食源性疾病第 38 / 320 题
A cook wants to know which pathogen has the smallest infectious dose, meaning even a tiny amount can make someone sick. Which of these is known for a very low infectious dose?
a.Bacillus cereus
b.Shiga toxin-producing E. coli and Shigella
c.Clostridium perfringens
d.Staphylococcus aureus
解析
STEC and Shigella are notable for very low infectious doses, so even slight contamination of ready-to-eat food can cause serious illness, which is why handwashing and no bare-hand contact are critical. Clostridium perfringens and Bacillus cereus generally require larger numbers to cause illness, and Staph illness depends on toxin buildup from time-temperature abuse.
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