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The Dynamics of Probiotics on Growth Performance and Immune Response in Broilers

S. M. L. Kabir
Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. M. Rahman
Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. B. Rahman
Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. M. Rahman
Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

S.U. Ahmed
Department of Microbiology and Hygiene, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

Abstract: The research work was conducted on "Hubbard Isa Starbro" broilers to evaluate the dynamics of probiotics relating to live weight gain, carcass carcass yield, weight of cut up meat parts and immune response. Day old broiler chicks were divided into four groups as group A (Vaccinated probiotics fed group), B (Nonvaccinated probiotics fed group), C (Vaccinated conventional fed group) and D (Nonvaccinated conventional fed group). Groups C and D were taken as control birds fed with commercial ration and groups A and B as experimental birds were fed with commercial ration with the addition of 2gm probiotics (Protexin® Boost)/10 litres drinking water upto 6th week of age. The result evidenced the following information: (a) The live weight gains obtained were significantly (p< 0.01) higher in experimental birds as compared to control ones at all levels during the period of 2nd, 4th, 5th and 6th weeks of age, both in vaccinated and nonvaccinated birds. (b) A significantly (p< 0.01) higher carcass yield occurred in broiler chicks fed with the probiotics on the 2nd, 4th and 6th week of age both in vaccinated and nonvaccinated birds. The weight of leg was found significantly (p< 0.01) greater for experimental birds as compared to control ones on the 2nd, 4th and 6th week of age. A significantly (p< 0.01) higher breast weight in broiler chicks fed with the probiotics was observed on the 4th and 6th week of age. Analogously a significantly (p< 0.05) higher breast portion weight was found in experimental birds as compared to control ones during 2nd week of age. (c) The antibody production was found significantly (p< 0.01) higher in experimental birds as compared to control ones. Significant differences were also observed in the weight of spleen and bursa due to probiotics supplementation. The results of the study thus revealed that probiotics supplementation promoted significant influence on live weight gain, high carcass yield, prominent cut up meat parts and immune response.

Keywords: Probiotics, Broiler growth, Immune response

Location: Mymensingh, Bangladesh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Chicken

Objectives:

Objective of this study was to determine the effect of feeding probiotics on growth performance and immune response in broilers.

Methodology:

Day old “Hubbard Isa Starbro” broiler chicks obtained from the local sale centre of Kaz Farms Limited, Mymensingh, Bangladesh were subjected to this experimental study. A total of eighty day old broiler chicks were divided into two main groups, group I (Probiotics fed group) and group II (conventional fed group) at the onset of the experimental study. All birds belonging to group I and II were further divided into four subgroups as group A (Vaccinated probiotics fed group), B (Non vaccinated probiotics fed group), C (Vaccinated conventional fed group) and D (Non vaccinated conventional fed group) on 6 day of the age. The birds were reared under hygienic management practices throughout the entire period of study. Commercially available poultry feed (Quality Feeds Ltd., Dhaka) was used throughout the experimental study. The broiler chicks were fed with standard broiler starter, broiler grower and broiler finisher ration as formulated by Quality Feeds Ltd., Dhaka. As per instruction probiotics were added to drinking water at a level of 2g/10-litres water and was given to birds belonging to group A and B for 5 days in a week. The remaining two groups such as group C and group D were kept as control without adding probiotics in drinking water. The live body weight of four birds antibody production using a microtiter hemagglutination from each subgroup was taken on day old age and sequentially at 7 days interval up to the end period of the experiment. The collected data on live weight, carcass yield, cut up meat parts, antibody titre, spleen and bursa weights were analyzed using MSTAT computer package programme in a Completely Randomized Design (Steel and Torrie, 1980) and means were compared for significant differences using Duncan multiple range test (Kramer, 1956).

Source of Information: International Journal of Poultry Science 3 (5): 361-364, 2004.

Article Link (Online Journal): http://src-online.ca/index.php/src/article/view/24

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present results demonstrated that the differences in the weight of spleen and bursa of probiotics and conventional fed broilers could be attributed to different level of antibody production in response to SRBC. It is interesting to note that the weights of spleen and bursa were found higher in nonvaccinated broilers as compared to vaccinated broilers. From the present results it was concluded that supplementation of probiotics had significant effect on growth performance and immune response in broilers.

Knowledge Management: Journal