›› 2009, Vol. 36 ›› Issue (3): 127-130.

• 奶业专栏 • 上一篇    下一篇

奶牛隐性乳房炎奶样中埃希氏大肠杆菌共同性抗原初探

杨学云,李建军,王治才,玛利亚姆   

  1. (新疆畜牧科学院兽医研究所,乌鲁木齐 830000 )
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-03-20 发布日期:2009-03-20

Preliminary Studies on Common Antigen of Escherichia ColiIsolated from Subclinic Mastitis Samples

YANG Xue-yun, LI Jian-jun, WANG Zhi-cai, Maliyamu   

  1. (Xinjiang Academy of Animal Science, Urumuqi 830000, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-03-20 Published:2009-03-20

摘要: 用LMT的方法对新疆8个奶牛场采集的1020份奶样进行隐性乳房炎的检测,并对阳性样品进行了大肠杆菌的分离与鉴定。从不同牛场分离菌株中挑选8株用家兔制备免疫血清,用试管凝集对从乳房炎奶样分离出的其它21株大肠杆菌进行共同性抗原的筛选。结果显示,免疫血清效价达1∶2560~1∶5120,85.7%的待检菌株与其中3种血清凝集反应呈阳性。对制备血清的8株菌进行SDS-PAGE电泳分析,菌体蛋白图谱显示在20~84 ku处存在大量相同或相似的蛋白条带;用制备的免疫血清进行免疫印迹分析,与8株菌的菌体蛋白在70 ku处呈现明显的抗原抗体反应。说明这些菌株存在共同性抗原。

关键词: 奶牛乳房炎; 大肠杆菌; 共同性抗原

Abstract: Subclinical mastitis were detected from 1020 milk samples collected from 8 dairy farms of Xinjiang by the method of LMT and Escherichia coli were isolated and identified from positive samples. Immune serums were prepared with 8 Escherichia coli chosen from the strains isolated from different farm. Common antigens were screened from other 21 Escherichia coli isolated from subclinical mastitis with tube agglutination test. Result showed that immune serum titer was 1∶2560 to 1∶5120 and 85.7% strain tested give positive reaction with 3 immune serum. SDS-PAGE analysis of 8 strains which used for immune serum made demonstrated that some similar or common protein bands appeared in 20 to 84 ku. Western blotting of 8 strains with immune serum shows that reaction occurred in 70 ku. The result shows that Escherichia coli isolated from subclinical mastitis samples have common antigens.

Key words: dairy cow mastitis; E. coli; common antigens

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