中国农业科学 ›› 2005, Vol. 38 ›› Issue (03): 596-600 .

• 畜牧.兽医.资源昆虫 • 上一篇    下一篇

新型基因工程亚单位菌苗对猪传染性胸膜肺炎的保护效力研究

刘建杰,陈焕春,李冲,何启盖,吴斌   

  1. 华中农业大学动物医学院
  • 收稿日期:2004-02-02 修回日期:2004-12-16 出版日期:2005-03-10 发布日期:2005-03-10
  • 通讯作者: 陈焕春

Study on the Protective Efficiency of the Genetic Subunit Bacterin Against Porcine Contagious Pleuropneumonia

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  1. 华中农业大学动物医学院
  • Received:2004-02-02 Revised:2004-12-16 Online:2005-03-10 Published:2005-03-10

摘要: 利用分泌毒素ApxⅠ、ApxⅡ、ApxⅢ的重组表达产物和胸膜肺炎放线杆菌7型菌,研制了一种新型的基因工程亚单位菌苗并对此疫苗的免疫效力进行了研究。利用该疫苗免疫断奶仔猪,间隔3周加强1次,同时设空白对照组和一种商品化的三价细菌灭活苗组。首免后每周采血检测ApxⅠ、ApxⅡ、ApxⅢ的ELISA抗体和7型菌的血凝抗体,第2次免疫两周后用猪胸膜肺炎放线杆菌1型菌株进行气管攻毒。从攻毒后症状、细菌分离、抗体检测、死后剖检对免疫效果进行评价。结果显示亚单位菌苗对于猪传染性胸膜肺炎有显著的保护力,能明显减轻临床症状和降低肺部损伤,效果优于商品化的细菌灭活苗。

关键词: 亚单位菌苗, 细菌灭活苗, 抗体, 保护效力

Abstract: The efficacy of a new genetic subunit bacterin containing recombinant Apx toxins and serovar 7 of Actinobacillus pleuropneumoniae was determined. Weaned piglets were vaccinated twice intramuscularly with the new genetic subunit bacterin or commerical trivalent formalin-inactivated A. pleuropneumoniae. The antibody of each antigen was detected each week after first immunization. Piglets were challenged by percutaneous intratracheal injection with serovar 1. The protective efficacy of immunization was evaluated by clinical, bacteriological, serological and post-mortem examination. The results suggest that immunization with subunit bacterin could reduce clinical sign and lung lesion, which is more efficacious than bacterins.

Key words: Subunit bacterin, Commercial bacterin, Antibody, Protective efficacy