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Contamination & Pathogens

Botulism

A rare but serious paralytic illness caused by toxins produced by the bacterium Clostridium botulinum, often associated with improperly canned foods.

What It Means

Botulism is a rare but potentially fatal paralytic illness caused by nerve toxins produced by the bacterium Clostridium botulinum. Foodborne botulism occurs when a person ingests food containing the preformed botulinum toxin, which is one of the most potent biological toxins known to science. The toxin attacks the nervous system, causing muscle paralysis that can affect breathing and lead to death if untreated. Symptoms typically appear 12 to 36 hours after consuming contaminated food and include double vision, blurred vision, drooping eyelids, slurred speech, difficulty swallowing, dry mouth, and progressive muscle weakness that descends from the shoulders to the extremities. Foodborne botulism is most commonly associated with improperly home-canned foods, particularly low-acid foods such as green beans, corn, beets, and asparagus. However, commercial food products have also been subject to botulism-related recalls when manufacturing defects compromise the hermetic seal or thermal processing of canned or vacuum-packed foods. C. botulinum thrives in low-oxygen environments and is resistant to boiling in its spore form, requiring pressure canning at 250 degrees Fahrenheit to destroy. Botulism risk in commercial foods typically triggers a Class I recall because of the severity and potential lethality of the illness. The FDA maintains strict regulations on thermal processing of low-acid canned foods and acidified foods to prevent botulism.

Related Terms

Frequently Asked Questions

What does Botulism mean?

A rare but serious paralytic illness caused by toxins produced by the bacterium Clostridium botulinum, often associated with improperly canned foods.

Why is Botulism important for food safety?

Botulism is a rare but potentially fatal paralytic illness caused by nerve toxins produced by the bacterium Clostridium botulinum. Foodborne botulism occurs when a person ingests food containing the preformed botulinum toxin, which is one of the most potent biological toxins known to science. The to...

this entity is one of the U.S. FDA food, drug, and device recalls concepts that recurs across this site. The definition above is the technical answer; the paragraphs below add the practical context for how the concept connects to the the FDA openFDA enforcement-report API data behind every per-entity page on the site.

In the the FDA openFDA enforcement-report API data, this concept shapes one or more of the fields that drive the per-entity grades and rankings on this site. The methodology page describes which fields feed into which output; this glossary entry documents the underlying term.

Source: FDA Recalls, Market Withdrawals and Safety Alerts, 2026.