豫北地区猪圆环病毒2型感染的血清学调查

Serological Investigation of Porcine Circovirus Type II(PCV2) Infection in Pig Farms in North Henan

[目的]明确河南省豫北地区PCV2感染的流行情况,以便控制PCV2感染的流行。[方法]从河南省豫北地区安阳、鹤壁、新乡、濮阳4市的猪场采集不同日龄猪群血清样品338份,用间接ELISA方法进行猪圆环病毒2型(PCV2)感染的血清抗体检测。[结果]结果表明:PCV2血清抗体阳性率:哺乳仔猪为16.0%(8/50);断奶仔猪为49.5%(53/117);生长肥育猪为51.4%(36/70);种公猪为18.1%(4/22);后备母猪为20.6%(7/34);经产母猪为54.5%(29/55);阳性率为70.4%(19/27),338份血清总阳性率为40.6%(137/338)。[结论]河南省豫北地区养猪业已受到猪圆环病毒2型的感染,应引起高度重视。

The objective of the study is to determine the situation of PCV2 infection epidemics so as to control the prevalence of PCV2. A total number of 338 serum specimens were sampled from the various pig herds in Anyang, Hebi, Xinxiang and Puyang 7 prefectures of north Henan Province for detection the antibody against Porcine Circovirus type2（PCV2）by means of indirect ELISA. The results showed that the PCV2 antibody positive rate of suckled piglets, post-weaned piglets, hogs,service boar, replacement gilts, sows were 16.0% （8/50）, 49.5% （53/117）, 51,4% （36/70）, 18.1% （4/22）, 20.6% （7/34） and 54.5% （29/55）, respectively; 27 serum specimens of 2 to 3 month old pigs which show PMWS-like clinical symptoms were examined, the positive detectable rate was 70.4% （19/27） and the total positive detectable rate reach 40.6% （137/338）. The pig industry in north Henan Province has influence by PCV2; great attention should be paid to this situation.