eli5 why does E-coli is in our digestive system even though it’s dangerous

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Okay so of course everyone know what E-coli is, it’s a bacteria that can cause food poisoning. But a few years ago in biology class I realized it’s also a microbe in our gut system. So how does something that’s dangerous live inside our gut without affecting us?

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Anonymous 0 Comments

It’s harmless if it stays where it is I.e the gut but can cause problems if it goes elsewhere such as the urethra which causes about 90% of urine infections

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