Biological characters of the field strains of Newcastle disease virus (N D V).
D000818:Animals; D002642:Chick Embryo; D002645:Chickens; D046508:Culture Techniques; D006386:Hemagglutination Tests; D006387:Hemagglutination, Viral; D006358:Hot Temperature; D009500:Neutralization Tests; D009522:Newcastle disease virus / Q000302:isolation & purification / Q000472:pathogenicity; D014774:Virulence; D014776:Virus Cultivation