Mimiviruses have been detected in various habitats. Analyses of single nucleotide substitutions (SNSs) have revealed that SNSs are mainly localized on both ends of the mimivirus genome, and mimivirus lineage A has been split into three genotype groups; therefore, mimiviruses may be classified into lineages and genotype groups based on SNSs. We isolated 9 mimiviruses from Japan and analyzed SNSs. These isolates were classified as lineage A genotype group type 2, suggesting that the local diversity of members of the family Mimiviridae isolated from Acanthamoeba spp. is lower than that of giant viruses from other families isolated in Japan.

中文翻译：

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日本拟菌病毒基因组中SNSs的分布及拟菌病毒的分类

拟菌病毒已在各种栖息地中被检测到。单核苷酸取代（SNSs）分析表明，SNSs主要定位于拟菌病毒基因组的两端，拟病毒谱系A已分为三个基因型组；因此，拟病毒可以根据 SNS 分为谱系和基因型组。我们从日本分离了 9 种拟态病毒并分析了 SNS。这些分离株被归类为谱系 A 基因型组 2 型，表明从棘阿米巴属分离的拟杆菌科成员的局部多样性。低于日本分离出的其他科的巨型病毒。