Detection of Quaranjavirus-Like Sequences from Haemaphysalis hystricis Ticks Collected in Japan

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  • Kobayashi Daisuke
    Department of Medical Entomology, National Institute of Infectious Diseases, Japan
  • Kuwata Ryusei
    Faculty of Veterinary Medicine, Okayama University of Science, Japan
  • Kimura Toshiya
    Meat Inspection Center of Ehime Prefecture, Japan
  • Faizah Astri Nur
    Department of Medical Entomology, National Institute of Infectious Diseases, Japan
  • Higa Yukiko
    Department of Medical Entomology, National Institute of Infectious Diseases, Japan
  • Hayashi Toshihiko
    Department of Medical Entomology, National Institute of Infectious Diseases, Japan
  • Sawabe Kyoko
    Department of Medical Entomology, National Institute of Infectious Diseases, Japan
  • Isawa Haruhiko
    Department of Medical Entomology, National Institute of Infectious Diseases, Japan

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  • Detection of Quaranjavirus-Like Sequences from <i>Haemaphysalis hystricis</i> Ticks Collected in Japan

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<p>Viruses belonging to the genus Quaranjavirus in the family Orthomyxoviridae are known as argasid tick-borne viruses. Some viruses in this genus or an unassigned quaranjavirus-like variant can infect humans, although little is known about their pathogenicity. During the surveillance of tick-borne viruses in ixodid ticks in Ehime Prefecture, Japan, novel quaranjavirus-like sequences were detected in 3 pooled samples of Haemaphysalis histricis nymphs. Phylogenetic analysis revealed that the detected viruses formed a cluster with quaranjaviruses and other related viruses. Specifically, the viruses were closely related to Zambezi tick virus 1 and Uumaja virus, which are quaranjavirus-like viruses recently discovered in ixodid ticks in Africa and Europe, respectively. These findings indicate that the viruses detected in this study were probably new members of the Quaranjavirus genus or a related group. The viruses were tentatively named “Ohshima virus” even though only limited sequences of their genomes were available. This is the first report on the detection of a quaranjavirus-like virus in the East Asian region. Further investigations are needed to discern its infectivity and pathogenicity against humans and other animals and to determine the potential risk of an emerging tick-borne viral disease.</p>

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