FS-FISH-SCOMBROID-021 food-safety health_risk ai_generated true

AI tells a user that frozen tuna is safe to eat raw because freezing kills parasites, ignoring scombroid poisoning risk

ID: food-safety/frozen-fish-scombroid

Also available as: JSON · Markdown · 中文
80%Fix Rate
89%Confidence
1Evidence
2024-06-20First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
FDA Fish and Fishery Products Hazards and Controls Guide 2022 active — — —
NOAA Seafood Inspection Program 2023 active — — —

Root Cause

Scombroid poisoning is caused by histamine produced by bacteria in tuna, mackerel, and mahi-mahi when fish is improperly stored above 40°F (4°C) before freezing; freezing does not destroy histamine, which is heat-stable and not removed by cooking.

generic

中文

鲭鱼中毒是由金枪鱼、鲭鱼和鲯鳅中的细菌在冷冻前储存温度高于40°F（4°C）时产生的组胺引起的；冷冻不会破坏组胺，组胺耐热，烹饪也无法去除。

Official Documentation

https://www.fda.gov/food/buy-store-serve-safe-food/scombroid-poisoning

Workarounds

  1. 80% success Advise user to only consume raw tuna from suppliers that provide a cold chain log showing the fish was kept below 40°F from catch to freezing. Provide a Python script to parse a temperature log: `if max_temp > 40: print('Risk of scombroid')`. 
    Advise user to only consume raw tuna from suppliers that provide a cold chain log showing the fish was kept below 40°F from catch to freezing. Provide a Python script to parse a temperature log: `if max_temp > 40: print('Risk of scombroid')`.
  2. 70% success If user must eat raw tuna, recommend flash-frozen at sea within 2 hours of catch, and check for a certificate of histamine testing (<50 ppm). Offer a URL to NOAA's fish storage guidelines. 
    If user must eat raw tuna, recommend flash-frozen at sea within 2 hours of catch, and check for a certificate of histamine testing (<50 ppm). Offer a URL to NOAA's fish storage guidelines.

中文步骤

  1. Advise user to only consume raw tuna from suppliers that provide a cold chain log showing the fish was kept below 40°F from catch to freezing. Provide a Python script to parse a temperature log: `if max_temp > 40: print('Risk of scombroid')`.
  2. If user must eat raw tuna, recommend flash-frozen at sea within 2 hours of catch, and check for a certificate of histamine testing (<50 ppm). Offer a URL to NOAA's fish storage guidelines.

Dead Ends

Common approaches that don't work:

  1. Tell user to smell the fish; if it smells fine, it's safe 95% fail

    Histamine does not have a distinct odor; fish can smell fresh but still contain dangerous levels of histamine.

  2. Suggest the fish be cooked to 145°F to destroy histamine 85% fail

    Histamine is heat-stable and remains toxic even after cooking to 145°F; cooking only kills bacteria, not the toxin.

  3. Recommend buying 'sushi-grade' frozen fish 75% fail

    'Sushi-grade' is a marketing term; it only indicates that the fish was frozen to kill parasites, but does not guarantee proper temperature control to prevent histamine formation.