From the Center for Disease Control: psittacosis in humans in the United States, 1975--1977.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002487:Centers for Disease Control and Prevention, U.S.; D002648:Child; D002675:Child, Preschool; D002691:Chlamydophila psittaci / Q000472:pathogenicity; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009956:Psittacosis / Q000453:epidemiology*; D014481:United States