A new strain of Crimean-Congo hemorrhagic fever virus isolated from Xinjiang, China
Crimean-Congo hemorrhagic fever virus (CCHFV) is a highly pathogenic tick-borne virus with a fatality rate of up to 50% in humans. CCHFV is widely distributed in countries around the world. Outbreaks of CCHFV infection in humans have occurred in prior years in Xinjiang Province, China. Epidemiological surveys have detected CCHFV RNA in ticks and animals; however, few isolates were identified. In this study, we identified and isolated a new CCHFV strain from Hyalomma asiaticum asiaticum ticks collected from north of Tarim Basin in Xinjiang, China. A preliminary investigation of infection and antigens expression of CCHFV was performed in newborn mice. The target tissues for CCHFV replication in newborn mice were identified. The analysis of the phylogenetic relationships with other Chinese strains suggested that diverse genotypes of CCHFV have circulated in Xinjiang for years. These findings provide important insights into our understanding of CCHFV infection and evolution as well as disease prevention and control for local residents.
KeywordsCrimean-Congo hemorrhagic fever virus (CCHFV) newborn mice genotype phylogenetic analysis
This work was supported by the Science and Technology Basic Work Program (2013FY113500) from the Ministry of Science and Technology of China.
RG, JMS, JLL, ZYS, and QGW performed the ticks collection in Xinjiang and prepared the homogenates for newborn mice inoculation; RG and YFZ performed the mice inoculation and harvested the tissue samples, and performed the virus passage and IFA on cells; DL conducted the tissue sections from sacrificed mice and pathology analysis of CCHFV; ZYS and JY performed the CCHFV RNA detection in mice tissues. JMS and SS performed sequence of the genome with the phylogenetic analysis. YJZ and FD conceived of the study; RG and SS wrote the manuscript; YJZ and FD checked and finalized the manuscript.
Compliance with Ethics Guidelines
The authors declare that they have no conflict of interest. Animal experiments in this study were approved by the ethics committees of Wuhan Institute of Virology, Chinese Academy of Sciences (Approval number: WIVH01201 501).
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