A member asked:

How can bacteria be both good and bad for our health?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

Some are: pathogenic and cause illness. Other's make up part of our normal flora and their absence would cause medical problems (such as an antibiotic stripping out healthy strains of bacteria from the gut).

Answered 6/8/2017

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