Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation.
Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation; Institute of Systematics and Ecology of Animals SB RAS, Novosibirsk, Russian Federation.
Ticks Tick Borne Dis. 2019 Oct;10(6):101254. doi: 10.1016/j.ttbdis.2019.05.020. Epub 2019 Jun 21.
Ixodes persulcatus and Ixodes pavlovskyi ticks, two closely related species of the I. ricinus - I. persulcatus group, are widely distributed in the southern part of Western Siberia. Recently, the existence of natural hybrids of I. persulcatus and I. pavlovskyi ticks has been demonstrated. The aim of this study was to evaluate the abundance of I. persulcatus/pavlovskyi hybrids in several locations with different ratios of parental tick species and to investigate the prevalence and genetic variability of a wide range of infectious agents in these hybrids compared to the parental tick species. Natural hybrids of I. persulcatus and I. pavlovskyi ticks were identified in all examined locations in Altai and Novosibirsk, Western Siberia, Russia. The abundance of hybrids varied from 7% to 40% in different locations and was maximal in a location with similar proportions of I. persulcatus and I. pavlovskyi ticks. For the first time, it was shown that hybrids can be infected with the same agents as their parental tick species: tick-borne encephalitis and Kemerovo viruses, Borrelia afzelii, Borrelia bavariensis, Borrelia garinii, Borrelia miyamotoi, Rickettsia helvetica, Rickettsia raoultii, Rickettsia sibirica, "Candidatus Rickettsia tarasevichiae", Anaplasma phagocytophilum, Ehrlichia muris, "Candidatus Neoehrlichia mikurensis", and Babesia microti. The prevalence of most bacterial agents in hybrids was intermediate compared to their parental tick species. Most genetic variants of the identified agents have been previously found in the parental tick species. Wide distribution of I. persulcatus/pavlovskyi natural hybrids implies that I. persulcatus, I. pavlovskyi and their hybrids coexist in all I. persulcatus - I. pavlovskyi sympatric areas.
谢氏血蜱和帕夫洛夫斯基血蜱是蓖子硬蜱-谢氏血蜱组中两个密切相关的物种，广泛分布于西西伯利亚南部。最近，已经证明谢氏血蜱和帕夫洛夫斯基血蜱存在自然杂交种。本研究旨在评估不同亲代蜱物种比例的几个地点中谢氏血蜱/帕夫洛夫斯基血蜱杂种的丰度，并与亲代蜱物种相比，调查这些杂种中广泛的传染性病原体的流行率和遗传变异性。在俄罗斯西西伯利亚阿尔泰边疆区和新西伯利亚的所有检查地点都发现了谢氏血蜱和帕夫洛夫斯基血蜱的自然杂交种。在不同的地点，杂种的丰度从 7%到 40%不等，在亲代蜱物种比例相似的地点丰度最高。首次表明，杂种可以感染与其亲代蜱物种相同的病原体：蜱传脑炎病毒和克麦罗沃病毒、巴尔通体 afzelii、巴尔通体 bavariensis、巴尔通体 garinii、巴尔通体 miyamotoi、立克次氏体 helvetica、立克次氏体 raoultii、立克次氏体 sibirica、"候选立克次氏体 tarasevichiae"、嗜吞噬细胞无形体、鼠埃立克体、"候选新立克次氏体 mikurensis"和微小巴贝斯虫。与亲代蜱物种相比，大多数细菌病原体在杂种中的流行率处于中间水平。已在亲代蜱物种中发现鉴定出的大多数病原体的遗传变异体。谢氏血蜱/帕夫洛夫斯基血蜱自然杂种的广泛分布表明，谢氏血蜱、帕夫洛夫斯基血蜱及其杂种共同存在于所有谢氏血蜱-帕夫洛夫斯基血蜱同域地区。
