Hydrodynamic surface interactions enable Escherichia coli to seek efficient routes to swim upstream
Hydrodynamic surface interactions enable Escherichia coli to seek efficient routes to swim upstream
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DOI：
10.1103/physrevlett.98.068101
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发表时间：
2007-02-09
影响因子：
8.6
通讯作者：
Koser, Hur
中科院分区：
文献类型：
--
作者：
Hill, Jane;Kalkanci, Ozge;Koser, Hur
大肠杆菌在表面附近的剪切流中表现出稳定的倾向，向该表面的左侧（在相对坐标系内）游泳。这种现象仅取决于表面上的局部剪切速率，并导致细胞最终排列并在各种流动条件下优先沿着左侧壁或缝隙向上游游动。结果表明，流动辅助翻译和上游游泳沿着表面可能是相关的细菌运输的各种模式，如肾盂肾炎和细菌迁移在潮湿的土壤和水生环境中一般。
Escherichia coli in shear flow near a surface are shown to exhibit a steady propensity to swim towards the left (within the relative coordinate system) of that surface. This phenomenon depends solely on the local shear rate on the surface, and leads to cells eventually aligning and swimming upstream preferentially along a left sidewall or crevice in a wide range of flow conditions. The results indicate that flow-assisted translation and upstream swimming along surfaces might be relevant in various models of bacterial transport, such as in pyelonephritis and bacterial migration in wet soil and aquatic environments in general.