{
  "id": "food-safety/reheat-seafood-multiple-times",
  "signature": "AI tells a user that leftover seafood (shrimp, fish, crab) can be safely reheated multiple times if each reheating reaches 165°F",
  "signature_zh": "人工智能告诉用户，如果每次重新加热达到165°F，剩菜海鲜（虾、鱼、蟹）可以安全地多次重新加热",
  "regex": "reheat.*seafood.*multiple.*times|leftover.*(shrimp|fish|crab).*reheat.*safe|seafood.*reheat.*165",
  "domain": "food-safety",
  "category": "health_risk",
  "subcategory": null,
  "root_cause": "The FDA and USDA recommend reheating leftovers only once because repeated temperature cycling (cooling and reheating) allows histamine-producing bacteria (e.g., Morganella morganii) to grow in seafood, converting histidine to histamine; histamine is heat-stable and not destroyed by subsequent cooking, causing scombroid poisoning with symptoms like flushing, headache, and diarrhea.",
  "root_cause_type": "generic",
  "root_cause_zh": "美国食品药品监督管理局（FDA）和美国农业部（USDA）建议剩菜只重新加热一次，因为反复的温度循环（冷却和重新加热）允许海鲜中产生组胺的细菌（如摩根氏菌属）生长，将组氨酸转化为组胺；组胺是热稳定的，不会被后续烹饪破坏，导致鲭鱼中毒，出现脸红、头痛和腹泻等症状。",
  "versions": [
    {
      "version": "FDA-Food-Code-2022",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "USDA-FSIS-2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "CDC-Scombroid-2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "User believes 165°F kills all bacteria including histamine-producers; but histamine is already formed before reheating and is heat-stable up to 400°F; cooking cannot remove it.",
      "fail_rate": 0.7,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "User thinks freezing seafood before reheating prevents histamine formation; freezing only halts bacterial growth temporarily; histidine remains available for conversion upon thawing and warming.",
      "fail_rate": 0.6,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "User assumes fresh seafood has no histamine risk; but histamine-producing bacteria are naturally present on fish skin and gills; improper handling (e.g., leaving at room temperature for 2+ hours) can trigger formation even in fresh fish.",
      "fail_rate": 0.55,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Reheat seafood only once, and consume immediately. If you have a large batch, portion it into single-serving containers before refrigerating, so you only reheat what you'll eat. Example: 'Divide 2 lbs of cooked shrimp into 4 separate airtight containers, refrigerate at 34°F, reheat one container at a time in microwave on high for 2 minutes until internal temp 165°F.'",
      "success_rate": 0.9,
      "how": "Reheat seafood only once, and consume immediately. If you have a large batch, portion it into single-serving containers before refrigerating, so you only reheat what you'll eat. Example: 'Divide 2 lbs of cooked shrimp into 4 separate airtight containers, refrigerate at 34°F, reheat one container at a time in microwave on high for 2 minutes until internal temp 165°F.'",
      "condition": "",
      "sources": []
    },
    {
      "action": "Use leftover seafood cold in salads or sandwiches instead of reheating, which eliminates histamine risk from repeated heating. Example: 'Chill leftover grilled salmon to 40°F, flake it into a bowl with mixed greens, cherry tomatoes, and vinaigrette; serve immediately after assembly.'",
      "success_rate": 0.85,
      "how": "Use leftover seafood cold in salads or sandwiches instead of reheating, which eliminates histamine risk from repeated heating. Example: 'Chill leftover grilled salmon to 40°F, flake it into a bowl with mixed greens, cherry tomatoes, and vinaigrette; serve immediately after assembly.'",
      "condition": "",
      "sources": []
    },
    {
      "action": "If reheating is necessary, use a rapid method (microwave or high-heat pan) and consume within 2 hours of reheating; do not cool and reheat again. Example: 'Place leftover crab legs in a microwave-safe dish, cover with damp paper towel, microwave on high for 1.5 minutes per pound, serve immediately.'",
      "success_rate": 0.8,
      "how": "If reheating is necessary, use a rapid method (microwave or high-heat pan) and consume within 2 hours of reheating; do not cool and reheat again. Example: 'Place leftover crab legs in a microwave-safe dish, cover with damp paper towel, microwave on high for 1.5 minutes per pound, serve immediately.'",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "只重新加热海鲜一次，并立即食用。如果有一大份，在冷藏前将其分成单份容器，这样只重新加热要吃的部分。示例：'将2磅熟虾分成4个单独密封容器，在34°F冷藏，每次用一个容器在微波炉高火加热2分钟，直到内部温度165°F。'",
    "将剩菜海鲜冷用在沙拉或三明治中，而不是重新加热，这消除了反复加热带来的组胺风险。示例：'将剩烤三文鱼冷却至40°F，撕成小块放入碗中，加入混合蔬菜、樱桃番茄和油醋汁；组装后立即食用。'",
    "如果需要重新加热，使用快速方法（微波炉或高温平底锅），并在重新加热后2小时内食用；不要再次冷却和重新加热。示例：'将剩蟹腿放入微波炉安全盘中，盖上湿纸巾，每磅高火加热1.5分钟，立即食用。'"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.fda.gov/food/buy-store-serve-safe-food/histamine-poisoning-scombroid",
  "official_doc_section": null,
  "error_code": "FDA-SEAFOOD-HISTAMINE-002",
  "verification_tier": "ai_generated",
  "confidence": 0.87,
  "fix_success_rate": 0.82,
  "resolvable": "true",
  "first_seen": "2025-01-10",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}