What Is the Difference Between a Primary Pathogen and an Opportunistic

Multiple Choice

What is the difference between a primary pathogen and an opportunistic pathogen?

A) A primary pathogen is a microbe that is able to cause disease in an otherwise healthy individual, while an opportunistic pathogen is a microbe that causes disease only when introduced into an unusual location or into an immunocompromised host.
B) An opportunistic pathogen is a microbe that is able to cause disease in an otherwise healthy individual, while a primary pathogen is a microbe that causes disease only when introduced into an unusual location or into an immunocompromised host.
C) A primary pathogen is an environmental microbe that is able to cause disease in an otherwise healthy individual, while an opportunistic pathogen is always a member of the normal microbiota and causes disease only when introduced into an unusual location.
D) A primary pathogen is an environmental microbe that is able to cause disease in an otherwise healthy individual, while an opportunistic pathogen is always a member of the normal microbiota and only causes disease in an immunocompromised host.
E) A primary pathogen is a microbe that is able to cause disease in an otherwise healthy individual, while opportunistic pathogens are the microorganisms routinely found growing in and on the body of a healthy individual.