河南农业科学 ›› 2023, Vol. 52 ›› Issue (2): 145-150.DOI: 10.15933/j.cnki.1004-3268.2023.02.016

• 畜牧·兽医 • 上一篇    下一篇

奶牛乳房炎源肺炎克雷伯菌PCR 和LAMP检测方法的建立

罗阳1,田唯嘉1,2,何芳1,浣成1,刘伯承1,张佰忠1,宋武1,杨青2,易康乐1   

  1. (1.湖南省畜牧兽医研究所,湖南 长沙 410131;2.湖南农业大学 动物医学院,湖南 长沙 410125)
  • 收稿日期:2022-06-27 出版日期:2023-02-15 发布日期:2023-04-03
  • 通讯作者: 杨青(1976-),女,湖南汉寿人,教授,博士,主要从事动物生殖调控研究。E-mail:qingyanghn@hunau.edu.cn 易康乐(1980-),男,湖南永州人,研究员,博士,主要从事动物繁殖技术调控研究。E-mail:yikangle@yeah.net
  • 作者简介:罗阳(1988-),男,湖南张家界人,助理研究员,主要从事动物营养与饲料科学研究。E-mail:xinhelu509@163.com
  • 基金资助:
    湖南省重点研发计划项目(2022NK2025,2020NK2066);长沙市科技计划项目(kh2201218);湖南创新型省份建设专项(2022NK4153)

Establishment of PCR and LAMP Methods for Detection of Klebsiella pneumoniae from Dairy Mastitis

LUO Yang1,TIAN Weijia1,2,HE Fang1,HUAN Cheng1,LIU Bocheng1,ZHANG Baizhong1,SONG Wu1,YANG Qing2,YI Kangle1   

  1. (1.Hunan Institute of Animal and Veterinary Science,Changsha 410131,China;2.College of Veterinary Medicine,Hunan Agriculture University,Changsha 410125,China)
  • Received:2022-06-27 Published:2023-02-15 Online:2023-04-03

摘要: 为快速鉴定因肺炎克雷伯菌侵染引起的奶牛乳房炎,进一步为该疾病提供更合理的治疗方案,分别以肺炎克雷伯菌16S-23S rDNA内部转录间隔层序列(Internal transcribed spacer,ITS)和脲酶UreD 基因为靶点,利用PCR技术和环介导等温扩增技术(Loop‑mediated isothermal amplification,LAMP)构建奶牛乳房炎源肺炎克雷伯菌快速鉴定方法。结果表明,利用PCR技术扩增ITS序列能准确鉴定出肺炎克雷伯菌,在核酸质量浓度为5×10-2ng/μL的环境中依然能实现稳定扩增;利用LAMP技术扩增UreD基因的最佳反应温度为62℃,其最低检测核酸质量浓度为5×10-7ng/μL,检测灵敏度是PCR方法的105倍。综上,建立了PCR技术和LAMP技术快速鉴定奶牛乳房炎型肺炎克雷伯菌的方法,特异性强且灵敏度高。

关键词: 奶牛乳房炎, 肺炎克雷伯菌, UreD基因, PCR, LAMP

Abstract: The purpose of this study is to quickly identify dairy mastitis caused by Klebsiella pneumoniae,so as to provide most reasonable treatment plan for this disease.Rapid identification methods of Klebsiella pneumoniae were established using PCR and loop‑mediated isothermal amplification(LAMP)based on the internal transcribed spacer(ITS)sequence of 16S‑23S rDNA and urease UreD gene,respectively.The results showed that Klebsiella pneumoniae could be accurately identified by ITS gene sequence,and amplified stably when the nucleic acid concentration was 5×10-2ng/μL.The optimal temperature and the lowest nucleic acid concentration by LAMP were 62℃ and 5×10-7ng/μL,respectively,moreover,LAMP detection sensitivity was 105 times that of PCR reaction. High‑specificity and ‑sensitivity rapid identification methods are established in this study using PCR and LAMP techniques,for dairy mastitis caused by Klebsiella pneumoniae.

Key words: Dairy mastitis, Klebsiella pneumoniae, UreD gene, PCR, Loop?mediated isothermal amplification(LAMP)

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