Özet:

 In this study forty (40) cases of outdoor aviary chickens from veterinary teaching hospital at University of Mosul. Gross lesions of Kidneys revealed 15% congestion of kidney, 10% from these cases was pale in color, 30% suffered from enlargement and congestion in the kidney, 25% from these cases showed enlargement and congestion and hemorrhage. The histological examination of the kidney show congestion in the blood vessels, also in other cases necrosis in glomerular renal tuft, while In the other histological sections cases show swelling and degeneration of epithelial cells that lead to narrowing the lumen of the renal tubule, in some cases showed infiltration of inflammatory cells (mononuclear cells), in additional there was another change represented necrosis and shrinking of renal glomeruli.

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