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Abstract
This study was carried out at Faculty of Agriculture Experimental Research Station to assess and evaluate the integrated physiological, blood biochemical profile, immunological and productive performance of Barki ram lambs under salinity or heavy heat stress either alone or in combination in Egypt. In addition, to investigate the functions and histopathological examination of both liver and kidney as good indicators of animal health. Twenty growing Barki ram lambs (10- 12 months old and 35 kg average live body weight) were randomly assigned into two equal groups (10 each). The 1st group drank tap water (TWG, 275ppmTDS) and served as control. The 2nd group drank salty water (SWG) contains 2886 ppm TDS, on average. Results indicated that the lowest drinking water intake was observed in SWG. Blood biochemical analysis indicated that SWG had lower values of PCV, TP, Glb, A/G ratio, Glu, T3, T4, and higher values of creatinine, AST, ALT, K+ and cortisol. Moreover, salinity in water tended to decrease Alb, TL, TG and increase Na+, Ca++, Mg++, Cl-, T4 and Ald than that found in TWG. The histological study showed that there was no histopathological alterations in the liver and kidney of TWG, while there was fibrosis with inflammatory cells infiltration in the liver of SWG, and there was congestion in the cortical blood vessels associated with inflammatory cells in the kidney of SWG. In addition, swelling was noticed in lining endothelium of the glomerular tuft with fibrosis and hemorrhages between the degenerated tubules