[Objective]Postweaning multisystemic wasting syndrome(PMWS) is mainly caused by porcine circovirus type 2(PCV - 2).This disease happens in many countries,including China,and has caused heavy loss in swine industry.Pathogen diagnosis provides the basis for further control of the disease.[Method] Pathogen were detected by clinical dissection,bacterial isolates,PCR,RT - PCR from a scale pig farm suspected PWMS in Xinjiang.And gene amplified from PCR product was cloned and sequenced.[Result] Test results show t...