Characterization of a New Coronavirus-Like Agent Isolated from Parrots

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Abstract
A new virus from parrots was sensitive to lipolytic solvent treatment and labile to heat and low pH. It passed through a 220-nm but not a 100-nm filter. The particles, in ultrathin sections of cells, resembled coronaviruses in morphology and ranged from 90-120 nm. No cytopathic effect was noted in cell cultures. The virus did not agglutinate chicken or human O erythrocytes. The virus was tentatively classified as a coronavirus. No antigenic relationship to infectious bronchitis virus (IBV), transmissible gastroenteritis virus (TGEV) or canine coronavirus (CCV) was demonstrated. The virus was pathogenic for young chickens and budgerigars but not for Coturnix quail. The lesions were characterized by hemorrhagic necrosis in the liver and spleen. The severity of the lesions varied according to the route of inoculation and the age of the host.

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