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Fluid Flow Induces Biofilm Formation in Staphylococcus epidermidis Polysaccharide Intracellular Adhesin-Positive Clinical Isolates

机译:流体流动诱导表皮葡萄球菌多糖胞内粘附素阳性临床分离物中的生物膜形成。

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Staphylococcus epidermidis is a common cause of catheter-related bloodstream infections, resulting in significant morbidity and mortality and increased hospital costs. The ability to form biofilms plays a crucial role in pathogenesis; however, not all clinical isolates form biofilms under normal in vitro conditions. Strains containing the ica operon can display significant phenotypic variation with respect to polysaccharide intracellular adhesin (PIA)-based biofilm formation, including the induction of biofilms upon environmental stress. Using a parallel microfluidic approach to investigate flow as an environmental signal for S. epidermidis biofilm formation, we demonstrate that fluid shear alone induces PIA-positive biofilms of certain clinical isolates and influences biofilm structure. These findings suggest an important role of the catheter microenvironment, particularly fluid flow, in the establishment of S. epidermidis infections by PIA-dependent biofilm formation.
机译:表皮葡萄球菌是导管相关的血流感染的常见原因,导致明显的发病率和死亡率,并增加了医院的费用。形成生物膜的能力在发病机理中起着至关重要的作用。然而,并非所有临床分离株在正常体外条件下均会形成生物膜。相对于基于多糖细胞内粘附素(PIA)的生物膜形成,包含ica操纵子的菌株可表现出明显的表型变异,包括在环境胁迫下诱导生物膜。使用并行的微流控方法来调查流量作为表皮葡萄球菌生物膜形成的环境信号,我们证明流体剪切单独诱导某些临床分离株的PIA阳性生物膜并影响生物膜结构。这些发现表明导管微环境,特别是流体流动,在通过PIA依赖性生物膜形成建立表皮葡萄球菌感染中起着重要作用。

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