Borrelia burgdorferi sensu lato (Bbsl) spirochetes include the agents of Lyme borreliosis in temperate regions of the Northern Hemisphere, and merge their transmission cycles mainly with ticks of the Ixodes ricinus complex. Twenty genospecies compose Bbsl currently, and with the exception of Borrelia chilensis, and Borrelia garinii, all have been described only for North America, Europe, North Africa, and Asia. Here, we collected specimens of Ixodes paranaensis, a tick associated with swifts in a Brazilian natural park from the state of Minas Gerais, and performed a molecular characterization of 11 borrelial genes. Based on comparisons of inter and intraspecific genetic divergences, and Bayesian phylogenetic trees inferred for 16S rRNA, flaB, p66, and concatenated clpA, clpX, pepX, pyrG, recG, nifS rlpB, and uvrA genes, we demonstrate the occurrence of a new genospecies of Bbsl. "Candidatus Borrelia ibitipoquensis" Ip37 is closely related to Borrelia sp. Am501, and Borrelia valaisiana, a spirochete transmitted by ticks of the I. ricinus complex in Eurasia that uses birds as reservoirs. In a similar ecological scenario involving ticks and avian hosts, the migratory swift Streptoprocne biscutata is the sole-documented bird associated with I. paranaensis, and, although not assessed in this study, could correspond to the vertebrate reservoir of this newly described genospecies in Brazil. Pathogenic roles of "Ca. B. ibitipoquensis" are still unknown. However, its possible vector I. paranaensis is not an anthropophilic tick, so human infections would be unlikely to occur. Our finding enhances the knowledge on Bbsl in South America, highlights the occurrence of ecologically and genetically related genospecies with vastly separated geographical distributions, and calls for the attention to explore a barely known diversity of spirochetes of this group in the region.

中文翻译：

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“巴西假丝酵母”，是一种与巴西假丝酵母相关的基因，其特征是巴西的巴拉圭大虾。

伯氏疏螺旋体（Bbsl）螺旋体包括北半球温带地区的莱姆氏疏螺旋体的病原体，并且将其传播周期主要与the蓟马的tick体融合。目前，有20种基因型组成Bbs1，除了伯氏疏螺旋体（Borrelia chilensis）和鲍氏疏螺旋体（Borrelia garinii）以外，都仅在北美，欧洲，北非和亚洲有描述。在这里，我们收集了米纳斯吉拉斯州巴西自然公园中与s相关联的tick（Ixodes paranaensis）标本，并对11个无硼基因进行了分子表征。根据种间和种内遗传差异的比较，以及针对16S rRNA，flaB，p66和串联的clpA，clpX，pepX，pyrG，recG，nifS rlpB和uvrA基因推断出的贝叶斯系统树，我们证明了新的Bbs1基因型的出现。“ Candidatus Borrelia ibitipoquensis” Ip37与Borrelia sp密切相关。Am501和螺旋藻（Borrelia valaisiana）是通过欧亚大陆的蓖麻一氧化碳complex的transmitted传播的螺旋体，它利用鸟类作为水库。在涉及involving和禽类寄主的类似生态环境中，迁徙迅捷的链球菌biscutata是唯一与帕拉伊纳斯虫相关的鸟类，尽管在这项研究中未进行评估，但可能对应于巴西这种新近描述的基因物种的脊椎动物库。 。尚无“ Ca. B. ibitipoquensis”的致病作用。但是，其可能的病原体Para.ensis不是嗜人类的tick，因此不太可能发生人类感染。我们的发现增强了南美Bbsl的知识，