[An approach of infectious disease. Opportunistic infection].
D000293:Adolescent; D000328:Adult; D000368:Aged; D002175:Candida / Q000472:pathogenicity; D003141:Communicable Diseases / Q000276:immunology / Q000382:microbiology*; D005260:Female; D006801:Humans; D007113:Immunity, Innate; D007223:Infant; D008297:Male; D008875:Middle Aged; D011550:Pseudomonas aeruginosa / Q000472:pathogenicity; D012141:Respiratory Tract Infections / Q000382:microbiology; D018805:Sepsis / Q000276:immunology / Q000382:microbiology; D012706:Serratia marcescens / Q000472:pathogenicity