Which of the following statements about the relationship between hosts and microbes is true?
A) an opportunistic pathogen has a relatively low infectious dose
B) infection always leads to symptoms
C) some organisms can be pathogens and commensals
D) endogenous infections are caused by microbes that are endemic to environment

Question

Quizplus · Accepted Answer

It is possible for organisms to have both pathogenic and commensal properties. For example, some bacteria that are normally found in the human gut can cause infections if they enter other parts of the body.

A) is false because an opportunistic pathogen may have a high or low infectious dose depending on the specific organism and the host's immune system.

B) is false because not all infections lead to symptoms. Some infections may be asymptomatic or only cause mild symptoms.

D) is false because endogenous infections are caused by microbes that are normally found in the host's own body, not the environment.

Which of the Following Statements About the Relationship Between Hosts