Abstract

In this study seventy case of dead layers from daily mortalities of farm were inspected and in different production stages. 33 cases suffered from renal pathological lesions distributed as 3 cases in preproduction stages, 24 cases in peak of production and 6 cases at the end of production, the most cases reported in the peak of production. These lesions were variable from visceral gout that characterized grossly by precipitation of urate salts to enlargement of kidney with congestion, other cases show enlargement of kidney with hemorrhage on the cortex, also there is enlargement of kidney with pale colour. Histological examination of kidney show swelling and degeneration of epithelial cell of renal tubules (Nephrosis) that leading to stenosis of blood vessels and infiltration of inflammatory cell (Mononuclear cell), in addition to desquamation of epithelial cell of renal tubules with present of dilation of some renal tubules and hemorrhage in the interstitial tissue of kidney. Other cases show necrosis in epithelial cell of renal tubules and necrosis of glomerular renal tuft, while other cases show sever lesion represented by severe congestion in blood vessels with necrosis and desquamation of epithelial cell of renal tubules in addition to shrinking of glomerular tuft and dilation of bowman's space and severe infiltration of inflammatory cell within renal tubules and some renal glomerulus's suffering from necrosis. Also there were in some cases precipitation of urate salts in the lumen of renal tubules and these cases located mostly in peak of production.