الفهرس | Only 14 pages are availabe for public view |
Abstract 85 isolates of Pa0 aeruginosa were detected from 450 dead (Faycumi) chicken—embryos collected from Governornental and balady hatcheries at Kena Province, in additon 75, 20 isolates of the same organism were recovered 400, 100 samples of baby—chicks and older chickens respectively0 The samples were obtained from different Governomental farms, Pathogenicity tests in 7—days old clncken-.embryos by yolk~sac inoculation or dipping on broth—culture of Pa. aeruginosa proved that the organism was highly pathogenic, with nortality rate varied from 80—to 100 %. The experimental infection in 3—days old chicks by different doses, revealed that the subcutaneous route of inoculation was highly effective with mortality percent varied from 13.32 to 100 %, while oral route and intra — nasal infections were almost similar and the mortality rate ranged from 0 and 6.6 %. Reisolation of the inoculated organism, and the macro and microscopic examin4tions of the dead embryos, and chicks were conducted, In vitro sensitivity test of the isolated ~ ~~g~nosa revealed that the isolates were sensitive to Garamycin, treptomycin, Ghloramphenicol, Colistin, Anikin and Neomycin. Moderate degree of sensitivity was reported against Nitrof— urantion, Sulpha,methoxazole—trimethobrim, Qefoxtin, and liqLcomycin, while the tested isolates were either week sensitive or complete resistant to Oleandomycin, Oxytet. racycline, Erythromycin, Ampicillin and Penicillin. |