الفهرس 
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Abstract
One hundred and fourty of one day old broiler chicks were used and divided equally into four groups each of 35 chicks as follow; basal diet supplemented group(1), zinc oxide (2 g /10 kg ration for 4 weeks) supplemented group(2), sodium selenite (15.4 mg / 10kg ration for 4 weeks) supplemented group (3) and combination group(4).Each week from starting the experiment till the fourth week, blood samples and liver tissue were collected for assessment of hematological, immunological, biochemical and antioxidant status of birds. The results showed
An increase in serum zinc concentration and liver SOD activity increased in chicks treated with zinc alone and in combination with selenium , while serum selenium concentration and GPx activity elevated in chicks treated with selenium alone and in combination with zinc in gps along the experimental period.
Marked increase in the weights of body and internal organs(liver, kidney gizzard, heart, spleen, thymus and bursa ) of chicks in groups 4,3,2 after four weeks of treatment.
No changes were found in RBCs and PCV in chicks of all treated groups after one, two weeks of treatment. At the third and fourth week we found increase in RBCs and PCV in combination group, selenium group then zinc group respectively. No changes were found in Hb concentration in chicks of all treated groups after one, two and three weeks of treatment.