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Bacillus subtilis and bacillus coagulans

B. subtilis is an obligate aerobe whose spores can survive the extreme heating which is often used to cook food. It is responsible for causing ropiness in spoiled bread. B. coagulans can grow all the way down to pH 4.2 and causes a flat sour taste in contaminated canned food (including acidic foods which normally keeps most bacterial growth to a minimum).


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