河流水中大肠杆菌分离株的 1 类整合子存在、毒力基因与系统发育群的关系。
Association between the presence of class 1 integrons, virulence genes, and phylogenetic groups of Escherichia coli isolates from river water.
机构信息
Department of Microbiology, Faculty of Biology, Adam Mickiewicz University in Poznań, ul. Umultowska 89, 61-614, Poznań, Poland.
出版信息
Microb Ecol. 2013 Jan;65(1):84-90. doi: 10.1007/s00248-012-0101-3. Epub 2012 Aug 19.
Abstract
Ninety-six class 1 integron-positive and 96 integron-negative Escherichia coli isolates cultured from the water of the Warta River, Poland, were characterized for their phylogenetic group affiliation and for the presence of genes associated with virulence. Most strains belonged to phylogenetic group A, but phylogenetic group affiliation was not related with the presence of integrons. The occurrence of heat-stable toxin gene of enterotoxigenic E. coli, S fimbriae subunit gene sfaS, and siderophore receptor genes, fyuA and iutA, was associated with the presence of class 1 integrons. Moreover, virulence factor score (the total number of virulence-associated genes) was associated with the presence of integrons in groups. The results bring new insight into relations between the presence of integrons in E. coli, virulence traits, as well as phylogenetic group affiliation.
摘要
从波兰瓦尔塔河水中分离培养的 96 株 class 1 整合子阳性和 96 株整合子阴性大肠杆菌被鉴定为其进化群归属，并检测与毒力相关的基因。大多数菌株属于进化群 A，但进化群归属与整合子的存在无关。肠产毒性大肠杆菌耐热毒素基因、S 菌毛亚单位基因 sfaS 和铁载体受体基因 fyuA 和 iutA 的存在与 class 1 整合子的存在有关。此外，毒力因子评分（与毒力相关基因的总数）与整合子在群体中的存在有关。这些结果为大肠杆菌中整合子的存在、毒力特征以及进化群归属之间的关系提供了新的见解。
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