Survey of clinical psittacine bird sera for Salmonella typhimurium agglutinins.

Of 2407 serum samples from various kinds of psittacine birds submitted for Chlamydia serology, 2343 (97.4%) were negative, 25 (1.0%) were equivocal, and 39 (1.6%) were positive for Salmonella typhimurium agglutinins. In additional serum samples from two groups of African gray parrots, the prevalence of agglutinins was 0.0% (0/38) in the Timneh variety and 24.0% (6/25) in the Congo variety. In sera from one macaw, one cockatoo, and one Amazon parrot, which were negative for chlamydial antibody activity, there were strongly reactive agglutinins for S. typhimurium. Two Amazon parrots had antibody activity against Salmonella and Chlamydia antigens.