The aim of this study was to investigate if there is a phylogenetic divergence of Rickettsia amblyommatis strains from different phytogeographic provinces of Argentina and South America. Therefore, ompA and ompB gene sequences of R. amblyommatis DNA detected in Amblyomma hadanii and Amblyomma neumanni ticks from the Yungas and Chaco phytogeographic provinces, respectively, were obtained. These sequences were compared with GenBank sequences from R. amblyommatis from different countries of the American continent. The analyses shown that ompA haplotypes of R. amblyommatis form two clusters which differ phylogenetically. Regarding to ompB sequences, three groups of R. amblyommatis strains were detected. It could be shown that strains of R. amblyommatis detected in A. hadanii from the phytogeographic province Yungas are phylogenetic different to them detected in A. neumanni from the phytogeographic province Chaco. Furthermore, it could be observed that strains detected in different tick species associated with different phytogeographic provinces of the American continent differ phylogenetically.

中文翻译：

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来自阿根廷的立克次氏菌弱毒株之间的系统发生差异。

这项研究的目的是调查是否存在来自阿根廷和南美不同植物地理省份的立克次氏菌弱种的系统发育差异。因此，获得了分别从云加斯和查科植物地理省份的哈达姆氏菌和纽曼氏菌tick中检测到的弱视杆状菌DNA的ompA和ompB基因序列。将这些序列与来自美洲大陆不同国家的弱衣芽孢杆菌的GenBank序列进行了比较。分析表明，弱视杆状杆菌的ompA单倍型形成两个簇，在系统发育上不同。关于ompB序列，检测到三组弱视杆状菌株。可以证明在A.中检测到了弱视杆状杆菌菌株。来自植物地理省云加斯的哈达尼人与从植物地理省查科的纽曼尼氏菌中检测到的系统发育差异。此外，可以观察到，在与美洲大陆不同植物地理省相关的不同壁虱物种中检测到的菌株在系统发育上有所不同。