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Clostridioides difficile laboratory diagnostic techniques: a comparative approach of rapid and molecular methods
Archives of Microbiology ( IF 2.3 ) Pub Date : 2021-01-18 , DOI: 10.1007/s00203-020-02148-8
Thais Simões Camargo , Moacyr Silva Junior , Luis Fernando Aranha Camargo , Veronica Pivetta Biotto , André Mario Doi , Paula Celia Mariko Koga , Carolina Nunes França , Marines Dalla Valle Martino

Clostridioides difficile infection is a public health problem because of it is easily spread; with harmful consequences, it is essential to reduce hospital costs and prevent its dissemination by having a precise diagnosis. The gold standard for its diagnosis is polymerase chain reaction (PCR); however, the technique is not available for all laboratories due to the high cost. New approaches using non-molecular tests to detect C. difficile and toxin A/B production has been proposed to improve cost benefits. The objective of this study is to compare molecular methods (PCR) and rapid methods (immunochromatographic test and enzymatic immunoassay). A series of tests comprising these diagnostic techniques was performed with 50 patients with a clinical diagnosis for Clostridioides difficile on GeneXpert® devices test; a calculation of the sensitivity was executed, followed by a comparison of the efficiency of all techniques. Greater sensitivity was observed in the PCR-based methods (BD MAX™ and BioFire FilmArray®) and the GDH-based assays (RIDASCREEN® and Alere Techlab®). The proposed algorithm represents minor monetary disadvantages but a significant temporal optimization of 10%. Future studies concerning both positive and negative results could be advantageous because of the possibility of calculating more method concordance indexes, such as the specificity and Kappa index, in addition to being able to indicate a monetary profit if the proposed algorithm was applied due to the nonproceeding PCR cases.

中文翻译:

艰难梭菌实验室诊断技术:快速和分子方法的比较方法

艰难梭菌感染是一个公共卫生问题,因为它很容易传播;对于有害后果,必须通过准确诊断来降低医院成本并防止其传播。其诊断的金标准是聚合酶链反应 (PCR);然而,由于成本高昂,该技术并非适用于所有实验室。已提出使用非分子测试检测艰难梭菌和毒素 A/B 产生的新方法,以提高成本效益。本研究的目的是比较分子方法 (PCR) 和快速方法(免疫色谱测试和酶免疫测定)。对 50 名在 GeneXpert® 设备测试中临床诊断为艰难梭菌的患者进行了包含这些诊断技术的一系列测试;执行灵敏度计算,然后比较所有技术的效率。在基于 PCR 的方法(BD MAX™ 和 BioFire FilmArray®)和基于 GDH 的测定(RIDASCREEN® 和 Alere Techlab®)中观察到更高的灵敏度。所提出的算法表现出轻微的货币劣势,但显着的时间优化为 10%。未来关于正面和负面结果的研究可能是有利的,因为除了由于非继续进行而应用所提出的算法时能够指示货币利润之外,还可以计算更多的方法一致性指数,例如特异性和 Kappa 指数。 PCR 案例。在基于 PCR 的方法(BD MAX™ 和 BioFire FilmArray®)和基于 GDH 的测定(RIDASCREEN® 和 Alere Techlab®)中观察到更高的灵敏度。所提出的算法表现出轻微的货币劣势,但显着的时间优化为 10%。未来关于正面和负面结果的研究可能是有利的,因为除了由于非继续进行而应用所提出的算法时能够指示货币利润之外,还可以计算更多的方法一致性指数,例如特异性和 Kappa 指数。 PCR 案例。在基于 PCR 的方法(BD MAX™ 和 BioFire FilmArray®)和基于 GDH 的测定(RIDASCREEN® 和 Alere Techlab®)中观察到更高的灵敏度。所提出的算法表现出轻微的货币劣势,但显着的时间优化为 10%。未来关于正面和负面结果的研究可能是有利的,因为除了由于非继续进行而应用所提出的算法时能够指示货币利润之外,还可以计算更多的方法一致性指数,例如特异性和 Kappa 指数。 PCR 案例。
更新日期:2021-01-18
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