The effect of combination of probiotic, lactase enzyme and special antibodies on humoral immunity and histomorphology of lymphoid organs in broiler chickens

The aim of this research has been to determine the effect compound of probiotics, lactase enzyme and antibodies on improving the histomorphology characters of lymphoid organs and improving growth humoral immunity of broiler chickens. For this purpose, 96 broilers (W- Ross 308) have been randomly divided into two groups of 48 with 4 replicates. For evaluation of humoral immunity, samples were selected from each replication randomly at 3rd, 23th and 42th day of production, and cc blood was got from wing vein and HI was tested. For evaluation of histomorphology of lymphoid organs at the end of period, randomly two slaughter samples were selected from each replication has been sent to the histology lab. The results of statistical analysis were shown that rate of antibodies was non significant at -day – old (p>0.05) and it was significant at days and days (p). Microscopic studies of lymphoid organs (Bursa of fabricius, spleen and thymus) were shown significant statistical difference (p