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+ TSOPT 检查
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+ Dec 29, 2025
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+ <p>T-SPOT检查,其全称为T-SPOT.TB,是一种用于检测结核分枝杆菌感染的体外诊断血液检测技术。该方法属于一类被称为γ-干扰素释放试验(Interferon Gamma Release Assay, IGRA)的检测手段,旨在辅助医生诊断个体是否存在结核菌感染,包括活动性结核病和潜伏性结-核感染。此项检测并非直接寻找病原体,而是通过评估人体免疫系统对结核菌特定抗原的反应来做出间接判断,因此,其结果需要结合临床风险评估、影像学检查及其他医疗诊断信息进行综合解读。</p>
+<p>该检测的核心原理在于测量外周血中效应T淋巴细胞的功能。具体而言,检测过程中会分离患者血液中的单个核细胞,并在体外用两种结核分枝杆菌特异性抗原——早期分泌性抗原靶6(ESAT-6)和培养滤液蛋白10(CFP-10)——对其进行刺激。这两种蛋白由结核分枝杆菌表达,但绝大多数非结核分枝杆菌以及目前使用的所有卡介苗(BCG疫苗)菌株均不表达,这使得T-SPOT.TB检测相比于传统的结核菌素皮肤试验(TST)具有更高的特异性,能有效避免因卡介苗接种史或大多数非结核分枝杆菌感染而导致的假阳性结果。</p>
+<p>如果受检者的免疫系统曾经接触过结核分枝杆菌,其血液中会存在能够识别这些特异性抗原的效应T细胞。当这些T细胞在体外再次遇到ESAT-6和CFP-10时,会被激活并释放γ-干扰素(IFN-γ)。T-SPOT.TB检测利用一种名为酶联免疫斑点(ELISPOT)的技术,在微孔板中捕获并可视化这些由单个T细胞释放的γ-干扰素,形成可见的“斑点”。通过计数这些斑点的数量,可以量化对结核菌抗原敏感的T细胞的丰度,从而判断免疫系统是否对结核菌存在记忆反应。</p>
+<p>检测结果通常以阳性、阴性或临界(可疑)的形式报告。阳性结果表明受检者很可能感染了结核分枝杆菌;阴性结果则意味着未检测到对结核菌的免疫反应,提示可能没有感染;而临界结果则表示无法明确判断,可能建议重新进行检测或结合其他诊断方法进一步评估。由于其操作的标准化和对特定抗原的依赖,T-SPOT.TB被认为是一种重要的结核病辅助诊断工具,尤其适用于那些因免疫抑制状态(如HIV感染者或长期使用免疫抑制剂的患者)而导致结核菌素皮肤试验结果不可靠的人群。</p>
+<h3 id="参考文献"><a class="header-anchor" href="#参考文献">¶</a>参考文献</h3>
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