Ulko L. Bacterial association with necrobacillosis cows (distribution, etiology and pathogenesis, prevention and treatments).

The thesis is devoted the study of infectious pathology of factor type with a respiratory syndrome in calves and piglets of the first months of life, inducting the virus-bacterials associations of microorganisms with a leading role in pathogenesis of pulmon process of major pathogen of P. multocida and the development of inactivation emultionvaccine, against the factor of endogenous pulmonal pasteurelosis. The peculiarities of infectious process of pulmonal pasteurelosis were considered, the biological properties of major bactopathogen are studied, the virulence of the field agent of infection is identified, the factoress once of infectious process is shown, significance of the pasteurelosis and reconvalescents. Considerable biological distinctions between serovars A, D and B P. multocida, their ecological place of residence and mechanisms of back-up, and also the sparing methods of isolation of little viable agent and his uncultivated forms from biomaterial are stated. On the basis of a isolation of the pathogenic field agent in stationary the hearth of pasteurelosis infection, vaccine of the emultion, from inactivated DEI of polyvalent pasteurelosis antigen was developed. At creation of the vaccine optimum standards of oil adjuvant (OA), methods of suspension cultivation and chemical inactivation of the agent. A vaccine was tested on laboratory animals, calves and piglets, value of ImD50 was determined. On the basis of complex research NTD was developed.