Özet:

To maintain a stable composition of the gastrointestinal tract microflora in farm animals it is necessary to use probiotic agents to ensure the full functioning of the digestive, hormonal, and immune systems of the body. Most modern probiotics include lactic acid bacteria and bifidobacteria, which are the most physiologically valuable components of a healthy organism’s an indigenous microflora. The aim of this study was to provide indication and identification from the milk of healthy cows and gastric tract of healthy pigs and calves of the genus bacteria Lactobacillus, Bifidobacterium, and Lactococcus. The objects of research were cultures of microorganisms isolated from cows milk (82), the gastrointestinal tract of cattle (317), and piglets of different age groups (114). Bacteriological studies were carried out on the basis of the veterinary sanitation and parasitology laboratory of the National Scientific Center "Institute of Experimental and Clinical Veterinary Medicine" (Kharkiv) in accordance with current regulatory documents. According to the research of the gastrointestinal tract of clinically healthy calves and piglets isolated and typified to 317 and 114 cultures of microorganisms, the species composition of the microflora (82 bacterial cultures) of the cisternous and parenchymatous milk of clinically healthy cows was determined. A total of 513 isolates of microorganisms were isolated, including: Enterobacter spp. –2 (0,39%), Staphylococcus spp. – 7 (1,37%), Bacillus spp. – 11 (2,14%), Enterococcus spp. – 33 (6.43%), Lactococcus spp. – 75(14,62%), Bifid?bacterium spp. – 170 (33,14%), and Lactobacillus spp. – 215 (41,91%). In the study of the biological properties of isolated microorganisms Lactobacillus spp. (215) established their species identity: L. brevis – 7 (3.26%), L. delbrueckii – 9 (4,19%), L. acidophilus – 21 (9,77%), L. fermentum – 23 (10,69%), L. casei – 57 (26,51%), and L. plantarum – 98 (45.58%). Cultures of Bifidobacterium spp. (170) belong to B. suis – 2 (1,18%), B. breve – 7 (4,12%), B. lactentis – 15 (8,82%), B. bifidum – 21 (12,35%), B. longum – 22 (12,94%), B. infantis – 25 (14,71%), and B. adolescentis – 78 (45,88%). From samples of biological material of farm animals, 75 cultures of the genus Lactococcus spp. were isolated (75) of which Lactococcus lactis is representative. Isolated bacteria Lactobacillus spp., Bifidobacterium spp. and Lactococcus spp. promising when creating innovative probiotic products for farm animals. Key words?? 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