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  • Title: Serological and pathological studies of Newcastle disease viruses isolated from caged birds from Southeast Asia.
    Author: Kawamura M, Nerome K, Kodama H, Izawa H, Mikami T.
    Journal: Avian Dis; 1987; 31(3):564-9. PubMed ID: 2960314.
    Abstract:
    Eleven isolates of Newcastle disease virus (NDV), from caged birds imported from or captured in Southeast Asia in 1979-80, were antigenically divided into five distinct groups. Most of them were distinguishable from more classical NDVs (vaccine B1 strain and Miyadera strain) on the basis of their reactivity to eight monoclonal antibodies against the HN molecule of NDV in hemagglutination-inhibition tests. However, when three representative isolates were evaluated for their biological properties and pathogenicity against 1-day-old chickens, all three were found to be velogenic types that could induce serious symptoms of Newcastle disease and which eventually killed all of the chickens, regardless of the route of infection. There was not any significant correlation between their reactivity patterns with the monoclonal antibodies and their virulence.
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