1059 serum samples from 40 swine farms of vaccination with PRRSV vaccine and 683 serum samples from 24 swine farms of non-vaccination with PRRSV vaccine were collected to determine antibody level of PRRSV with IDEXX PRRSV antibody ELISA Kit. Positive rate, coefficient variation (CV) and Sample/Positive (S/P) were analyzed. The result showed that in vaccinated pig farms, 883 of 1059 serum samples were positive of PRRSV antibody, average positive rate and CV were 83. 4% and 67. 1, respectively; S/P of 44 serum samples was higher than 2. 5, accounting for 4. 2%. In non-vaccinated pig farms, 290 of 683 serum samples were positive of antibody of PRRSV, average positive rate and CV were 42. 5% and 87. 4, respectively; S/P of 74 serum samples was higher than 2. 5, accounting for 10. 1 %. The results indicated that non-vaccinated pig farms have been infected by PRRSV. Average positive rate of PRRSV antibody is higher in vaccinated pig farms than in non-vaccinated pig farms. Simultaneously, CV and S/P in vaccinated pig farms decreased obviously compared to non-vaccinated pig farms. It is concluded that vaccination with PRRSV vaccine is one of better ways to control PRRS.%为探讨PRRS免疫猪场和非免疫猪场抗体水平差异,采集福建各地区64个不同规模猪场血清样本1 742份,其中免疫猪场40个共1 059份血清,非免疫猪场24个共683份血清；采用美国IDEXX公司PRRS病毒抗体ELISA试剂盒进行检测,分析其抗体阳性率、CV值及S/P区间分布值.结果显示:免疫猪场抗体阳性883份,阳性率算术平均值为83.4％,CV值为67.1,S/P值大于2.5的样本44份,占4.2％；非免疫猪场抗体阳性290份,阳性率算术平均值为42.5％,CV值为87.4,S/P值大于2.5的样本74份,占10.1％.表明免疫猪场抗体阳性率高,离散度小;非免疫猪场均可检测到PRRS阳性抗体,离散度大.揭示应加强PRRS的免疫,对疫情防控具有积极作用.
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