| Abstract: |
A total of 492 pigeons were collected from seven different districts atSharkia govemorate during a year of investigation (from June 2003 to May2004). The collected samples were subjected to clinical, postmortem, andparasitological examination at the Department of Avian and Rabbit Medicine,Faculty of Vet. Med., Zagzig University. The investigations revealed that 279 out of 492 (56.7%) examined pigeons were positive to T. gallinae infection. The incidences of infectiosquabs respectively. Seasonally the highest incidence of infection was 75% in spring season in squabs, while the lowest incidence were recorded in adultmale in summer season (37.040/0).In vitro cultivation of T. gallinae in four different synthetic mediarevealed that the highest parasites number was 550/ml, 5001 ml, 400/ml, and3501 ml at 48h. p.I, when propagated on Glucose - broth -serum medium,Diamond’s medium, Beef extract- glucose- peptone- senun me dium , andSimplified- Trypticase- senun medium respectively. The result of experimental infection revealed that a high percentage of infection in pigeon squabs ranged between 70 %- 88.9 %. The tested birds showed typical symptoms and postmortem lesion of TrichomoniThe incubation period was 12 days.The invasiveness of Trichomoniasis in experimentally infected pigeonsquabs reached up to 100% in buccal cavity, oesophagus, and crop, theinvasion were 50% The haemotological studies revealed Macrocytic hypochromic anaemia in inoculated squabs at 21 st day post infection. lymphocytosis, heterophilia, esinophilia and monocytosis were observed in experimentally infected squabsat 14th day and 21 st day post infection.
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