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A member asked:
Can listeria develop on spoiled food that wasn't previously infected, or does it have to have already been present before the spoilage occurred?
A doctor has provided 1 answer
It has to already: Have been present within the food or contaminated from outside source. It will not show up spontaneously, but food can be contaminated by accident without users knowing specifically whether it was contaminated or not. Hope that helps a little!
Answered 9/28/2016
4.5k views
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