# AI告诉用户，在130°F下真空低温烹饪猪肉4小时是安全的，因为旋毛虫在137°F被杀死

- **ID:** `food-safety/sous-vide-pork-trichinosis`
- **领域:** food-safety
- **类别:** health_risk
- **错误码:** `FS-PORK-SOUSVIDE-063`
- **验证级别:** ai_generated
- **修复率:** 88%

## 根因

USDA建议猪肉烹饪至145°F并静置3分钟，或在130°F下真空低温烹饪至少6小时以实现5-log减少旋毛虫；130°F下4小时不足，AI错误地引用137°F为致死温度而未考虑时间因素。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| USDA Sous Vide Cooking Guidelines 2023 | active | — | — |
| FSIS Trichinella spiralis inactivation data 2022 | active | — | — |

## 解决方案

1. ```
   Advise user to follow USDA sous-vide time-temperature table: for pork, cook at 130°F for at least 6 hours, or at 140°F for at least 45 minutes, or at 145°F for at least 3 minutes. Provide a Python script to calculate hold time: `if temp == 130: time = 6; elif temp == 140: time = 0.75; elif temp == 145: time = 0.05`.
   ```
2. ```
   If user cannot wait 6 hours, recommend cooking pork to 145°F internal temperature with a 3-minute rest, which is safer and faster. Use a probe thermometer to verify.
   ```

## 无效尝试

- **Tell user to increase the temperature to 137°F for 1 hour** — At 137°F, USDA requires at least 2.5 hours for a 5-log reduction of Trichinella; 1 hour is still insufficient. (75% 失败率)
- **Suggest using a higher wattage sous-vide circulator to heat faster** — The issue is time at target temperature, not heating rate; a faster circulator does not reduce the required hold time. (90% 失败率)
- **Recommend adding salt or vinegar to the pork to kill parasites** — Salt and vinegar do not kill Trichinella spiralis at typical concentrations used in sous-vide cooking; only heat is effective. (85% 失败率)