为了解山西省长子县猪瘟和猪O型口蹄疫免疫状况，评估疫苗免疫效果，2017—2019年在全县14个乡镇的规模场和散养户中，随机采集1 343场次的6 592份猪血清样品，采用间接ELISA方法进行免疫抗体检测。结果显示：2017—2019年长子县猪瘟和猪O型口蹄疫抗体合格率分别为84.85%、88.14%，均达到了农业农村部规定的70%以上的要求；色头镇抗体水平最低，分别为75.97%、76.39%，其他乡镇大多在80%以上；规模场的抗体合格率（86.32%、91.99%）高于散养户（84.12%、86.25%），差异均显著（P＜0.05）。结果表明，长子县猪瘟和猪O型口蹄疫整体免疫效果较好，但仍需持续加强免疫和抗体检测，有针对性地“分区域、按场点”开展猪瘟和猪口蹄疫防控工作。
In order to make clear the status of immunization against classical swine fever virus（CSFV）and foot-and-mouth disease virus（FMDV）type O in swine farms in Zhangzi County of Shanxi Province，and to evaluate the immune effect，a total of 6 592 serum samples were randomly sampled from 1 343 farms（times）in 14 towns from 2017 to 2019，covering scale swine farms and free-range households，to detect the immune antibodies by indirect ELISA. The results showed that the qualification rates of antibodies against CSFV and FMDV type O were 84.85% and 88.14%，respectively，both of which reached the national standard（＞70%）required by the Ministry of Agriculture and Rural Affairs；the qualification rates of antibodies were lowest in Setou Town，which were 75.97% and 76.39%，respectively，and the rates were all above 80% in most other towns；the antibody qualification rates of scale farms（86.32% and 91.99%）were higher than those of free-range households（84.12% and 86.25%），which were of significant difference（P＜0.05）. In short，the overall effect of immunization against CSFV and FMDV type O were good in Changzi County. However，it was still necessary to strengthen immunization and antibody detection，and to prevent and control the two diseases“by regions and premises”.