河南省新乡地区猪流行性腹泻流行病学调查

Epidemiological investigation on porcine epidemic diarrhea in Xinxiang of Henan

猪流行性腹泻病毒(porcine epidemic diarrhea virus,PEDV)对我国养猪业造成了持续性影响.为了弄清河南省新乡地区猪流行性腹泻的发病规律,对2018年1—12月期间采自新乡地区延津县、封丘县、原阳县、获嘉县、长垣县5个县55个猪场的351份病料进行了RT-PCR检测.结果表明:PEDV的猪场阳性率和样品阳性率分别为41.3%(19/55)和35.2%(125/351);其中以延津县的样品阳性率最高,为58.33%,封丘县最低,为23.6%;不同季节均有PED发病,冬季较高,阳性率为55.2%,春、秋季较低,阳性率分别为15.0%和32.9%;PEDV与传染性胃肠炎病毒(TGEV)、轮状病毒(RV)和圆环病毒2型(PCV2)存在不同程度的混合感染.研究结果为新乡地区PEDV的防控提供了参考.

Porcine epidemic diarrhea virus(PEDV)has a persistent impact on pig farms in China.In order to find out epidemiological characteristics of PEDV in northern Henan,RT-PCR was carried out to detect 351 samples collected from 55 farms from Yanjin,Fengqiu,Yuanyang,Huojia and Changyuan in 1―12 months of 2018.The results showed that the positive rates of pig farms and samples were 41.3%(19/55)and 35.2%(125/351),respectively.The sample positive rate was the highest in Yanjin(58.33%)and the lowest in Fengqiu(23.6%).PED showed higher incidence in Winter(55.2%)and lower in Spring and Autumn(15.0%)and 32.9%,respectively.PEDV displayed mixed infections with transmissible gastroenteritis virus(TGEV),rotavirus(RV)and circovirus type 2(PCV2)in varying proportions.These findings provide a reference for the prevention and control of PEDV in Xinxiang of Henan.