2008-2011年浙江省猪主要病毒性疫病病原流行病学调查

为了解浙江省猪主要病毒性疫病的流行动态,采集近4年来临床病猪病料1118头份,采用PCR和RT-PCR方法进行猪主要病毒性疫病的病原检测.结果显示,PRRSV,CSFV,JEV,PCV2,PRV,PPV,PEDV和TGEV病原的平均感染率分别为51.71％,15.71％,27.16％,50.8％,1.99％,84.4％和9.0％.其中PRRSV,CSFV和PCV2每年都有较高的检出率,仍是浙江省猪场的主要病原；PRV和PPV近年来流行有所下降,该病已得到较好控制；2011年初发现流产病例中JEV的检出比例有明显升高,检出率高达39.29％；2011年2月在刚出生仔猪腹泻病例中PEDV检出率大大提高,造成严重损失.总之,浙江省猪场中PRRSV,CSFV和PCV2仍是防控的重点,但多病原感染或新变异株的出现也是近年来浙江省猪疫病复杂化的主要原因之一.

Epidemiology analysis of major viral diseases of porcine in Zhejiang province during 2008-2011

To study the epidemiology characteristics of major viral disease of porcine in Zhejiang province,a total of 1 118 clinical samples in the latest four years were collected,and viral pathogens were detected by PCR or RT-PCR.It showed that the mean infection rates of PRRSV,CSFV,JEV,PCV2,PRV,PPV,PEDV and TGEV were 51.71%,15.71%,27.16%,50.80%,1.99%,84.40% and 9.00%,respectively.Among these pathogens,PRRSV,CSFV and PCV2 were most commonly detected during all the four years,which were still the most important porcine viral pathogens in Zhejiang province.The prevalence of PRV and PPV had been declining these years,indicating these diseases have been controlled effectively.Increase in detection rate(up to 39.29%) of JEV in aborted fetus was observed in the beginning of 2011.Remarkable increasing of detection rate of PEDV in newborn piglet occurred in February 2011,which caused heavy economic loss.In conclusion,PRRSV,CSFV and PCV2 are still the key pathogens for prevention and control in Zhejiang;moreover,multiple infection and emergence of new virus mutant are one of main factors that contributes to the increasing complexity of porcine disease.