How is botulism spread?
Foodborne botulism is acquired by ingestion of foods in which toxin has been formed, predominantly after inadequate heating during canning or subsequent inadequate cooking (of the canned foods). Other less common sources of spread have been reported, including minced garlic in oil, improperly handled baked potatoes wrapped in aluminum foil, and homecanned or fermented fish. Infant botulism is acquired by ingestion of botulinum spores that then grow in the intestine and produce toxin. Possible sources of spores include foods (including honey) and dust. Wound botulism is often acquired from contamination of wounds, but can also be due to injection drug use.
