Studies on a Paramyxovirus Isolated from Japanese Sparrow-Hawks (Accipiter virgatus gularis) : I. Isolation and Characterization of the Virus

Abstract

A virus isolated from the brains of young Japanese sparrow-hawks suffering from an acute infection with a slight nervous symptom was shown to have the morphological, physical and chemical characteristics of a paramyxovirus. The virus was serologically related to Newcastle disease virus and Bangor virus but differed from them in some biological aspects mainly in hemagglutination (HA) activity. The HA reaction of the virus was temperature-dependent. The constant HA reaction was observed when tested at 4°C but not at room temperature or 37°C.