FS-PORK-SOUSVIDE-063 food-safety health_risk ai_generated true

AI tells a user that sous-vide pork at 130°F for 4 hours is safe to eat because trichinosis is killed at 137°F

ID: food-safety/sous-vide-pork-trichinosis

Also available as: JSON · Markdown · 中文
88%Fix Rate
90%Confidence
1Evidence
2025-04-22First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
USDA Sous Vide Cooking Guidelines 2023 active — — —
FSIS Trichinella spiralis inactivation data 2022 active — — —

Root Cause

USDA recommends pork be cooked to 145°F with a 3-minute rest, or sous-vide at 130°F for at least 6 hours to achieve 5-log reduction of Trichinella spiralis; 4 hours at 130°F is insufficient, and the AI incorrectly cites 137°F as the kill temperature without considering time.

generic

中文

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。

Official Documentation

https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/trichinosis

Workarounds

  1. 88% success 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`. 
    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. 95% success 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. 
    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.

中文步骤

  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.

Dead Ends

Common approaches that don't work:

  1. Tell user to increase the temperature to 137°F for 1 hour 75% fail

    At 137°F, USDA requires at least 2.5 hours for a 5-log reduction of Trichinella; 1 hour is still insufficient.

  2. Suggest using a higher wattage sous-vide circulator to heat faster 90% fail

    The issue is time at target temperature, not heating rate; a faster circulator does not reduce the required hold time.

  3. Recommend adding salt or vinegar to the pork to kill parasites 85% fail

    Salt and vinegar do not kill Trichinella spiralis at typical concentrations used in sous-vide cooking; only heat is effective.