相关实验视频
Updated: Jan 18, 2026

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Diagnosing Pulmonary Tuberculosis with the Xpert MTB/RIF Test
Published on: April 9, 2012
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通过Cepheid Xpert MTB/RIF Ultra测试舌头拭片样本:对来自低细菌负荷结核病患者的样本应用的两个协议的比较
medRxiv : the preprint server for health sciences
|June 4, 2025
概括
使用Xpert Ultra进行结核病 (TB) 诊断的新舌头扫描协议显示,与标准加热方法相比,灵敏度有所提高. 这种简单的方法为分子结核病检测提供了一个有希望的替代方案.
科学领域:
- 医学诊断 医学诊断 医学诊断
- 分子生物学分子生物学
- 传染性疾病 传染性疾病
背景情况:
- 舌头拭子 (TS) 正在成为用于分子结核病 (TB) 诊断的非吐标本.
- 塞菲德Xpert MTB/RIF Ultra® (Xpert Ultra) 试验被广泛使用,但与手动qPCR相比,TS的灵敏度有限.
- 需要使用Xpert Ultra进行TS分析的简化,敏感的协议.
研究的目的:
- 为了评估一个易于使用,无加热的协议 (2:1 SR) 用Xpert Ultra.分析舌头拭子 (TS).
- 为了比较2:1 SR方法的诊断准确性与TS分析的标准加热协议 (Heat+TE).
- 评估单样样本测试与双样样本测试对TS分析对结核病检测敏感性的影响.
主要方法:
- 一项对照性比较研究,使用先前从有症状的南非患者中收集的TS.
- 样品使用Heat+TE协议和Xpert Ultra上的新型2:1 SR协议进行分析.
- 诊断的准确性与唾液微生物学参考标准 (MRS) 相对评估,优先考虑来自低细菌负载患者的样本.
主要成果:
- 在低细菌负荷的参与者中,2:1 SR方法表现出更高的灵敏度 (52.3%),而不是热+TE方法 (42.5%).
- 这两种方法均表现出100%的特异性.
- 在更广泛的队列中,双TS采样 (81.3%的灵敏度) 比单样样本测试 (75.5%) 更敏感.
结论:
- 使用Xpert Ultra进行舌头扫描分析的新型2:1 SR协议比标准加热方法更敏感.
- 这种无加热的协议为使用舌头拭子进行分子结核病诊断提供了实际的改进.
- 双舌头抽样样本可以提高结核病的检测.
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