›› 2015, Vol. 42 ›› Issue (4): 852-858.doi: 10.16431/j.cnki.1671-7236.2015.04.012

• 生物技术 • 上一篇    下一篇

水貂奇异变形杆菌的分离鉴定及16S rRNA基因序列分析

王建科, 程悦宁, 易立, 赵航, 林鹏, 仝明薇, 程世鹏   

  1. 中国农业科学院特产研究所, 吉林省特种经济动物分子生物学重点实验室, 长春 130122
  • 收稿日期:2014-10-08 出版日期:2015-04-20 发布日期:2015-05-05
  • 通讯作者: 程世鹏 E-mail:tcscsp@126.com
  • 作者简介:王建科(1982-),男,河北邢台人,博士生,助理研究员,研究方向:特种动物疾病,E-mail:wangjianke_805@163.com;Tel:0431-81919845
  • 基金资助:
    吉林省特种经济动物生物制品科技创新中心;中国农业科学院科技创新工程基金

Isolation, Identification of Mink Proteus mirabilis and Sequence Analysis of 16S rRNA Gene

WANG Jian-ke, CHENG Yue-ning, YI Li, ZHAO Hang, LIN Peng, TONG Ming-wei, CHENG Shi-peng   

  1. Jilin Provincial Key Laboratory for Molecular Biology of Special Economic Animals, Institute of Special Animal and Plant Science, Chinese Academy of Agricultural Sciences, Changchun 130122, China
  • Received:2014-10-08 Online:2015-04-20 Published:2015-05-05

摘要: 从辽宁某貂场发病水貂中分离到1株致病菌,命名为PMSD株,通过形态学观察和生化试验等常规鉴定发现符合奇异变形杆菌特性,进一步经VITEK 2 Compact 30全自动细菌鉴定及药敏分析系统鉴定该株细菌为奇异变形杆菌.药敏试验结果显示PMSD株对氨基糖苷类药物、喹诺酮类药物等敏感,而对β-内酰胺类药物和磺胺类药物等不敏感.以细菌16S rRNA基因为模板应用通用引物进行PCR扩增,得到PMSD株的16S rRNA基因序列,长约1 504 bp,提交到GenBank中,登录号:KM229530.将该序列与GenBank中序列进行BLAST比对,结果发现与其匹配度最高的均是奇异变形杆菌各株系的16S rRNA序列,均高达99%以上.选取其中前20株作为参考序列,运用生物学软件构建系统发育树并进行同源性比对,结果表明,分离菌PMSD株与20个代表菌株的同源性为98.9%~99.7%,其中与BB2000株、HI4320株、B1株和FCC141株同源性最高,为99.7%.本研究为预防和控制奇异变形杆菌引起的水貂疾病奠定了一定的基础.

关键词: 水貂; 奇异变形杆菌; 分离鉴定; 16S rRNA

Abstract: One strain pathogenic bacteria named PMSD was isolated from the infected mink in Liaoning province, and identified as Proteus mirabilis by morphological observation and VITEK 2 Compact System from bioMerieux. Antibiotic susceptibility test of PMSD showed that it was highly sensitive to aminoglycosides and quinolones while resistant to beta-lactam and sulfonamides. The 16S rRNA gene of 1 504 bp was amplified by PCR from PMSD strain, which was deposited in GenBank (accession No. KM229530). BLAST analysis showed that the gene shared more than 99% homology with the sequences of Proteus mirabilis. Furthermore, the phylogenetic tree analysis of 16S rRNA gene indicated that PMSD 16S rRNA gene shared higher homology with other 20 Proteus mirabilis strains available in GenBank. The homologies of nucleotide was from 98.9% to 99.7%. The highest homology was 99.7% with BB2000 strain, HI4320 strain, B1 strain and FCC141 strain. This study provided a foundation for the prevention and control of mink diseases caused by Proteus mirabilis.

Key words: mink; Proteus mirabilis; isolation and identification; 16S rRNA

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