Brazilian Reference Center on Yersinia spp. other than Y. pestis, Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto - USP, Ribeirão Preto, SP, Brazil.
Int J Syst Evol Microbiol. 2013 Aug;63(Pt 8):3124-3129. doi: 10.1099/ijs.0.047175-0.
Since Yersinia frederiksenii was first described in 1980, it has been recognized genotypically as a heterogeneous species, comprising three phenotypically indistinguishable genospecies. In this study, the sequence of the 16S rRNA gene and the concatenated sequences of six housekeeping genes (glnA, gyrB, hsp60, recA, rpoB and sodA) of all the currently known species of the genus Yersinia were used to determine the phylogenetic position of Y. frederiksenii genospecies 2 in the genus Yersinia. The phylogenetic analyses grouped the Y. frederiksenii genospecies 2 strains in a monophyletic group together with representative strains of Yersinia massiliensis. Moreover, the Y. frederiksenii genospecies 2 strains were also grouped apart from the other species of the genus Yersinia and far from the other two genospecies of Y. frederiksenii. All of the observations made in this study support the conclusion that Y. frederiksenii genospecies 2 should be reclassified as Y. massiliensis.
自 1980 年首次描述弗氏耶尔森菌以来，它在基因上被认为是一个具有遗传多态性的物种，由三个表型上无法区分的种群组成。在本研究中，使用了所有已知弗氏耶尔森菌种群的 16S rRNA 基因序列和 6 个管家基因（glnA、gyrB、hsp60、recA、rpoB 和 sodA）的串联序列，以确定弗氏耶尔森菌 2 种群在耶尔森菌属中的系统发育位置。系统发育分析将弗氏耶尔森菌 2 种群菌株与代表性的马西利亚耶尔森菌菌株一起分组在一个单系群中。此外，弗氏耶尔森菌 2 种群菌株也与耶尔森菌属的其他物种分开，并远离其他两种弗氏耶尔森菌种群。本研究中的所有观察结果都支持将弗氏耶尔森菌 2 种群重新分类为马西利亚耶尔森菌的结论。
