Salmonella Typhi (which causes typhoid fever) differs from nontyphoidal Salmonella mainly because it:
a.Is excluded from the Big 6 because it is rarely dangerous
b.Is carried only by cattle and poultry that shed it into raw meat
c.Lives only in humans and is spread by infected food handlers
d.Is destroyed by refrigerating ready-to-eat food at 41°F or below
Giải thích
Salmonella Typhi lives only in humans — there is no animal reservoir — and it spreads when an infected food handler contaminates food or drink, which is why that worker is excluded until a medical release clears them. It is one of the Big 6 reportable pathogens precisely because typhoid fever is severe. Refrigerating at 41°F slows bacterial growth but destroys nothing, and typhoid fever is a human disease, so cattle and poultry are not its source.
Luyện miễn phí toàn bộ 500 câu hỏi — không cần đăng ký.
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Câu hỏi liên quan cùng chủ đề
- A guest becomes ill after eating raw oysters and reports jaundice weeks later. Which of the Big 6 pathogens is a virus most associated with contaminated shellfish and infected food handlers?
- Norovirus outbreaks spread rapidly in restaurants. What is the most effective way for a manager to prevent Norovirus transmission from staff?
- A prep cook slices deli meat and then handles lettuce for salads without washing hands. Nontyphoidal Salmonella is most commonly associated with which foods?
- Shigella is most often transmitted in food establishments through:
- Shiga toxin-producing E. coli (STEC), such as E. coli O157:H7, is most strongly associated with which food?
- Which populations are considered highly susceptible (high-risk) to foodborne illness and should be given extra protection?
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