What type of bacteria, though unknown to Appert, did his long heating process for low-acid foods like meat help defeat?
Answer
Clostridium botulinum
When preserving high-risk, low-acid foods such as meats, the necessary heat treatment required for safety must be intensive and prolonged. Appert discovered this through empirical trial and error, realizing that shorter boiling times were insufficient for these substances. This extended heating inadvertently achieved the sterilization necessary to eliminate deadly anaerobic bacteria, specifically organisms like Clostridium botulinum. While Appert had absolutely no conception of these bacteria or the toxins they produce, his practical diligence ensured his process successfully neutralized the threat they pose to shelf-stable food.

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Nicolas Appert and the Invention of Canning - YouTube
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