The current study was designed to evaluate the efficacy in terms of growth performance, gut health and immune response using different concentration of aqueous extract blends of garlic, onion and chilli in comparison with standard Mannan Oligo-Sachharide and known antibiotics. A total of 360 day old broiler chicks Ross-308 were randomly allocated to six treatments groups replicated four times having 15 chicks per replicate. Following groups were designated as A, B and C receiving respective treatments at the rate of 1.5 ml per liter of drinking water having the Garlic:Onion:Chilli concentration as (T-1=37.5:50:12.5, T-2=50:25:25, T-3=50:37.5:12.5).While group D, E and F were designated for receiving standard (T-4) Mannan Oligo-Sacharide, and plain water (T-5) as negative and Zinc Bacitracin antibiotic (T-6) as positive control. Production performance parameters like body weight gain, FCR, feed intake, broiler performance efficiency factor and farm economy index were found significantly higher as compare to control groups in both starter (day 1-21), finisher phase (day 22-35) and over all period. Similarly, carcass traits like dressed weight, leg, thigh, breast, wing weight were found enhanced in groups receiving aqueous extract of garlic, onion and chilli and standard. Dressed weights for T-1 to T-6 were (1334.7, 1319.4, 1374, 1379.6, 1298.2, 1323.6 gm). The immune response for birds receiving aqueous extracts of garlic, onion and chilli for NDV, IB and IBD with increased weight of lymphoid organs. Higher phagocytic activity for PHA-P (1.06, 1.05, 1.02, 0.93, 0.69, and 0.88), C-reactive protein and leuckogram were recorded. These results of the current study revealed that aqueous extract of garlic, onion and chilli could be used as alternative to antibiotics with improved growth performance and immune response when used at 1.5 ml per liter.

Keywords: Garlic, Onion, Chilli, FCR, Growth performance, Immunity, PHA-P, Leuckogram