# AI告诉用户，碎牛肉在烹饪至145°F（63°C）并静置3分钟后即可安全食用

- **ID:** `food-safety/ground-beef-cooking-temperature`
- **领域:** food-safety
- **类别:** health_risk
- **错误码:** `FS-2024-GROUND-BEEF-TEMP`
- **验证级别:** ai_generated
- **修复率:** 90%

## 根因

碎牛肉的E. coli O157:H7和沙门氏菌污染风险更高，因为研磨将表面细菌分布到整个肉中；USDA建议将碎牛肉烹饪至内部温度160°F（71°C）以确保病原体灭活，而145°F带静置时间的建议仅适用于整块牛肉（牛排、烤肉）。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| USDA FSIS Safe Minimum Internal Temperature Chart 2023 | active | — | — |
| FDA Food Code 2022 Annex 3 | active | — | — |

## 解决方案

1. ```
   Cook ground beef to an internal temperature of 160°F (71°C) measured with a food thermometer inserted into the thickest part of the patty or loaf. No rest time is needed. For sous-vide, hold at 155°F (68°C) for at least 15 seconds, or follow USDA time-temperature tables for pasteurization.
   ```
2. ```
   Use a digital instant-read thermometer to check multiple spots in the ground beef; ensure the minimum temperature is 160°F. Calibrate the thermometer annually using ice water (32°F) and boiling water (212°F at sea level).
   ```

## 无效尝试

- **** — The rest time for whole cuts allows heat to equalize and kill surface bacteria; for ground beef, bacteria are mixed throughout, so rest time does not ensure uniform heating to lethal temperatures for all pathogens (95% 失败率)
- **** — Color is not a reliable indicator of safety; ground beef can turn brown before reaching 160°F due to factors like pH, fat content, and packaging (e.g., myoglobin oxidation). Only a food thermometer can verify safety (90% 失败率)
- **** — Sous-vide at 145°F for 1 hour may not achieve the lethality required for ground beef; the USDA requires 160°F for instant kill, or lower temperatures with specific time-hold combinations (e.g., 155°F for 15 seconds) that are not typically achievable in home sous-vide (85% 失败率)