[Newcastle disease virus in tissue cultures studied by an immunofluorescence method].

Studied was the opportunity to demonstrate the Newcastle Disease Virus in tissue cultures with the employment of an immunofluorescence method. The development was followed up of four strains--the vaccinal ones Hitchner B1, La Sota, and Komarov and the velogenic one, Texas GB, using chick fibroblasts. It was found that the velogenic strain cumulated earlier and more intensely than the vaccinal ones, where the virus was seen to explicitly locate perivascularly.