ANTIGENIC RELATEDNESS AMONG NEWCASTLE DISEASE VIRUS ISOLATES FROM NIGERIAN FERAL BIRDS AND THE LA ŚOTA STRAIN

Abstract

The antigenic properties of thirteen isolates of Newcastle disease virus were assessed against La Sota strain. Using one of the previously recognized formulas significant antigenic differences were observed and marked inhibitory activities were noticed amongst the isolates and their hyper-immune sera as well as that of the La Sota strain. The implications of these differences for Newcastle disease epidemiology and control in Nigeria are discussed.