opportunistic infection is a noun meaning "any infection caused by a microorganism that does not normally cause disease in humans; occurs in persons with abnormally functioning immune systems (as AIDS patients or transplant patients receiving immunosuppressive drugs)". It carries one recorded sense.
any infection caused by a microorganism that does not normally cause disease in humans; occurs in persons with abnormally functioning immune systems (as AIDS patients or transplant patients receiving immunosuppressive drugs)
Definitions, synonyms and semantic relations for opportunistic infection come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.