Discussion
The following statements are true regarding botulism except:
Answer: A
Correct answer: Infant botulism is caused by ingestion of preformed toxin
This is the exception. Infant botulism is a true infection: spores - classically from honey - are swallowed, germinate in a gut whose flora is not yet established, and produce toxin in situ, giving the floppy infant. Classical food-borne botulism is the one caused by preformed toxin. The other three statements are correct: types A, B, E and F cause human disease, the toxin genes of types C and D are carried on bacteriophages, and C. baratii is among the rarer species that can produce botulinum toxin.
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