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Underestimation of the incremental diagnostic yield of HIV-associated tuberculosis in studies of the Determine TB-LAM Ag urine assay

机译:确定TB-LAM Ag尿液测定法研究中低估了HIV相关结核病的诊断增量

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摘要

We read with interest the study from Uganda reported by Shah et al [1] regarding the diagnosis of tuberculosis (TB) among HIV-infected patients, most of whom were hospital in-patients. Using a culture-based reference standard, the diagnostic yields from testing sputum samples with fluorescence microscopy and the Xpert MTB/RIF assay were compared with the yield from testing urine using a simple lateral-flow assay (Determine TB-LAM Ag; Alere Inc., Waltham, Massachusetts, USA). The latter is a low-cost, point-of-care test that provides a rapid diagnosis of TB by detection of lipoarabinomannan (LAM) in urine. This is emerging as a useful diagnostic tool among defined subgroups of HIV-infected patients with low CD4+ cells counts, poor prognostic characteristics (e.g. advanced anaemia), and those with highest risk of death [2-5].
机译:我们感兴趣地阅读了Shah等人[1]从乌干达报告的有关在HIV感染患者中诊断结核病的研究,其中大多数是住院患者。使用基于培养物的参考标准,将使用荧光显微镜和Xpert MTB / RIF分析法检测痰液样品的诊断产率与使用简单侧流分析法(尿素TB-LAM Ag; Alere Inc. (美国马萨诸塞州沃尔瑟姆)。后者是一种低成本的即时护理测试,可通过检测尿液中的脂质阿拉伯甘露聚糖(LAM)来快速诊断结核病。这正在成为CD4 +细胞计数低,预后不良(例如晚期贫血)和死亡风险最高的HIV感染患者的特定亚组中的一种有用的诊断工具。

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