NDLI: Metagenomic Analysis of Fever, Thrombocytopenia and Leukopenia Syndrome (FTLS) in Henan Province, China: Discovery of a New Bunyavirus

Content Provider	PubMed Central
Author	Xu, Bianli Liu, Licheng Huang, Xueyong Ma, Hong Zhang, Yuan Du, Yanhua Wang, Pengzhi Tang, Xiaoyan Wang, Haifeng Kang, Kai Zhang, Shiqiang Zhao, Guohua Wu, Weili Yang, Yinhui Chen, Haomin Mu, Feng Chen, Weijun
Editor	Palacios, Gustavo
Copyright Year	2011
Abstract	Since 2007, many cases of fever, thrombocytopenia and leukopenia syndrome (FTLS) have emerged in Henan Province, China. Patient reports of tick bites suggested that infection could contribute to FTLS. Many tick-transmitted microbial pathogens were tested for by PCR/RT-PCR and/or indirect immunofluorescence assay (IFA). However, only 8% (24/285) of samples collected from 2007 to 2010 tested positive for human granulocytic anaplasmosis (HGA), suggesting that other pathogens could be involved. Here, we used an unbiased metagenomic approach to screen and survey for microbes possibly associated with FTLS. BLASTx analysis of deduced protein sequences revealed that a novel bunyavirus (36% identity to Tehran virus, accession: HQ412604) was present only in sera from FTLS patients. A phylogenetic analysis further showed that, although closely related to Uukuniemi virus of the Phlebovirus genus, this virus was distinct. The candidate virus was examined for association with FTLS among samples collected from Henan province during 2007–2010. RT-PCR, viral cultures, and a seroepidemiologic survey were undertaken. RT-PCR results showed that 223 of 285 (78.24%) acute-phase serum samples contained viral RNA. Of 95 patients for whom paired acute and convalescent sera were available, 73 had serologic evidence of infection, with 52 seroconversions and 21 exhibiting a 4-fold increase in antibody titer to the virus. The new virus was isolated from patient acute-phase serum samples and named Henan Fever Virus (HNF virus). Whole-genome sequencing confirmed that the virus was a novel bunyavirus with genetic similarity to known bunyaviruses, and was most closely related to the Uukuniemi virus (34%, 24%, and 29% of maximum identity, respectively, for segment L, M, S at maximum query coverage). After the release of the GenBank sequences of SFTSV, we found that they were nearly identical (>99% identity). These results show that the novel bunyavirus (HNF virus) is strongly correlated with FTLS.
Related Links	http://dx.doi.org/10.1371/journal.ppat.1002369
Starting Page	1002369
File Format	PDF
ISSN	15537374
e-ISSN	15537374
Journal	PLoS Pathogens
Issue Number	11
Volume Number	7
Language	English
Publisher	Public Library of Science
Publisher Date	2011-11-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Immunology Genetics Molecular Biology Microbiology Parasitology Virology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Genetics Virology Molecular Biology Parasitology Immunology Microbiology

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