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Discussion

Older children and adults are unharmed by the spores in honey because

  • A.they absorb the spores before germination
  • B.the spores cannot survive an adult body temperature
  • C.their established gut flora crowd the spores out
  • D.their stomach acid destroys the spores completely

Answer: C

A mature intestinal microbiota outcompetes Clostridium botulinum so that the spores pass through without colonising. The infant gut has not yet developed that community, which is the whole basis of the age restriction.

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