Abstract
The changes the of intestinal microflora composition of Beijing broiler ducks at introduction of caroteneproduced yeast Phaffia rhodozyma biomass to the diet was studied. The positive changes of 37-days ducks intestinal microflora were revealed after two weeks of yeast P. rhodozyma biomasses application in 6- day-old birds’ diet (1 % of the weight of feed). It was a decrease of the E. coli total number and pathogenic staphylococci strains, the absence of Enterobacteriaceae (lac–) strains against the high number of bifidobacteria and lactobacilli. The E. coli total number reduced by 10 times at the expense of E. coli (lac±)-strains compared to 37-day birds three weeks after the experiment. The staphylococcus non-pathogenic strains number in 58-days ducks experimental group caecum contents reduced compared to 37-day birds three weeks after the experiment. Thus, the using of caroteneproduced yeast P. rhodozyma biomass in poultry diets helps to prevent violations of intestinal microflora and occurrence dysbiosis at critical periods of growth and development.
Highlights
In terms of efficiency of action, probiotics is not inferior to some antibiotics and chemotherapeutic agents
It is known that the environmental microflora influences the intestinal microbiocenosis, especially in the first days of life of young poultry
Antibiotics that inhibit the development of pathogens and normal intestinal microflora leading to dysbacteriosis are used
Summary
In terms of efficiency of action, probiotics is not inferior to some antibiotics and chemotherapeutic agents. Probiotics normalize the composition of intestinal microflora, and increase the productivity of animals. Analysis of the literature data shows that yeast cells have complex mechanisms of influence on intestinal microflora and the state of the microorganism. They prevent colonization of the gastrointestinal tract by pathogens, stimulate growth of endogenous lacto- and bifidobacteria, adsorb mycotoxins, change the redox potential of near-epithelial layer of the intestine, increase enzymatic activity of the digestive tract, synthesis of lactase, maltase and saccharase. Fragments of the yeast cell wall stimulate a weak immune system of young animals and poultry They modulate the activity of cells of the immune system, increasing body resistance to infections. The purpose of this study was to investigate the possibility of using biomass of carotene-synthesizing yeasts Phaffia rhodozyma for the correction of intestinal microflora composition in critical periods of growth and development of poultry, in particular ducks
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