title: Definitions of antibodies to the newcastle disease virus in the yolk of birds of artificial nesting box in conditions of the North-East of Ukraine
abstract: Introduction. In the conditions of the North-East of Ukraine, the circulation of the newcastle disease virus in hollow-nesting birds of artificial nests box was studied. Serological studies of the yolks of eggs collected from hollow birds in the North-East of Ukraine to the Newcastle disease virus were carried out. PDefinitions of antibodies to the newcastle disease virus in eggs of artificial nesting birds and determining their role as a reservoir of the causative agent of the disease in the No
journal: CHERKASY UNIVERSITY BULLETIN BIOLOGICAL SCIENCES SERIES