Not all bacteria are bad for you, we need them in our gut to help digest our food properly and we can use some species to produce useful things like antibiotics. As for the species that cause horrible disease, I’d happily see them eradicated.
Some bacteria can definitely be good for you- we have ~100 trillion bacteria in our guts, and this bacteria is very important in helping us digest food.
nope they are all just doing there thing of feeding and reproducing. Sometimes this occurs ona dn in us so we are the food source and that can be harmful either through damge to us from the bacteria or from our immune system trying to clear the bacteria
at any rate without bacteria no material would ever rot, no grass could be digested and much less CO2 would be fixed out of the air. ( to say nothing of no chocoalte, coffee or insuling for medical use)
no the bacteria in the gut is essential to our digestion and keeping oursleves helathy. When we take antibiotics this gets rid of a lot of good bacteria as well as bad bacteria and sometimes this leads to another infection, like a yeast infection.
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