LABORATORy ANALySIS OF AvIAN FLU AND PREvENTIvE vACCINATION AGAINST IT
The purpose of the the research was to study effective diagnostic methods, prophylaxis and control of avian flu, identification of the factors influencing development of resistant immunity to highly pathogenic avian influenza (HPAI). The research has been carried out at the department of an epizootilogy, microbiology, parasitology and veterinary sanitary inspection of the Bryansk State Agricultural Academy. The immunostimulating effect of tincture of purple Echinacea and enzyme “NIST” on development of antibodies and the level of postvaccinal immunity against the avian flu was tested on experimental groups of chickens. To study the immune status of birds we used an immunostimulator, purple echinacea (a dose of 0.5 ml for 40 % of tincture for 1 kg of mass of a bird) and the complex drug “NIST” (1 g of drug on 1 kg of forage). Inactivated virus vaccine against flu of A type of the H5 subtype made of the inactivated influenza virus of the H5N1 subtype and an oil adjuvant was used for immunization. Optimal variants were by practical consideration developed for sampling, works with various pathological material, identification of the received results, as control are used samples with the high- pathogenic strain (H5 and H7). As a result, we proved the expediency of use of enzymes and immunostimulating drugs before carrying out vaccination of poultry.