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CLIN CHEM:直接从全血进行广泛的细菌检测,鉴定和抗菌敏感性测试

2018-10-29 MedSci MedSci原创

血液中病原体检测,鉴定(ID)和抗菌药物敏感性测试(AST)所需的时间目前并不能满足急需的疾病管理。传统方法ID和AST需要多达3天。分子诊断方法可减少ID的时间,但是它们取代培养的理想情况尚未实现,因为AST仍然很慢。在此,研究人员开发了基于组合定量PCR(qPCR)的ID + AST检测方法,并发现该方法具有领先的院内细菌病原体的顺序检测,ID和AST。 该方法通过(a)去除血细胞,(b

血液中病原体检测,鉴定(ID)和抗菌药物敏感性测试(AST)所需的时间目前并不能满足急需的疾病管理。传统方法IDAST需要多达3天。分子诊断方法可减少ID的时间,但是它们取代培养的理想情况尚未实现,因为AST仍然很慢。在此,研究人员开发了基于组合定量PCRqPCR)的ID + AST检测方法,并发现该方法具有领先的院内细菌病原体的顺序检测,IDAST

该方法通过(a)去除血细胞,(b)短暂的细菌富集,(c)细菌检测和ID,以及(d)物种特异性抗微生物处理,对全血样品进行ID + AST 。通过广谱qPCR扩增16S23S之间的内部转录间隔区的用于检测。通过高分辨率熔化曲线分类识别物种。通过处理和未处理样品之间的Ct差异实现AST

研究结果显示,鲍曼不动杆菌,大肠埃希菌,肺炎克雷伯菌和金黄色葡萄球菌的检出下限为1 CFU / mL 。通过独特的熔解曲线课精确鉴定所有物种。用≥1个循环的Ct差异鉴定抗微生物最小抑制浓度。使用RNA靶标使得允许AST孵育时间从60分钟减少至5分钟。快速循环扩增使qPCR时间缩短了83%至30分钟。

研究表明通过联合,顺序ID + AST方案可以快速可靠地开展检测,IDAST用于诊断血流感染,通过第二剂抗菌药物可以将经验转化为靶向治疗。

原始出处:

Nadya Andini, Anne Hu, A “Culture” Shift: Broad Bacterial Detection, Identification, and Antimicrobial Susceptibility Testing Directly from Whole Blood

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    2018-11-04 吴教授

    学习了,学习了,学习了

    0

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    2018-10-30 txqjm

    谢谢了,学习

    0

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    2018-10-29 天地飞扬

    了解一下,谢谢分享!

    0

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    2018-10-29 惠映实验室

    学习了,谢谢分享。

    0

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