What are potential sources of Staphylococcus aureus infections?

• A. Pastries, custards
• B. Fresh lettuce
• C. Canned beans
• D. Boiled eggs

Answer: (A)

Foods that commonly cause Staphylococcus aureus food poisoning are those prepared in advance and left at room temperature, allowing the bacteria to multiply and produce enterotoxins. Pastries and custards fit this pattern well because they often contain dairy or cream and are kept out for serving or cooling, creating ideal conditions for toxin production. The toxin formed can survive heating, so reheating doesn’t reliably prevent illness if the food was contaminated and left out too long.

Fresh lettuce is more typically associated with other pathogens and modes of contamination, not the classic Staph enterotoxin scenario. Canned beans have been processed and sealed in a way that minimizes Staph growth and toxin formation. Boiled eggs aren’t a typical primary source unless they’re involved in a salad or dish left out unrefrigerated with other ingredients that support toxin production.