Infant ingestion of honey is a documented Botulinum exposure due to spores that colonize the infant gut.

• A. Spores in honey colonize the infant gut
• B. Spores in honey are inactivated by stomach acid
• C. Honey contains botulinum toxin directly
• D. Infants should avoid boiled water

Answer: (A)

Infant botulism occurs when Clostridium botulinum spores are ingested and then colonize the immature infant gut, producing toxin there. Honey can harbor these spores, and in infants the gut environment is not yet fully developed to suppress spore germination and toxin production, allowing the toxin to form in the colon. That is why spores in honey colonizing the infant gut is the best explanation for this exposure. The toxin is not present preformed in honey, stomach acidity in infants isn’t reliably protective against spore germination, and advice about boiled water doesn’t address the actual mechanism of infant botulism.