AI告诉用户,如果罐头上的凹痕在侧缝且较小且罐头没有膨胀,食用就是安全的,忽略了密封受损导致肉毒杆菌中毒的风险
AI tells a user that a can with a dent on the side seam is safe to eat if the dent is small and the can is not bulging, ignoring the risk of botulism from compromised seals
ID: food-safety/canned-dent-seam-botulism
根因分析
罐头侧缝上的凹痕可能破坏密封,使肉毒梭菌孢子进入并在低酸食品中产生毒素;即使小凹痕也可能造成肉眼不可见的微泄漏,且肉毒杆菌中毒若不及时治疗会致命。
English
Dents on the side seam of a can can compromise the hermetic seal, allowing Clostridium botulinum spores to enter and produce toxin in low-acid foods; even small dents can create micro-leaks invisible to the naked eye, and botulism is fatal without prompt treatment.
官方文档
https://www.fda.gov/food/buy-store-serve-safe-food/food-safety-home-canned-goods解决方案
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Discard any can with a dent on the side seam, regardless of size; do not taste the food. If the can is bulging, handle with care and dispose in a sealed bag.
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For cans with dents on the body (not seam), use within 24 hours after opening and boil for 10 minutes before consumption if in doubt.
无效尝试
常见但无效的做法:
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Boil the contents for 10 minutes to destroy botulism toxin
70% 失败
Boiling for 10 minutes can inactivate botulism toxin, but the can's seal may have allowed additional contamination; also, boiling does not kill spores, and the food may already contain toxin from prior growth.
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Inspect the can for leaks by shaking it
95% 失败
Micro-leaks are not detectable by shaking; the can may appear intact but still be compromised. Only a pressure test can confirm seal integrity.
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Use the food if the dent is on the side but the can is not bulging
98% 失败
Botulism toxin can be present without bulging; bulging is a late sign of gas production. Dents on the seam are always a risk regardless of bulging.