Аннотация
In the livestock farms of our country, infectious diseases are becoming more and more common in their etiology, the dominant role belongs to the opportunistic microflora. Streptococcus also belongs to this group of microorganisms [1]. Streptococcosis is an infectious disease of young farm animals, characterized by severe septic phenomena, inflammation of respiratory system, gastrointestinal tract, joints. All types of young animals are susceptible to streptococcosis, but calves, lambs and foals get sick more often, starting from the first days of life, up to 3-4 months. The disease begins with a respiratory rate, the appearance of breath sounds and wheezing, and cough with the development of pneumonia. The first signs of the disease appear in foals at the age of 1.5-4 weeks. Clinical manifestations differ depending on the location and extent of metastatic abscesses. Mortality from complications reaches 10%. Factors contributing and predisposing to the emergence and development of this disease are inadequate balanced nutrition, violation of the rules for the care and maintenance of calves. The basis for the prevention of streptococcosis should be a complex of veterinary and sanitary measures and good nutrition. On dysfunctional farms, it is impossible to keep sick and recovered cows with newborns, as well as drink their colostrum and milk. In this regard, it is very important for veterinary medicine to investigate infectious diseases of cattle, as well as to develop effective means for protecting animals, improving measures related to the prevention and elimination of this disease[7,8].This work presents data on the isolation of a field isolate of bovine streptococcosis, an indication and identification of a bacterial culture. Bacterial mass obtained and prepared antigen for development hyperimmune serum. The scheme of immunization and obtaining hyperimmune serum on laboratory and industrial animals has been worked out. Carried out laboratory and industrial tests of hyperimmune serum.