A member asked:

What is the definition or description of: infection?

A doctor has provided 1 answer
Dr. Tony Ho answered

Specializes in Internal Medicine

Invasion: Infections are invasions of some other organism (fungus, bacteria, parasite) or viruses into places where they do not belong. For instance, we have normal gut bacteria that live within us without causing problems; however, when those penetrate the bowel wall and enter the bloodstream, that is an infection.

Answered 3/22/2015

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