A particular microorganism may be commensal in one body site but parasitic in another body site.

Question

Quizplus · Accepted Answer

The relationship between microorganisms and their host can vary depending on the body site, with some microorganisms acting as commensals (living on the host without causing harm) in one location while potentially becoming parasitic (causing harm to the host) in another, due to differences in the local environment, immune response, or microbial competition.

A Particular Microorganism May Be Commensal in One Body Site