Detection of new bunyavirus RNA by reverse transcription-loop-mediated isothermal amplification

Xue Yong Huang, Xiao Ning Hu, Hong Ma, Yan Hua Du, Hong Xia Ma, Kai Kang, Ai Guo You, Hai Feng Wang, Li Zhang, Hao Min Chen, J. Stephen Dumler, Bian Li Xu

Research output: Contribution to journalArticlepeer-review

Abstract

Severe fever with thrombocytopenia syndrome (SFTS) is a newly emerging and epidemic infectious disease in central and northeast China. It is caused by New Bunyavirus and carries an average 12% case fatality rate. Early and rapid detection is critical for prevention and control of New Bunyavirus infection, since no vaccine or antiviral drugs are currently available, and prevention requires careful attention to control of the suspected tick vector. In this study, a simple and sensitive reverse transcription-loopmediated isothermal amplification (RT-LAMP) assay was developed for rapid detection of New Bunyavirus. The detection limit of the RT-LAMP assay was approximately 10 3 50% tissue culture infective doses/ml of New Bunyavirus in culture supernatants, and no cross-reactive amplification of other viruses known to cause similar clinical manifestations was observed. The assay was further evaluated using 138 specimens from clinically suspected SFTS and 40 laboratory-proven hantavirus infection with fever and renal syndrome patients, and the assay exhibited 97% agreement compared to real-time RT-PCR and conventional RT-PCR. Using real-time RT-PCR as the diagnostic gold standard, RT-LAMP was 99% sensitive and 100% specific. The RT-LAMP assay could become a useful alternative in clinical diagnosis of SFTS caused by New Bunyavirus, especially in resource-limited hospitals or rural clinics of China.

Original languageEnglish (US)
Pages (from-to)531-535
Number of pages5
JournalJournal of clinical microbiology
Volume52
Issue number2
DOIs
StatePublished - Feb 2014
Externally publishedYes

ASJC Scopus subject areas

  • Microbiology (medical)

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