{
  "id": "food-safety/ai-says-canned-tuna-is-safe-after-opening-if-refrigerated-for-a-week",
  "signature": "AI tells a user that opened canned tuna can be safely stored in the refrigerator for up to 7 days",
  "signature_zh": "AI告诉用户，打开的罐头金枪鱼可以在冰箱中安全存放长达7天",
  "regex": "(?i)(opened.{0,10}canned.{0,10}tuna|canned.{0,10}tuna.{0,10}refrigerat).{0,40}(7|week|safe|ok)",
  "domain": "food-safety",
  "category": "health_risk",
  "subcategory": null,
  "root_cause": "Once a can is opened, the sterile environment is broken and bacteria from the air and utensils can contaminate the tuna; FDA and USDA recommend consuming opened canned tuna within 3-5 days maximum, as histamine-producing bacteria can multiply and cause scombroid poisoning.",
  "root_cause_type": "generic",
  "root_cause_zh": "一旦罐头打开，无菌环境被破坏，空气中的细菌和工具可能污染金枪鱼；FDA和USDA建议打开的罐头金枪鱼最多在3-5天内食用，因为产生组胺的细菌可能繁殖并导致鲭鱼中毒。",
  "versions": [
    {
      "version": "FDA Refrigerator Food Storage Chart 2023",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "USDA FoodKeeper App 2024",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Scombroid toxin (histamine) is odorless and tasteless; bacteria that produce it may not cause spoilage odors. The tuna may smell fine but still cause poisoning.",
      "fail_rate": 0.95,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Even with proper container and temperature, histamine-producing bacteria can grow slowly at refrigeration temperatures; 7 days exceeds safe limits.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "After opening canned tuna, transfer unused portion to a clean, airtight container and refrigerate at 40°F (4°C) or below. Consume within 3 days. For longer storage, freeze the tuna in a freezer-safe bag for up to 3 months.",
      "success_rate": 0.9,
      "how": "After opening canned tuna, transfer unused portion to a clean, airtight container and refrigerate at 40°F (4°C) or below. Consume within 3 days. For longer storage, freeze the tuna in a freezer-safe bag for up to 3 months.",
      "condition": "",
      "sources": []
    },
    {
      "action": "Use opened canned tuna immediately in recipes that will be cooked (e.g., tuna casserole, tuna melt) to kill any bacteria; do not store the cooked dish for more than 3-4 days.",
      "success_rate": 0.85,
      "how": "Use opened canned tuna immediately in recipes that will be cooked (e.g., tuna casserole, tuna melt) to kill any bacteria; do not store the cooked dish for more than 3-4 days.",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "After opening canned tuna, transfer unused portion to a clean, airtight container and refrigerate at 40°F (4°C) or below. Consume within 3 days. For longer storage, freeze the tuna in a freezer-safe bag for up to 3 months.",
    "Use opened canned tuna immediately in recipes that will be cooked (e.g., tuna casserole, tuna melt) to kill any bacteria; do not store the cooked dish for more than 3-4 days."
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.fda.gov/food/buy-store-serve-safe-food/refrigerator-thermometers-cold-food-storage-charts",
  "official_doc_section": null,
  "error_code": "FDA-SCOMBROID-004",
  "verification_tier": "ai_generated",
  "confidence": 0.85,
  "fix_success_rate": 0.8,
  "resolvable": "true",
  "first_seen": "2024-09-05",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}