Botulism is a rare but serious illness caused by a toxin that attacks the body's nerves and causes difficulty breathing, muscle paralysis, and even death.
This toxin is made by Clostridium botulinum and sometimes Clostridium butyricum and Clostridium baratii bacteria.
Low-acid foods are the most common sources of botulism linked to home canning.
These foods have a pH level greater than 4.6.
Low-acid foods include most vegetables (including asparagus, green beans, beets, corn, and potatoes), some fruits (including some tomatoes and figs), milk, all meats, fish, and other seafood.
A type of bacteria called Clostridium botulinum produces the toxin.
Botulism can occur as the result of food or wound contamination.
The condition can also occur when bacterial spores grow in the intestines of infants.
In rare cases, botulism can also be caused by medical treatment or bioterrorism.