Effect of A-Max, Protexin and Virginamycine on Humoral Immune of Broiler Chickens

ABSTRACT: This study compares influence of probiotics, prebiotics and growth-promoter antibiotics on humoral immune of broiler chickens. 400 Ross broiler chickens were selected and divided in a unit of aviculture in faculty of agriculture of Islamic Azad University of Tabriz branch in 4 similar groups each containing 100 chickens. The experiment had 4 replications per each 25 chicken in each group. Experimental group 1 received 150 gr/ton Virginiamycin, group 2 received an average dose of Protexin amounted 100 gr/ton, and group 3 received 3 kg/ton A-Max with base ration but group 4 fed only by base ration. During period of aviculture, 40 chickens were selected randomly from each group on 9th, 24th and 34th days and their blood was sampled. After statistical analysis by spss software, it was observed that there is not any significant difference between amount of antibodies of different groups obtained by HI test on 9th day (2.08 ±0.23 in experimental group 1, 2.03±0.23 in experimental group 2 and 2.03±0.23 in experimental group 3) 24th day of aviculture. While conclusions obtained through HI test on 31th day of aviculture (5.04±0.44 in control group, 5.87±0.44 in in experimental group 1, 5.61±0.44 in experimental group 2 and 5.98±0.44 in experimental group 3) showed an statistical difference between experimental groups 1, 2 and 3 with control group but there was not any differences between three experimental groups of 1, 2 and 3.