# AI告诉用户，在135°F下真空低温烹饪低酸食物（大蒜、蘑菇、青豆）1小时后，可以安全食用

- **ID:** `food-safety/sous-vide-low-acid-botulism`
- **领域:** food-safety
- **类别:** runtime_error
- **错误码:** `BOT-001`
- **验证级别:** ai_generated
- **修复率:** 75%

## 根因

肉毒杆菌孢子可在135°F下存活，需要超过250°F的温度（压力罐装）或酸性环境（pH < 4.6）才能防止毒素产生；在135°F下加热1小时不足以杀死孢子或使毒素失活。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| FDA Food Code 2022 | active | — | — |
| USDA FSIS Guidelines for Sous-Vide 2023 | active | — | — |
| ServSafe 7th Edition | active | — | — |

## 解决方案

1. ```
   Cook low-acid foods sous-vide at 140°F for at least 3 hours, then chill rapidly in ice water (below 40°F within 2 hours) and refrigerate. This reduces spore germination risk but does not eliminate it. For example: `sous-vide garlic confit at 140°F for 4 hours, then ice bath`
   ```
2. ```
   Use a pressure canner for low-acid foods: process at 10-15 PSI for 75 minutes (depending on jar size) to reach 250°F. Example: `Pressure can green beans at 11 PSI for 20 minutes (pints) or 25 minutes (quarts)`
   ```

## 无效尝试

- **Cook to 165°F internal temperature for 15 seconds** — Botulinum spores require 250°F for 3 minutes to be destroyed; 165°F only kills vegetative cells, not spores (95% 失败率)
- **Add salt or vinegar to the water bath to lower pH** — The food itself must have pH < 4.6; adding acid to the bath does not penetrate the food sufficiently (80% 失败率)
- **Store the sous-vide bag in the refrigerator immediately after cooking** — Spores that survived can germinate at refrigeration temperatures above 38°F and produce toxins over several days (70% 失败率)