食品加工环境中分离的李斯特菌形成两个系统发育谱系。
Listeria seeligeri isolates from food processing environments form two phylogenetic lineages.
机构信息
Lehrstuhl für Mikrobiologie, Universität Bayreuth, Universitätsstrasse 30, Bayreuth, Germany.
出版信息
Appl Environ Microbiol. 2010 May;76(9):3044-7. doi: 10.1128/AEM.02243-09. Epub 2010 Mar 12.
Abstract
Seven different actA subtypes forming two phylogenetic lineages could be distinguished by sequencing the actA gene of Listeria seeligeri isolates from different habitats. Isolates of the two lineages differ in hemolytic as well as phospholipase activities and in the arrangement of the virulence gene cluster. The presence of a serine protease gene resembling orf2110 of L. monocytogenes in some isolates further supports the hypothesis that L. seeligeri is subject to ongoing adaptation to changing environments.
摘要
通过对不同生境来源的李斯特菌 seeligeri 分离株的 actA 基因测序，可以区分出七种不同的 actA 亚型，形成两个系统发育谱系。这两个谱系的分离株在溶血活性、磷脂酶活性以及毒力基因簇的排列上存在差异。一些分离株中存在类似于单核细胞增生李斯特菌 orf2110 的丝氨酸蛋白酶基因，这进一步支持了李斯特菌 seeligeri 正在适应不断变化的环境的假说。
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