川渝部分地区育肥猪伪狂犬病血清流行病学调查及危险性因素

Seroepidemiological Investigation and Risk Factor Analysis of Pseudorabies in Finishing Pigs in Some Regions of Sichuan and Chongqing

采用PRVIgG抗体ELISA和分析流行病学的“病例—对照研究”方法,对四川、重庆的14个区县进行了育肥猪伪狂犬病血清流行病学调查及危险性因素分析.本试验共检测了1110头份育肥猪血样,平均阳性率为 18.11%（201/1110）,其中在四川地区育肥猪的抗体阳性率为17.61%（125/710）;重庆地区育肥猪的阳性率为 19.00%（76/400）.这表明在四川、重庆的部分区县存在猪伪狂犬病.危险性因素分析显示：在调查四川、重庆两地的 14个地区中,山区的猪伪狂犬病感染的血清阳性率高于丘陵地区（OR=1.14,95%CI=0.77-1.68;四川：OR= 1.07,95%CI=0.48-2.37;重庆：OR=1.29,95%CI=0.57-2.94）,差异不显著（p〉0.05）.农户散养猪的伪狂犬病感染的血清阳性率高于规模养殖场（OR=1.15,95%CI=0.84-1.57;四川：OR=1.14,95%CI=0.75-1.74; 重庆：OR=1.09,95%CI=0.13-9.32）,差异亦不显著（p〉0.05）.研究表明,在四川、重庆两地,地理条件和养殖方式因素与猪伪狂犬病的流行存在较弱的关联强度.

The objective of this work was to determine the seroprevalence of pseudorabies from finishing pigs in Sichuan and Chongqing. A total of 1,110 serum samples were obtained from 14 counties/districts with different topographic conditions and different breed styles. All the serum samples were tested for pseudorabies antibodies by PRV-IgG-ELISA（enzyme-linked immunosorbent assay）kit. Antibodies to pseud-orabies virus were detected in 201 （18.81%） of the 1 110 finishing pig sera, accounting for 17. 61G（125/710）and 19.00 G （76/400）of the total in Sichuan and Chongqing, respectively, thus indicating the presence of pseudorabies in pigs in some regions of Sichuan and Chongqing. A case-control study was carried out to identify herd level risk factors for antibodies to Aujeszky＇s disease virus（ADV）in finishing pigs in these areas. There was no significant association between the geographical location （mountain and hill areas） and seroprevalence of porcine pseudorabies （OR= 1.14, 95% CI=0.77-1.68;OR= 1.07, 95% CI=0.48-2.37 in Sichuan, and OR= 1.29, 95% CI=0.57-2.94 in Chongqing） and between breed style and seroprevalence （OR= 1. 15, 95G CI=0.84-1.57 and OR=1. 14, 950//00 CI=0.75-1.74 in Sichuan;and OR=1. 09, 95% CI= 0.13-9.32 in Chongqing）. The risk factor analysis indicated that breed types and geographical location were non-significantly associated with seroprevalence in Sichuan and Chongqing （P〉0.05）.