The smaller the number of microorganisms necessary to cause infection in a competent host,the more _____ the microorganism.

Question

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Opportunistic refers to a type of resident flora that causes infection when the conditions in a host change.A parasitic infection occurs when an organism invades a host and only the organism benefits from the biologic relationship.Invasive refers to entering tissue,not the degree of ease with which an organism can cause disease.Virulence refers to the relative ability of a microorganism to cause disease-more virulent organisms need fewer organisms to cause disease in a host.

The Smaller the Number of Microorganisms Necessary to Cause Infection