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Abstract

Trichomonas gallinae in budgerigars and columbid birds in Perth, Western Australia.

Abstract

The prevalence of T. gallinae and other alimentary parasites was examined in 427 psittacine and 130 columbid birds in Perth, Australia, [date not given]. Samples of crop contents were collected from aviary flocks of budgerigars (Melopsittacus undulatus) and other columbid birds in both private and commercial collections and from wild Senegal doves (Streptopelia senegalensis) and racing pigeons. The prevalence of T. gallinae infection in budgerigars ranged from 0 to 11.4%. The prevalence of T. gallinae infection in wild Senegal doves and racing pigeons was 46% and 59%, respectively. The minimum lethal concentrations of metronidazole, dimetridazole and ronidazole ranged from 40 to 96, 30 to 80 and 40 to 92 µg/ml, respectively, for 6 isolates of T. gallinae. Other alimentary parasites detected during the survey included Spironucleus spp. (Hexamita spp.), coccidia, Ascaridia platycerci and Raillietina spp. 13 budgerigar flocks belonging to members of avicultural societies had a low prevalence of trichomoniasis and other parasitic infections. It is concluded that the currently recommended dose of ronidazole may not be sufficient for full protection against T. gallinae.