A microbe usually does not cause an infection.The microbe is:
A) A non-pathogen
B) A pathogen
C) Normal flora
D) A spore

Question

Quizplus · Accepted Answer

A microbe that does not cause an infection is a non-pathogen. Non-pathogens are usually harmless or even beneficial to the host, and may even compete with pathogenic microbes for resources.

Option B is incorrect as pathogens are microbes that are capable of causing disease in a host. Option C is incorrect as normal flora is a type of commensal non-pathogenic microbe that is present on or within a host, and may confer benefits such as aiding in digestion or preventing colonization by harmful pathogens. Option D is incorrect as spores are a type of reproductive structure formed by some microbes, and are not directly related to causing or preventing infections.

A Microbe Usually Does Not Cause an Infection