结核感染T细胞斑点试验在手、腕部腱鞘结核诊断中的应用评价

目的 探讨结核感染T细胞斑点试验(T-cell spot of Tuberculosis,T-SPOT.TB)在手、腕部腱鞘结核诊断中的临床应用价值.方法 通过对2012年1月至2018年1月我院收集64例怀疑手、腕部腱鞘结核临床资料进行回顾性分析,根据病理诊断及临床表现判断有无结核分枝杆菌感染;全部病例均经过T-SP...     

T-SPOT.TB、TB-DNA、PPD、TB-DOT/TB-CK检测在结核病诊断中的临床价值

目的评价T-SPOT.TB、TB-DNA、PPD、TB-DOT/TB-CK检测在结核病诊断中的临床应用价值.方法利用T-SPOT.TB技术,测定120例确诊结核病患者,62例非结核疾病患者外周血单个核细胞中结核感染特异的效应T淋巴细胞的频率.同时检测两组患者的TB-DNA、PPD和TB-DOT/TB-CK.结果 T-SPOT.TB敏感性、特异性分别为88.3%、91.9%,TB-DNA敏感性、特异性分别为75.9%、98.2%,PPD敏感性、特异性分别为62.4%、71.9%,TB-DOT/TB-CK敏感性、特异性分别为76.3%、80%.结论 T-SPOT.TB较其它传统方法TB-DNA、PPD、TB-DOT/TB-CK对结核病诊断有高度的敏感性和特异性,值得临床推广.     

结核感染T细胞斑点试验在骨与关节结核诊断中的价值

目的探讨结核感染T细胞斑点试验(T-SPOT TB)在临床诊断骨与关节结核的应用价值。方法收集154例疑似骨与关节结核患者外周抗凝血标本,依据细菌学检验、病理学结果及临床表现判定有无结核分枝杆菌感染;其中确诊骨与关节结核73例,非结核感染81例,分别进行T-SPOT TB和结核抗体(TB-Ab)检测,并分析T-SPOT TB在骨与关节结核诊断中的敏感度和特异度。结果 73例确诊骨与关节结核中,64例T-SPOT TB阳性;81例非结核中,72例T-SPOT TB阴性;T-SPOT TB检测敏感度为87.67%(64/73),TB-Ab为41.10%(30/73),T-SPOT TB诊断骨与关节结核的敏感度显著高于TB-Ab(P0.001);T-SPOT TB检测特异度为88.89%(72/81),TB-Ab为71.60%(58/81),T-SPOT TB特异度也高于TB-Ab(P=0.006)。在结核组中,涂阳与涂阴两组T-SPOT TB阳性检出率分别为95.45%(21/22)及86.49%(32/37),差异无统计学意义(P0.05)。在结核组中,病理诊断阳性率92.16%(47/51)与T-SPOT TB总阳性率87.67%(64/73)比较差异无统计学意义(P0.05)。结论 T-SPOT TB在诊断骨与关节结核中具有良好的敏感度和特异度,具有重要临床应用价值。     

Factors associated with differential T cell responses to antigens ESAT-6 and CFP-10 in pulmonary tuberculosis patients

The T-SPOT.TB assay detects cellular immune responses to 2 core Mycobacterium tuberculosis antigens, early secreted antigenic target of 6-kDa protein (ESAT-6) and culture filtrate protein-10 (CFP-10). T-SPOT.TB has been recently used for auxiliary diagnosis of active pulmonary tuberculosis (PTB). However, testing can produce inconsistent results due to differential PTB patient immune responses to these antigens, prompting us to identify factors underlying inconsistent results.Data were retrospectively analyzed from 1225 confirmed PTB patients who underwent T-SPOT.TB testing at 5 specialized tuberculosis hospitals in China between December 2012 and November 2015. Numbers of spot-forming cells (SFCs) reflecting T cell responses to ESAT-6 and CFP-10 antigens were recorded then analyzed via multivariable logistic regression to reveal factors underlying discordant T cell responses to these antigens.The agreement rate of 84.98% (82.85%–86.94%) between PTB patient ESAT-6 and CFP-10 responses demonstrated high concordance. Additionally, positivity rates were higher for ESAT-6 than for CFP-10 (84.8% vs 80.7%, P < .001), with ESAT-6 and CFP-10 microwell SFC numbers for each single positive group not differing significantly (P > .99), while spot numbers of the single positive group were lower than numbers for the double positive group (P < .001). Elderly patients (aged ≥66 years) and patients receiving retreatment were most likely to have discordance results.ESAT-6 promoted significantly more positive T-SPOT.TB results than did CFP-10 in PTB patients. Advanced age and retreatment status were correlated with discordant ESAT-6 and CFP-10 results. Assessment of factors underlying discordance may lead to improved PTB diagnosis using T-SPOT.TB.     

Diagnóstico de la infección tuberculosa en pacientes inmunodeprimidos y/o candidatos a terapias biológicas mediante el uso combinado de dos pruebas IGRA: T-SPOT.TB/QuantiFERON TB Gold In-Tube vs. T-SPOT.TB/QuantiFERON TB Gold Plus

IntroductionThe diagnosis of latent tuberculous infection (LTI) by IGRA continues to generate debate. Experience in the simultaneous use of 2 IGRA tests is scant. The aim of this study was to compare the results of 2 versions of QuantiFERON-TB Gold (In-Tube/Plus) with those of T-SPOT.TB, and to analyse the effectiveness of a dual strategy (T-SPOT.TB + QTF) for the diagnosis of LTI in an immunosuppressed population.MethodsWe conducted a prospective study (May 2015-June 2017) that included 2,999 immunosuppressed patients and/or candidates for biologics, in whom 2 simultaneous IGRA tests were performed: Group 1 (1535 patients): T-SPOT.TB + QuantiFERON-TB Gold-In-Tube (QTF-GIT); Group 2 (1464 patients): T-SPOT.TB + QuantiFERON-TB Gold Plus (QTF-Plus).ResultsThe concordance between QTF-GIT and T-SPOT.TB was 83.19% (κ=0.532). The percentage of positive, negative, and indeterminate results were, respectively: 14.33% vs. 17.06%; 82.41% vs. 74.46%; and 3.25% vs. 8.46%. The concordance between QTF-Plus and T-SPOT.TB was 87.56% (κ=0.609). The percentage of positive, negative, and indeterminate results were, respectively: 15.02% vs. 15.36%; 82.92% vs. 79.37%; and 2.04% vs. 5.25%. Discrepancies between T-SPOT.TB and QTF-Plus were 12.43%, suggesting that 103 patients were positive and another 79 were negative due exclusively to 1 of the 2 IGRAs.ConclusionsGreater concordance was found between QTF-Plus and T-SPOT.TB than between QTF-GIT and T-SPOT.TB. However, we believe that the proportion of discrepancies between T-SPOT.TB and QTF-Plus is sufficiently important from a clinical point of view to justify the simultaneous use of 2 IGRA in this specific patient group.     

T-SPOT.TB在涂阴肺结核中的快速诊断价值

目的评价结核感染T细胞试验(T-SPOT.TB)在涂阴肺结核病诊断上的价值。方法利用T-SPOT.TB、TBDNA、TB-DOT 3种结核病诊断方法对112例确诊涂阴肺结核病患者和60例非结核病对照者分别进行检测。结果 T-SPOT.TB试验检测灵敏度为88.3%,TB-DNA、TB-DOT的灵敏度依次为25.9%、58.9%,与T-SPOT.TB试验相比,差异均有统计学意义(χ2=86.6,P0.05;χ2=23.3,P0.05);T-SPOT.TB试验特异度为96.7%,显著高于TB-DOT(78.3%),差异有统计学意义(χ~2=9.22,P0.05)。结论 T-SPOT.TB对涂阴肺结核病的敏感性和特异性都有明显的优势,可以作为涂阴肺结核病早期诊断的一种辅助检查手段,具快速准确的诊断价值。     

Xpert MTB/RIF和T-SPOT.TB对涂阴肺结核诊断价值的评估

目的评估并比较Xpert MTB/RIF和T-SPOT.TB对涂阴肺结核的诊断价值。方法收集2014年12月至2015年12月天津市海河医院门诊和住院的呼吸疾病患者208例,分为结核组125例和对照组83例,同时对其痰液样本行涂片镜检、液体快速培养和Xpert MTB/RIF检测,对其血液样本行T-SPOT.TB试验。结果 Xpert MTB/RIF诊断涂阴肺结核的敏感性、特异性、ROC曲线下面积(AUC)及优势比(odds ratio,OR)分别为56.5%(95%CI:45.8%~66.8%)、98.8%(95%CI:93.5%~100.0%)、0.777(95%CI:0.708~0.836)及106.60(χ~2=62.87,P0.01);T-SPOT.TB诊断涂阴肺结核的敏感性、特异性、AUC及OR值分别为83.7%(95%CI:74.5%~90.5%)、62.7%(95%CI:51.3%~73.0%)、0.732(95%CI:0.660~0.796)及8.61(χ~2=39.44,P0.01);两者敏感性(χ~2=18.58)和特异性(χ~2=28.03)的差异有统计学意义(P0.05),AUC的差异无统计学意义(Z=1.235,P0.05);Xpert MTB/RIF阴性的涂阴肺结核患者T-SPOT.TB阳性率为70.0%。结论 Xpert MTB/RIF和T-SPOT.TB均有助于早期、快速、准确地辅助诊断肺结核,T-SPOT.TB可以作为Xpert MTB/RIF的后续试验辅助诊断Xpert MTB/RIF阴性的涂阴肺结核。     

皮肤非结核分枝杆菌感染三例

目的评价T-SPOT.TB在皮肤非结核分枝杆菌感染中的诊断价值。方法对3例拟诊为游泳池肉芽肿的患者在治疗前后进行T-SPOT.TB检测。结果例1显示相对分子质量6 000早期分泌靶向抗原(ESAT-6)阴性,相对分子质量10 000培养滤过蛋白肽段库(CEP-10)阳性;例2显示ESAT-6及CEP-10均阳性;例3显示ESAT-6阳性,CEP-10阴性。3例患者经过口服利福喷丁、乙胺丁醇和克拉霉素治疗4个月,皮损均获得痊愈。治疗后检测T-SPOT.TB,例1和例3阳性结果全部转阴。结论初步研究显示,在拟诊皮肤非结核分枝杆菌感染中检测T-SPOT.TB在快速和准确诊断方面有重要的参考意义。     

结核感染T细胞斑点试验在血液病合并结核中的诊断价值

目的评价结核感染T细胞斑点试验（T-SPOT．TB）在血液病合并结核感染患者中的诊断价值。方法应用T-SPOT．TB对2012年3月-2013年4月间收治的82例结核感染待排的血液病患者外周血标本进行检测。结果T．SPOT．TB检测对于血液病患者合并结核感染的阳性检出率为59．09％（13／22）,明显高于结核抗体检测的13．64％（3／22）,P〈0．05。T-SPOT．TB检测血液病患者合并结核感染的灵敏度和特异度分别为59．09％（13／22）、68．33％（41／60）,灵敏度优于结核抗体检测（P〈0．05）。结论T-SPOT．TB检测对于血液病患者合并结核感染具有较大的辅助诊断价值,对于确诊结核感染阳性患者的诊断价值大于确诊结核感染阴性患者的诊断价值,临床上可作为血液病患者合并菌阴结核感染的辅助诊断。