title: Characterization of a velogenic Newcastle disease virus isolated from broilers in Saudi Arabia.
abstract: A highly virulent Newcastle disease virus (SA84) was isolated from a large broiler operation in Saudi Arabia. The mean death time of chicken embryos given the minimum lethal dose, the pathogenicity of the isolate for 8-week-old chickens, the plaque characteristics, and the intracerebral pathogenicity index indicated that the isolate is of the viscerotropic velogenic pathotype.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D002645:Chickens / Q000382:microbiology*; D009522:Newcastle disease virus / Q000302:isolation & purification* / Q000472:pathogenicity; D012529:Saudi Arabia; D010948:Viral Plaque Assay; D014774:Virulence