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从中国人体伤口分泌物中分离得到的新种。

sp. nov. recovered from human wound secretion in China.

机构信息

Center for Pathogen Research, West China Hospital, Sichuan University, Chengdu, PR China.

Division of Infectious Diseases, State Key Laboratory of Biotherapy, Chengdu, PR China.

出版信息

Int J Syst Evol Microbiol. 2019 Oct;69(10):3155-3160. doi: 10.1099/ijsem.0.003606.

Abstract

A novel strain WCHEs120001 was recovered from the wound secretion of a patient at West China Hospital, Chengdu, PR China, in 2017. The strain was Gram-stain-negative, facultatively anaerobic, motile, and non-spore-forming. A preliminary analysis based on the 16S rRNA gene sequence revealed that this strain was closely related to members of the genus . The strain was subjected to whole genome sequencing. Phylogenetic analysis based on core gene sequences of type strains of all species revealed that this strain belonged to the genus but were distinct from any previously known species. Both average nucleotide identity (ANI) and DNA-DNA hybridisation (isDDH) values between strain WCHEs120001 and type strains of all known species were 82.02 to 92.37% and 25.6 to 50.9 %, respectively, which are lower than the 95 % (ANI) and 70 % (isDDH) cutoff for species delineation. The major fatty acids of the strain WCHEs120001 are C, sum of Cω7/Cω6 and Cω7, which are similar to other species. Genomic DNA G+C content of strain WCHEs120001 was 53.33 mol%. Strain WCHEs120001 is positive for methyl-d-glucopyranoside but does not ferment adonitol, d-arabitol, dulcitol and melibiose, which distinguishes it from all other species. Genotypic and phenotypic characteristics indicate that strain WCHEs120001 represents a novel species of the genus for which the name sp. nov. is proposed. The type strain of sp. nov. is WCHEs120001 (=GDMCC1.1570=NCTC 14272).

摘要

一株新型菌株 WCHEs120001 于 2017 年从中国成都华西医院一位患者的伤口分泌物中分离得到。该菌株革兰氏阴性,兼性厌氧,运动,不产芽孢。基于 16S rRNA 基因序列的初步分析表明,该菌株与属内的其他成员密切相关。该菌株进行了全基因组测序。基于所有种属型菌株的核心基因序列的系统发育分析表明,该菌株属于属,但与任何已知的种属都不同。菌株 WCHEs120001 与所有已知种属型菌株的平均核苷酸同一性(ANI)和 DNA-DNA 杂交(isDDH)值分别为 82.02%至 92.37%和 25.6%至 50.9%,均低于种属划分的 95%(ANI)和 70%(isDDH)的界限。菌株 WCHEs120001 的主要脂肪酸为 C、Cω7/Cω6 和 Cω7 的总和,与其他种属相似。菌株 WCHEs120001 的基因组 DNA G+C 含量为 53.33mol%。菌株 WCHEs120001 对甲基-d-葡萄糖苷呈阳性,但不发酵阿东醇、d-阿拉伯醇、山梨醇和蜜二糖,这与其他所有种属相区别。基因型和表型特征表明,菌株 WCHEs120001 代表了属的一个新型种属,提议命名为 sp. nov.。该新型种属的模式菌株为 WCHEs120001(=GDMCC1.1570=NCTC 14272)。

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