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148 Болезни птиц UDC 619:616.476-022.6:636.52/.58:616-097.3 SEROLOGICAL MONITORING OF INFECTIOUS BURSAL DISEASE ON POULTRY FARM OF THE REPUBLIC OF CRIMEA I.B. Ionkina 1 , N.G. Vorotilova 2 , S.I. Danylchenko 3 , D.V. Gadzevich 4 1 Researcher, FGBI «ARRIAH» Branch in the Republic of Crimea, Simferopol; e-mail: ionkina@arriah.ru 2 Head of Laboratory, Candidate of Science (Veterinary Medicine), FGBI «ARRIAH» Branch in the Republic of Crimea, Simferopol; e-mail: vorotilova@arriah.ru 3 Deputy Director, Candidate of Science (Veterinary Medicine) FGBI «ARRIAH» Branch in the Republic of Crimea, Simferopol; e-mail: danylchenko@arriah.ru 4 Junior Researcher, FGBI «ARRIAH» Branch in the Republic of Crimea, Simferopol; e-mail: gadzevich@arriah.ru Summary The main results of the epidemic analysis performed at the State Uni- tary Enterprise of the Republic of Crimea «Scientific-Experimental Poul- try Breeding Farm named after Frunze» («UOPPZ named after Frunze») are presented in the paper. Analysis of the poultry heard vaccination schedule implemented on the farm is provided. Based on the serological analysis of the blood sera obtained from 5, 6, 8-day-old cheeks, the IBDV maternal immunity was determined and it was 90-100%. Post-vaccina- tion immunity was determined in older cheeks (40, 43 and 89-day-old) and its level was 95-100%, while IBDV post-vaccination immunity in 32-day-old cheeks was only 60%. Key words: ELISA, infectious bursal disease, sera, maternal immu- nity, maternal antibodies, post-vaccination immunity, specific prevention. Электронная Научная СельскоХозяйственная Библиотека