对三基因宿主反应特征的前性评估,以对儿童结核病严重程度进行分类
Brittney Sweetser1,2, Esin Nkereuwem3, Jascent Nakafeero4
1Division of Pulmonary Diseases & Critical Care Medicine, University of California, Irvine, Orange, USA.
概括
专家MTB-宿主反应 (HR) 测试显示,对儿童结核病严重程度的评估有希望,在老年儿童和确诊病例中接近目标准确度. 对于患有不太严重疾病的年轻儿童,需要进一步细化.
科学领域:
- 传染性疾病 传染性疾病
- 儿科医学 儿科医学
- 生物标志物发现发现
背景情况:
- 准确分层的儿科结核病 (TB) 严重程度对于适当的治疗至关重要,但缺乏点的护理工具.
- 短期治疗方案可能有利于非严重结核病的儿童,需要可靠的方法来区分疾病的严重程度.
研究的目的:
- 为了前性地评估Cepheid Xpert MTB-Host Response (HR) 原型盒子,以对肺结核 (PTB) 儿童结核病严重程度的分层能力进行评估.
- 评估Xpert-HR测试是否可以达到世界卫生组织 (WHO) 治疗优化目标准确度 (≥90%的灵敏度,≥70%的特异性).
主要方法:
- 一项前性研究涉及106名儿童 (<15岁),在冈比亚和乌干达确认或未确认的PTB.
- 严重程度是根据世卫组织为期四个月的药物敏感疗程指导方针来定义的.
- 血液样本使用HR卡片进行了测试,以PCR检测3个mRNA基因,生成结核病得分来分类严重的结核病.
主要成果:
- 在所有患有PTB的儿童中,Xpert-HR测试显示曲线下面面积 (AUC) 为0.67,敏感度为89.3%,特异性为29.5%.
- 在确诊结核病的儿童 (91.7%的灵敏度,62.5%的特异性) 和5-9岁的儿童 (100%的灵敏度,66.7%的特异性) 中观察到接近目标的准确性.
- 在未经证实的结核病 (24.3%) 和5岁以下 (28.2%) 的儿童中,特异性较低.
结论:
- 专家-HR测试显示,在老年儿童和确诊结核病患者中,有潜力对PTB严重程度进行分层,接近世卫组织目标准确度.
- 在未确认结核病的儿童和年轻儿童中,特异性较低,这表明需要进一步优化.
- 可能需要特定于儿童的宿主响应特征来提高在患有松杆菌性疾病的幼儿中测试的性能.
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