ملخص الدراسة:

The present study was carried out to explore the status of trichomoniasis of pigeons in Baghdad governorate. A total of 168 domestic pigeons Columba livia domestica from different districts at Baghdad governorate were examined from November 2012 to September 2013. The clinical signs and post mortem gross lesions of naturally infected pigeon male, female and squabs were studied. Grossly, yellowish white focal caseated material wear noticed in the buccal cavity, esophagus, crop and proventriculus and presence of necrotic patches on the liver surface and lungs. Direct examination of crop samples under light microscope revealed that 58.33 % of the examined pigeons were positive for Trichomonas gallinae infection .The incidence of infections among the examined pigeons were 65.45 % , 62.29 % and 46.15% in adult females, adult male and squabs respectively. Seasonally, the highest incidence of infection was 64.1% in spring, 62.4 % in winter, 61.2 % in summer while the lowest incidence was recoreded in autumn (43.2 %).