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 virus have the ability to 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 three 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 a new member of the Quaranjavirus genus or a related group. The viruses were tentatively named Ohshima virus even though only limited sequences of their genome 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 or other animals and to determine the potential risk of an emerging tick-borne viral disease.

属于正粘病毒科的夸兰贾病毒属的病毒被称为阿加西德蜱传病毒。该属中的一些病毒或未指定的类似夸兰贾病毒的病毒具有感染人类的​​能力，尽管对其致病性知之甚少。在日本爱媛县硬蜱中蜱传病毒的监测过程中，在三个组织血吸虫若虫的混合样本中检测到了新的类似夸兰贾病毒的序列。系统发育分析显示，检测到的病毒与quaranjaviruses形成了一个簇 和其他相关病毒。具体来说，这些病毒与赞比西蜱病毒 1 和 Uumaja 病毒密切相关，它们是最近分别在非洲和欧洲的硬蜱中发现的类似夸兰贾病毒的病毒。这些发现表明，本研究中检测到的病毒可能是夸兰贾病毒属或相关组的新成员。尽管只有有限的基因组序列可用，但这些病毒暂时被命名为大岛病毒。这是东亚地区首次发现类夸兰贾病毒的报告。需要进一步调查以辨别其对人类或其他动物的传染性和致病性，并确定新出现的蜱传病毒疾病的潜在风险。