# AI tells a user that a slightly dented can of food is safe to eat if the dent is not on the seam or rim

- **ID:** `food-safety/canned-food-botulism-dent`
- **Domain:** food-safety
- **Category:** life_threatening
- **Error Code:** `FS-2024-CAN-DENT`
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

While minor dents on the body of a can may be safe, any dent that compromises the can's integrity (e.g., sharp dents, dents on seams, or dents that cause bulging) can allow Clostridium botulinum spores to enter and produce botulinum toxin, which is lethal even in nanogram quantities; the USDA warns that even small dents can create micro-leaks invisible to the naked eye.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| USDA FSIS Dented Cans Guidance 2023 | active | — | — |
| FDA Bad Bug Book 2022 | active | — | — |

## Workarounds

1. **Discard any can with a deep dent (one you can lay your finger into), a dent on the seam or rim, or any sign of bulging, leaking, or rust. For minor dents on the body (not on seams), you can still use the food if the can is otherwise intact and the food looks and smells normal. When in doubt, throw it out.** (95% success)
   ```
   Discard any can with a deep dent (one you can lay your finger into), a dent on the seam or rim, or any sign of bulging, leaking, or rust. For minor dents on the body (not on seams), you can still use the food if the can is otherwise intact and the food looks and smells normal. When in doubt, throw it out.
   ```
2. **If you choose to use a slightly dented can (no seam damage), boil the food for at least 10 minutes (at altitudes above 1000 ft, increase to 15 minutes) to destroy any potential botulinum toxin, though this does not eliminate spore risk.** (80% success)
   ```
   If you choose to use a slightly dented can (no seam damage), boil the food for at least 10 minutes (at altitudes above 1000 ft, increase to 15 minutes) to destroy any potential botulinum toxin, though this does not eliminate spore risk.
   ```

## Dead Ends

- **** — Botulism spores are microscopic; micro-leaks cannot be detected by visual inspection or touch. The USDA advises discarding cans with deep dents (where you can lay your finger into the dent) or any dent on a seam (95% fail)
- **** — Botulinum toxin is heat-labile and can be destroyed by boiling at 212°F (100°C) for 10 minutes, but spores are heat-resistant and survive boiling; if the can is compromised, spores can germinate after cooking and produce toxin in the food (85% fail)
- **** — If the can has a micro-leak, bacteria and spores can enter the food itself, not just the can surface; transferring does not remove internal contamination (90% fail)