The ability of a nonpathogen or weakly pathogenic microorganism to cause disease primarily in an immunocompromised host is termed Opportunism infection.
In contrast to nonpathogenic bacteria, which do not infect or harm other living things, pathogenic bacteria are those that can cause diseases.
An opportunist is an organism that can draw its sustenance from a variety of sources, but when favorable circumstances present themselves, the organism quickly seizes the chance to flourish.
A class of microorganisms known as opportunistic pathogens cause infections in hospitals, in immunocompromised patients, or in patients with underlying disorders like cystic fibrosis, which promotes infection (Koch and Hoiby, 1993).
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