[Opportunistic infection].
D000293:Adolescent; D000328:Adult; D000368:Aged; D001442:Bacteroides Infections / Q000382:microbiology; D002177:Candidiasis / Q000382:microbiology; D004352:Drug Resistance, Microbial; D005260:Female; D006801:Humans; D007239:Infections / Q000382:microbiology*; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000150:complications; D011552:Pseudomonas Infections / Q000382:microbiology; D018805:Sepsis / Q000382:microbiology