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PREVENTIVE AND CORRECTIVE ACTION OF FEED ADDITIVECAROTENE SYNTHESIZING YEAST Phaffiarhodozyma ON FORMation of INTESTINE MICROBIOCENOSIS OF CHIKEN DURING CRITICAL PERIOD OF ITS FORMATION

O. M. Stefanyshyn, H. I. Nechay, N. I. Boretska, S. V. Hural, N. І. Tsepko

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Institute of Animal Biology of NAAS, V. Stus str. 38; Lviv79034, Ukraine 

Just before hatching, gastrointestinal tract of chiken is sterile and in the early hours of their lives is colonized by microorganisms of environment. Young birds are more receptive to pathogenic microorganisms’ colonization due to unformed microbiocenosis of intestine. Therefore, one of the important tasks in getting healthy poultry livestock is to provide quick and formation of the digestive tract microflora of young growth.

The experiment was conducted on 3 groups of young laying hens Hayseks brown cross from 10-day to 60-days old, 3 heads per group in the vivarium of the Institute of Animal Biology of NAAS. Fowls of control group were consuming complete feed (CF), balanced in nutrients and bioactive components. Starting from 18th day, to the diet of chicken of the first experimental group the yeast Phaffia rhodozyma biomass (1% by weight of diet) was introduced for two weeks, and the second experimental group got the yeast Phaffia rhodozyma biomass (1% by weight of diet) starting from 46th day for two weeks. The 32- and 60-day old chickens were slaughtered. Samples of blind gut contents were collected, transferred into sterile laboratory glassware and specific quantitative and qualitative composition of microflora was investigated by diluting and seeding microorganisms on selective mediums. Their identification was carried out according to morphological, physiological and biochemical properties.

Article includes characteristics of the intestinal microflora of young growth of laying hens Hayseks brown cross in 10-day to 60-days age when being fed with the yeast Phaffia rhodozyma biomass.

In order to prevent and correct disorders at formation of microbiocenosis of chickens’ intestine, it is offered to use biomass of non-pathogenic carotene synthesizing yeast Phaffia rhodozyma at an early age (since 18th day), when formation of chickens’ microbiocenosis gastrointestinal tract is in progress as prebiotic preparation. During the second critical stage of formation of microbiocenosis tract (from 46th to 60 day of life), we propose to use biomass of non-pathogenic carotene synthesizing yeast Phaffia rhodozyma (in the amount of 1% by weight of the diet) as a probiotic for two weeks.

Keywords: INTESTINAL MICROFLORA, BIFIDOBACTERIA, LACTOBACILLI, Escherichia coli, blind gut, Phaffia rhodozyma,young growth of laying hens HAYSEKS BROWN cross


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