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首页> 外文期刊>Journal of Clinical Microbiology >In vitro quantitative model of catheter infection during simulated parenteral nutrition.
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In vitro quantitative model of catheter infection during simulated parenteral nutrition.

机译:模拟肠胃外营养期间导管感染的体外定量模型。

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We developed a quantitative in vitro model of catheter infection. Colonization was initiated by inoculating the catheter lumen with a small number of bacteria (approximately 5 x 10(3) viable organisms). Then the inoculated catheters were used for simulated total parenteral nutrition therapy consisting of infusions for 9 h a day, and bacteria were counted in the effluent fluid against time, enabling us to monitor catheter colonization quantitatively. Bacterial colonization of prosthetic devices is a progressive process, as evidenced by the slow day-to-day increase of bacterial release seen here. On the other hand, bacterial strains of various representative species exhibited significant differences in their ability to infect catheters. These results suggest that the in vitro model presented here is a reliable tool for monitoring the degree of catheter colonization under standardized conditions and could be used for further studying the main factors of catheter-related sepsis or the treatment of this information.
机译:我们开发了导管感染的体外定量模型。通过用少量细菌(大约5 x 10(3)活菌)接种导管内腔来开始定植。然后将已接种的导管用于模拟全肠外营养疗法,包括每天9小时的输液,并根据时间对流出液中的细菌进行计数,从而使我们能够定量监测导管的定植情况。假体装置的细菌定殖是一个渐进过程,如此处所见,细菌释放的每日缓慢增加证明了这一点。另一方面,各种代表性物种的细菌菌株在感染导管的能力上表现出显着差异。这些结果表明,此处介绍的体外模型是监测标准化条件下导管定植程度的可靠工具,可用于进一步研究导管相关败血症的主要因素或对该信息的治疗。

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