SORPTION ACTIVITY OF MANNAN OLIGOSACCHARIDES AGAIST MICROORGANISMS OF THE GENUS SALMONELLA IN EXPERIMENTS IN VITRO AND IN VIVO

There are presented studies on using a feed additive containing mannan oligosaccharides to ensure the biological purity of poultry products. Mannan oligosaccharides (MOS) are natural chemical compounds derived from cell walls of the yeast Saccharomyces. In vitro studies of the sorption activity of the feed additive containing mannan oligosaccharides were conducted on museum strains and field isolates of microorganisms of the genus Salmonella. Data resulting from research indicate that the feed additive has pronounced sorption activity against microorganisms Salmonella spp. (63.98 percent). To study the effect of mannan oligosaccharides on the contamination of the muscles and internal organs by microorganisms Salmonella spp., 5 groups in 15 of day-old egg-type chicks were formed. The chicks of the experimental groups were fed a diet with MOS at concentrations of 0.1; 0.5; 1 and 2 percent of feed weight. The chicks of the control group were fed a diet with antibiotics instead of MOS. To determine a contamination level in the muscles and internal organs of chicks by microorganisms Salmonella spp., on the 30th day of the experiment was made a post-slaughter examination and sampling of muscles, liver, small and large intestinal contents. It has been established that the daily application of the feed additive, containing MOS at the concentration of 2 percent of the feed weight, reduces the bacterial contamination of chicks’ carcasses and internal organs by microorganisms of the genus Salmonella by 76.6 percent, as compared with the control. The use of MOS allow us to improve the biological safety of poultry products owing to decreased part of feed antibiotics in a diet and reduction in contamination level in the muscles and internal organs of chicks.

маннанолигосахариды, цыплята, микроорганизмы рода Salmonella, антибиотики, mannan oligosaccharides, chicks, microorganisms of the genus Salmonella, antibiotics

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