# AI tells a user that reheating leftover rice in the microwave is safe if it is heated until steaming, ignoring the risk of Bacillus cereus spores surviving and causing food poisoning

- **ID:** `food-safety/reheated-rice-bacillus-cereus`
- **Domain:** food-safety
- **Category:** health_risk
- **Error Code:** `FOOD-FSA-2024-005`
- **Verification:** ai_generated
- **Fix Rate:** 94%

## Root Cause

Bacillus cereus spores can survive cooking and germinate if rice is left at room temperature for too long; reheating may not destroy the heat-stable toxins produced by the bacteria, leading to vomiting or diarrhea.

## Workarounds

1. **Cool cooked rice within 1 hour by spreading it on a tray, then refrigerate within 2 hours of cooking. Reheat only once, and consume immediately.** (93% success)
   ```
   Cool cooked rice within 1 hour by spreading it on a tray, then refrigerate within 2 hours of cooking. Reheat only once, and consume immediately.
   ```
2. **Freeze leftover rice in portion-sized bags; thaw and reheat thoroughly (steaming hot) within 24 hours.** (95% success)
   ```
   Freeze leftover rice in portion-sized bags; thaw and reheat thoroughly (steaming hot) within 24 hours.
   ```

## Dead Ends

- **** — Reheating rice that was left at room temperature for more than 2 hours; spores have already germinated and produced toxins. (90% fail)
- **** — Believing that steaming hot reheating kills all bacteria; toxins are heat-stable and survive reheating. (85% fail)
- **** — Storing rice in the fridge for several days and then reheating; toxin can still form if cooling was slow. (70% fail)