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Author Affiliation :
Department of Clinical Sciences, Faculty of Veterinary Medicine, Razi University, Kermanshah, Iran.
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World Poultry Science Association (WPSA), 2nd Mediterranean Summit of WPSA, Antalya, Turkey, 4-7 October 2009
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World Poultry Science Association (WPSA), 2nd Mediterranean Summit of WPSA, Antalya, Turkey, 4-7 October 2009.
The objectives of this study were to investigate the effects of a commercial probiotic mixture (Bio-Plus 2B®) supplementation to the diet of broiler chickens on the growth performance and humoral immune response. Total of 180 one-day old Ross 208® broiler chicks, with the average weight of 38 grams, were subjected to a 42-day experimental period. The chicks were randomly divided into two experimental groups; group 1 as the control group and group 2 as the treatment group. Each group with the equal numbers of male and female included 3 replicates (30 chicks per replicate). Birds in group 1 received basal diets (starter, grower and finisher) without probiotic. Birds in group 2 were fed basal diets supplemented with the probiotic mixture at a rate of 1 Kg per ton in starter and 400 grams per ton in grower and finisher ration. The basal diets fed to the chicks in both groups were the same and were formulated to meet the NRC (1994) recommendations for broiler chickens. The birds in two groups were reared under the optimum environmental conditions. Feed and water were provided ad-libitum. Based on a local vaccination program, chicks in both groups were vaccinated against Newcastle disease on day 7 of age. During the experiment, birds were weighed weekly and feed intake per pen was recorded at the same time. Feed conversion ratio (FCR) was calculated on a pen weight basis. Blood samples were collected from wing vein on a day before and 14 and 28 days after vaccination. Hemagglutination inhibition (HI) test was performed on sera and humoral immunity was assessed as antibody production to Newcastle disease virus. Based on obtained results, the probiotic mixture supplementation to the broilers diet could improve the live body weight; feed conversion ratio and antibody response to Newcastle disease virus.
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World's Poultry Science Association (WPSA)
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Organism descriptor(s) :
birds, fowls, Newcastle disease virus
broilers, diets, feed additives, feed conversion efficiency, feed formulation, feed intake, haemagglutination inhibition test, humoral immunity, immune response, liveweight gain, poultry, probiotics
chickens, domesticated birds, hemagglutination inhibition test, immunity reactions, immunological reactions, liveweight gains
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Broader term(s) :
Gallus gallus, Gallus, Phasianidae, Galliformes, birds, vertebrates, Chordata, animals, eukaryotes, Avulavirus, Paramyxovirinae, Paramyxoviridae, Mononegavirales, negative-sense ssRNA Viruses, ssRNA Viruses, RNA Viruses, viruses, Developing Countries, Middle East, Threshold Countries, West Asia, Asia