Name 4 common types of food poisoning.

• A. Staphylococcus aureus, Clostridium perfringens, Bacillus cereus, Norovirus
• B. Viruses, yeasts, moulds, parasites
• C. Allergens, additives, preservatives, flavors
• D. Salmonella, E. coli, Campylobacter, Listeria

Answer: (D)

Food poisoning is most often discussed in terms of specific infectious agents, and the four most commonly tested culprits are Salmonella, E. coli, Campylobacter and Listeria. These four are repeatedly linked to outbreaks and appear in many food hygiene guidelines because they represent a wide range of foods and real-world control challenges.

Salmonella is classicly associated with poultry, eggs, and contaminated surfaces, so proper cooking, separating raw and cooked foods, and thorough cleaning reduce risk. E. coli, particularly pathogenic strains, is commonly linked to undercooked ground beef and contaminated produce, making thorough cooking, good washing of produce, and preventing cross-contamination essential. Campylobacter is a leading cause from poultry and sometimes unpasteurized milk, so similar precautions—cook poultry thoroughly and avoid raw dairy—are crucial. Listeria can grow at refrigerator temperatures and poses serious risk in ready-to-eat products like soft cheeses and deli meats, highlighting the importance of keeping foods properly refrigerated and preventing cross-contamination.

The other options mix broad categories or non-biological factors, which don’t name specific common causes of food poisoning. While viruses such as norovirus are indeed important causes, the four bacteria above are the typical quartet emphasized in this context.