Citation: Jian Xiao, Xuan Yao, Xuhua Guan, Jinfeng Xiong, Yaohui Fang, Jingyuan Zhang, You Zhang, Abulimiti Moming, Zhengyuan Su, Jiayin Jin, Yingying Ge, Jun Wang, Zhaojun Fan, Shuang Tang, Shu Shen, Fei Deng, . Viromes of Haemaphysalis longicornis reveal different viral abundance and diversity in free and engorged ticks .VIROLOGICA SINICA, 2024, 39(2) : 194-204.  http://dx.doi.org/10.1016/j.virs.2024.02.003

Viromes of Haemaphysalis longicornis reveal different viral abundance and diversity in free and engorged ticks

  • Corresponding author: Shu Shen, shenshu@wh.iov.cn
    Fei Deng, df@wh.iov.cn
  • Received Date: 09 October 2023
    Accepted Date: 08 February 2024
    Available online: 13 February 2024
  • Haemaphysalis longicornis ticks, commonly found in East Asia, can transmit various pathogenic viruses, including the severe fever with thrombocytopenia syndrome virus (SFTSV) that has caused febrile diseases among humans in Hubei Province. However, understanding of the viromes of H. longicornis was limited, and the prevalence of viruses among H. longicornis ticks in Hubei was not well clarified. This study investigates the viromes of both engorged (fed) and free (unfed) H. longicornis ticks across three mountainous regions in Hubei Province from 2019 to 2020. RNA-sequencing analysis identified viral sequences that were related to 39 reference viruses belonging to unclassified viruses and seven RNA viral families, namely Chuviridae, Nairoviridae, Orthomyxoviridae, Parvoviridae, Phenuiviridae, Rhabdoviridae, and Totiviridae. Viral abundance and diversity in these ticks were analysed, and phylogenetic characteristics of the Henan tick virus (HNTV), Dabieshan tick virus (DBSTV), Okutama tick virus (OKTV), and Jingmen tick virus (JMTV) were elucidated based on their full genomic sequences. Prevalence analysis demonstrated that DBSTV was the most common virus found in individual H. longicornis ticks (12.59%), followed by HNTV (0.35%), whereas JMTV and OKTV were not detected. These results improve our understanding of H. longicornis tick viromes in central China and highlight the role of tick feeding status and geography in shaping the viral community. The findings of new viral strains and their potential impact on public health raise the need to strengthen surveillance efforts for comprehensively assessing their spillover potentials.

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    Viromes of Haemaphysalis longicornis reveal different viral abundance and diversity in free and engorged ticks

      Corresponding author: Shu Shen, shenshu@wh.iov.cn
      Corresponding author: Fei Deng, df@wh.iov.cn
    • a. Key Laboratory of Virology and Biosafety and National Virus Resource Center, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China;
    • b. Hubei Provincial Center for Disease Control and Prevention, Wuhan, 430070, China;
    • c. University of Chinese Academy of Sciences, Beijing, 101408, China;
    • d. Hubei Jiangxia Laboratory, Wuhan, 430200, China;
    • e. Xinjiang Key Laboratory of Vector-borne Infectious Diseases, Urumqi, 830002, China;
    • f. Current address: Department of Medical Laboratory, The Second Affiliated Hospital, Hainan Medical University, Haikou, 57000, China

    Abstract: Haemaphysalis longicornis ticks, commonly found in East Asia, can transmit various pathogenic viruses, including the severe fever with thrombocytopenia syndrome virus (SFTSV) that has caused febrile diseases among humans in Hubei Province. However, understanding of the viromes of H. longicornis was limited, and the prevalence of viruses among H. longicornis ticks in Hubei was not well clarified. This study investigates the viromes of both engorged (fed) and free (unfed) H. longicornis ticks across three mountainous regions in Hubei Province from 2019 to 2020. RNA-sequencing analysis identified viral sequences that were related to 39 reference viruses belonging to unclassified viruses and seven RNA viral families, namely Chuviridae, Nairoviridae, Orthomyxoviridae, Parvoviridae, Phenuiviridae, Rhabdoviridae, and Totiviridae. Viral abundance and diversity in these ticks were analysed, and phylogenetic characteristics of the Henan tick virus (HNTV), Dabieshan tick virus (DBSTV), Okutama tick virus (OKTV), and Jingmen tick virus (JMTV) were elucidated based on their full genomic sequences. Prevalence analysis demonstrated that DBSTV was the most common virus found in individual H. longicornis ticks (12.59%), followed by HNTV (0.35%), whereas JMTV and OKTV were not detected. These results improve our understanding of H. longicornis tick viromes in central China and highlight the role of tick feeding status and geography in shaping the viral community. The findings of new viral strains and their potential impact on public health raise the need to strengthen surveillance efforts for comprehensively assessing their spillover potentials.

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