›› 2009, Vol. 36 ›› Issue (1): 49-52.

• 生物技术 • 上一篇    下一篇

致病性猪链球菌2型的病原分离鉴定及毒力因子的PCR检测

胡杰1,2,刘棋2   

  1. 1.南京农业大学, 南京 210095; 2.广西区动物疫病预防控制中心, 南宁 530001
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-01-20 发布日期:2009-01-20

Isolation and Identification on Pathogens of Swine Streptococcosis and PCR Assays

HU Jie1,2, LIU Qi2   

  1. 1.Nanjing Agriculture University, Nanjing 210095, China;2.Guangxi Animal Center for Disease Control and Prevention, Nanning 530001, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-01-20 Published:2009-01-20

摘要: 通过对广西某猪场急性死亡的猪进行病原分离,分离到革兰氏阳性球菌,用链球菌快速鉴定试剂条Rapid ID 32 Strep鉴定为猪链球菌2型;并对分离菌进行猪链球菌2型荚膜多糖抗原(cps2J)及其重要毒力因子溶菌酶释放蛋白(MRP)、细胞外蛋白因子(EF)和溶血素(SLY)的多重PCR检测,同时对cps2J基因进行序列测定,与GenBank发表的猪链球菌2型相比,同源性为98.8%,毒力因子MRP、EF和SLY检测均为阳性,证实广西某猪场急性死亡的猪为高毒力猪链球菌2型感染所致。动物试验中,该菌可引起小白鼠部分死亡,家兔体温最高升至40.3℃,最后败血而死。

关键词: 猪链球菌2型; 病原分离; 毒力因子; PCR

Abstract: Grampostive bacterium, identificated with Streptococcus suis serotype 2 by Rapid ID 32 Strep reagent of Streptococcus suis, was isolated in Guangxi. PCR assays were performed for detection of cps2J and three virulence factors, muramidaserelseased protein(MRP), extracelluar factor (EF) and suilysin gene(SLY) of Streptococcus suis. The sequence analysis revealed 98.8% homology to that of cps2J in GenBank. Virulence factors of Streptococcus suis serotype 2 were sly+mrp+ef+, which indicated that the cause of acute death of pigs was highvirulence Streptococcus suis serotype 2 in the pig farm. It was showed that determined bacteria caused infected rats death and leaded to infected rabbits showing temperature hoist to 40.3 ℃ and death due to blood poisoning. 

Key words: Streptococcus suis serotype 2; isolation and identification; virulence factors; PCR

中图分类号: