Chlamydial infection.
D000818:Animals; D001715:Bird Diseases / Q000635:transmission*; D001717:Birds; D002690:Chlamydia Infections / Q000517:prevention & control / Q000635:transmission / Q000662:veterinary*; D002691:Chlamydophila psittaci; D006801:Humans; D009956:Psittacosis / Q000517:prevention & control / Q000635:transmission / Q000662:veterinary*; D015047:Zoonoses