(n) 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)
The Collaborative International Dictionary of English (GCIDE) v.0.53
adj. 1. taking immediate advantage, often unethically, of any circumstance of possible benefit; practising opportunism. [ wns=1 ] Syn. -- opportunist, timeserving. [ WordNet 1.5 ]
2. (Med.) Causing disease only when the immune system of the host has been weakened, or other damage to the host provides special opportunity for invasion; -- of microorganisms or infectious diseases; as, opportunistic pathogens may infect a burn site; AIDS predisposes a patient to opportunistic infection. [ PJC ]
[shù dǎo hú sūn sàn, ㄕㄨˋ ㄉㄠˇ ㄏㄨˊ ㄙㄨㄣ ㄙㄢˋ, 树倒猢狲散 / 樹倒猢猻散] When the tree topples the monkeys scatter. (成语 saw); fig. an opportunist abandons an unfavorable cause; Rats leave a sinking ship. #104,039[Add to Longdo]
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