicle. In 2008, a large multi‑state salmonellosis outbreak was linked to fresh peppers imported from Mexico, with peppers (and at times tomatoes) identified as the source. The organism identified in this outbreak was Salmonella enterica serotype Saintpaul, the distinguishing factor that ties all the cases together and points to the contaminated produce as the vehicle. This makes Salmonella Saintpaul the correct answer, since the other organisms are associated with different foods and outbreak patterns: E. coli O157:H7 is often linked to undercooked beef or other specific produce events, Listeria monocytogenes is tied to ready-to-eat and dairy products with different clinical profiles, and Norovirus causes viral gastroenteritis usually linked to shellfish or prepared foods and person-to-person spread.