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International Journal of Poultry Science

Year: 2019 | Volume: 18 | Issue: 8 | Page No.: 393-403
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Authors

E.N. Ngunyangi

E.N. Ngunyangi

J.K. Tuitoek

M.K. Ambula

A.M. Wachira

Keywords

Research Article

Evaluation of the Antibiotic Properties of Probiotics and their Efficacy on Performance and Immune Response in Broiler Chicken

E.N. Ngunyangi E.N. Ngunyangi's LiveDNA, J.K. Tuitoek, M.K. Ambula and A.M. Wachira
Objective: The study aimed to evaluate the extent of use of probiotics in the poultry feed industry and their efficacy in broiler diets. Methodology: Two surveys involving 100 agro vets and 36 poultry farmers were carried out. Fifteen brands of probiotics 0were found in agro vets with Product 1, 2, 3 and Product 4 being common. A total of 74.4% of the farmers used probiotics and Product 1, 7, 2 and Product 4 were common. Three hundred and seven, day-old broiler chicks were randomly assigned to dietary treatments; Control diet, Diet 2 (Product 1), Diet 3 (Control+Product 4), Diet 4 (Control+Product 7) and Diet 5 (Product 2). Disk diffusion test was used to test the inhibitory effect of probiotics on bacteria cultures; Escherichia coli, Staphylococcus aureus, Bacillus cereus and Candida albicans. Results: Probiotics had no significant effect (p>0.05) on daily weight gain, feed intake and feed conversion ratio during starter phase. Performance was not significantly affected by probiotics during the finisher phase except for Product 2 which depressed growth. Blood samples were collected to test the effects of probiotics on antibody response to Infectious Bursal Disease virus and they had no significant effect (p = 0.6868). Product 4 and 7 had an inhibitory effect while Product 1 and 2 did not. Conclusion: Performance of broilers was not affected by the inclusion of probiotics in the diet.
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