Effect of adding vitamins A ,E or K to the feed on immune response of broilers

Abstract

bstract The experiment was conducted to study the effect of adding vitamins A,E or K to the rations of broilers on the activity of adenosine deaminas enzyme in cecal tissue extract and blood serum ,the number of oocytes in cecal content , pecked cell volume and protection ratio.Three hundered sixty unsexed day old Faobro chicks were divided into nine treatments with two replicates of 20 chicks each .At ten days of the age the birds vaccination with Eimeria tenella vaccine except the birds in nine treatment and at thirty eight days of the age all the birds gave challenge dose.The results revealed that the addition of vitamins' A,E together in the rations gave significant (P<0.05) increase in the activity of immuno enzyme adenosine deaminas in cecal tissue extract and blood serum , packed cell volume and protection ratio and significant (P<0.05) decrease in the number of oocystes in the cecal content , Vitamin K had not effect on immune response of broilers.