NED373392NED

138 Труды Федерального центра охраны здоровья животных. Том X EFFICACY OF IMMUNIZATION WITH LIVE VACCINE AGAINST INFECTIOUS LARYNGOTRACHEITIS OF POULTRY WITH HOMOLOGOUS HUMORAL IMMUNITY V.Yu. Kulakov 1 , K.Yu. Fedoseyev 2 , A.E. Menschikova 3 1 leading research worker, PhD (Veterinary Medicine), FGBI «ARRIAH», Vladimir; Е-mail: kulakov@arriah.ru 2 research worker, PhD Biology), FGBI «ARRIAH», Vladimir 3 senior research worker, PhD (Biology), FGBI «ARRIAH», Vladimir Summary The immune response to immunization with embryo vaccine against in- fectious laryngotracheitis based on "O" strain in poultry with homologous humoral immunity was studied. The threshold of the previous sera antibody titer was determined. The exceeding of the threshold restricts the propagation of the vaccine virus and decreases the efficacy of immunization with live vaccine. Key words : avian infectious laryngotracheitis, homologous humoral immunity, embryo vaccine Электронная Научная СельскоХозяйственная Библиотека