Which of the Following Statements About the Relationship Between Hosts

Question

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.

Accepted Answer

Some organisms can be pathogens and commensals, meaning they can cause disease in some circumstances but also have a normal, non-harmful relationship with their host in other circumstances.