Effects of Garlic on humeral Immune system in broiler chicks

In this study, the effects of different levels of garlic on performance and humoral immunity of broiler chicks were investigated. Three hundred eighty four broiler chicks (Arian) from day one were divided into two groups of male and female. Animals received four treatments diet including: 0.0% (control), 0.1% garlic Powder, 0.1% garlic tablet and 0.5% garlic tablet from day 3 to 42 of age. A factorial design of 2 * 4 was applied for two sex and four treatment diets with four replicates and 12 experimental units. Anti-SRBC titer for direct hem-agglutination assay and for the anti-Newcastle titer the inhibitory hem-agglutination was used. At 42 days, chicks were slaughtered in order to weigh the bursa-fabricious (RF) and spleen. The results of anti-SRBC titer, anti- Newcastle and weight of BF and spleen did not differ significantly when compared to control group. However, feed intake, body weight and growth rate in 0.1 garlic powder in comparison with garlic tablet showed an increasing trend. The results of immunity tests indicated that the levels of garlic used in this study had insignificant effects on humeral immune parameters (p>0.05).