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首页> 外文期刊>Applied Microbiology >Stochasticity of Bacterial Attachment and Its Predictability by the Extended Derjaguin-Landau-Verwey-Overbeek Theory
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Stochasticity of Bacterial Attachment and Its Predictability by the Extended Derjaguin-Landau-Verwey-Overbeek Theory

机译：扩展的Derjaguin-Landau-Verwey-Overbeek理论对细菌依附性的随机性及其可预测性

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Bacterial attachment onto materials has been suggested to be stochastic by some authors but nonstochastic and based on surface properties by others. We investigated this by attaching pairwise combinations of two Salmonella enterica serovar Sofia ( S . Sofia) strains (with different physicochemical and attachment properties) with one strain each of S. enterica serovar Typhimurium, S. enterica serovar Infantis, or S. enterica serovar Virchow (all with similar physicochemical and attachment abilities) in ratios of 0.428, 1, and 2.333 onto glass, stainless steel, Teflon, and polysulfone. Attached bacterial cells were recovered and counted. If the ratio of attached cells of each Salmonella serovar pair recovered was the same as the initial inoculum ratio, the attachment process was deemed stochastic. Experimental outcomes from the study were compared to those predicted by the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory. Significant differences ( P < 0.05) between the initial and the attached ratios for serovar pairs containing S . Sofia S1296a for all different ratios were apparent for all materials. For S . Sofia S1635-containing pairs, 7 out of 12 combinations of serovar pairs and materials had attachment ratios not significantly different ( P > 0.05) from the initial ratio of 0.428. Five out of 12 and 10 out of 12 samples had attachment ratios not significantly different ( P > 0.05) from the initial ratios of 1 and 2.333, respectively. These results demonstrate that bacterial attachment to different materials is likely to be nonstochastic only when the key physicochemical properties of the bacteria were significantly different ( P < 0.05) from each other. XDLVO theory could successfully predict the attachment of some individual isolates to particular materials but could not be used to predict the likelihood of stochasticity in pairwise attachment experiments.
机译：一些作者建议细菌附着在材料上是随机的，但不是随机的，而另一些作者则基于表面性质。我们通过将两个沙门氏菌沙门氏菌Sofia（S. Sofia）菌株（具有不同的理化性质和附着特性）与每一个沙门氏菌鼠伤寒鼠伤寒沙门氏菌，肠炎沙门氏菌Infantis或肠炎沙门氏菌Virchow的一对菌株成对组合进行调查（均具有相似的理化和附着能力），它们在玻璃，不锈钢，特氟隆和聚砜上的比率分别为0.428、1和2.333。回收附着的细菌细胞并计数。如果回收的每个沙门氏菌血清对的附着细胞比率与初始接种物比率相同，则认为附着过程是随机的。将研究的实验结果与扩展的Derjaguin-Landau-Verwey-Overbeek（XDLVO）理论预测的结果进行了比较。含S的血清型对的初始比率与附加比率之间的显着差异（P <0.05）。对于所有材料，所有不同比例的Sofia S1296a都很明显。对于S。含索非亚S1635的对，血清型对和材料的12种组合中的7种与原始比率0.428的附着率没有显着差异（P> 0.05）。 12个样本中有5个和12个样本中有10个的附着率分别与初始比率1和2.333没有显着差异（P> 0.05）。这些结果表明，只有当细菌的关键理化特性彼此之间存在显着差异（P <0.05）时，细菌对不同材料的附着才可能是非随机的。 XDLVO理论可以成功地预测某些分离株对特定材料的附着，但不能用于预测成对附着实验中随机性的可能性。

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