Detection and genetic characterization of peste des petits ruminants virus in free-living bharals (Pseudois nayaur) in Tibet, China

Abstract

Peste des petits ruminants (PPR) is an important viral disease of sheep and goats. The wildlife hosts of PPR, which may play an important role in the epidemiology of this disease, are not well characterized. The research was undertaken to study the infection of PPR virus (PPRV) in free-living bharals (Pseudois nayaur) in Tibet, China. In 2007, PPRV infection was confirmed in two bharals in Rutog County of Tibet based on clinical signs and detection of PPRV RNA in tissue samples. In 2008, PPRV infection was found in one bharal in Ge'gyai County of Tibet by competitive ELISA, reverse transcription-polymerase chain reaction, and sequence analysis of PPRV fusion protein (F) and nucleoprotein (N) gene segments. The PPRV variant identified in infected bharal was closely related to other circulating PPRV variants recently identified in sheep and goats from Tibet. This is the first report of PPRV infection in free-living bharals.