AIM: To elucidate the different serological reactions to H pylori using the immunoblotting technique for further understanding of its pathogenic role in gastric cancer. METHODS: A total of 54 patients were divided i...AIM: To elucidate the different serological reactions to H pylori using the immunoblotting technique for further understanding of its pathogenic role in gastric cancer. METHODS: A total of 54 patients were divided into two groups after upper gastrointestinal endoscopy: normal control group (25 patients) and gastric cancer group (29 patients). Both groups were further divided into Hpylori (+) and H pylori (-) subgroups based on the results of CLO test, Giemsa staining and culture. Sera were further analyzed with the immunoblotting technique (HelicoBIot 2.0, Genelabs Diagnostics, Singapore). RESULTS: The positive rate of the immunoblotting test was as high as 88.9% in the H pylori (-) gastric cancer group and only 14.3% in the H pylori (-) normal control group with a statistically significant difference. CONCLUSION: The prevalence of H pylori infection is higher in gastric cancer patients than in the normal controls, suggesting that H pylori may play a role in the pathogenesis of gastric cancer.展开更多
目的确定丙型肝炎病毒(hepatitis C virus,HCV)抗体阳性预测值≥95%的最佳吸光度/临界值(signal-to-cutoff,S/CO),确定首都医科大学附属北京地坛医院实验室医学决定水平,为探索不同系统丙型肝炎病毒抗体检测试剂95%阳性置信区间建立方...目的确定丙型肝炎病毒(hepatitis C virus,HCV)抗体阳性预测值≥95%的最佳吸光度/临界值(signal-to-cutoff,S/CO),确定首都医科大学附属北京地坛医院实验室医学决定水平,为探索不同系统丙型肝炎病毒抗体检测试剂95%阳性置信区间建立方法学。方法收集2021年7月至2022年2月门诊及住院患者进行化学发光免疫分析法(chemiluminescence analysis,CLIA)初筛检测同时进行HCV RNA检测的血浆样本共282例,其中抗体初筛有反应性(S/CO≥1)样本252例,阴性样本30例,进行重组免疫印记试验(recombinant immunoblot assay,RIBA)并查阅其HCV RNA检测结果,通过受试者工作特征(receiver operating characteristic,ROC)曲线得到预测本实验室阳性预测值≥95%时HCV感染的抗体S/CO值。结果初筛为阴性的30例样本双重确证试验结果均为阴性;排除16例HCV感染史不明确的样本,丙型肝炎病毒抗体S/CO≥1的236例样本经双重确证试验得到真阳性样本188例,阴性样本48例,经ROC曲线分析,本实验室阳性预测值≥95%时,本实验室抗体S/CO值为7.83,灵敏度为93.09%,特异度为95.83%,曲线下面积(area under the curve,AUC)为0.98(P<0.0001)。结论为临床提供本实验室阳性预测值≥95%时HCV感染抗体的S/CO值以协助临床诊疗。展开更多
目的探讨结核感染T细胞斑点试验(enzyme-linked immunospot assay in detection of mycobacterium tuberculosis infection,T-SPOT.TB)在临床诊断结核性腹膜炎中的应用价值。方法对临床明确诊断结核性腹膜炎及可疑结核性腹膜炎患者(n=37...目的探讨结核感染T细胞斑点试验(enzyme-linked immunospot assay in detection of mycobacterium tuberculosis infection,T-SPOT.TB)在临床诊断结核性腹膜炎中的应用价值。方法对临床明确诊断结核性腹膜炎及可疑结核性腹膜炎患者(n=37)同时实施T-SPOT.TB、结核菌素试验(PPD)、结核抗体、血清腺苷脱胺酶(ADA)等检测,同时设非结核性腹膜炎患者为对照组(n=25)。结果利用T-SPOT.TB试验诊断结核性腹膜炎的阳性率为97.3%(36/37),明显高于PPD的45.5%(15/33)、结核抗体检查的15.2%(5/33)、血清ADA的33.3%(7/21),差异有统计学意义(P<0.01)。T-SPOT.TB试验诊断结核性腹膜炎的敏感性和特异性分别为97.3%和92.0%,显著高于PPD的45.5%和61.9%,差异有统计学意义(P<0.01)。结论 T-SPOT.TB酶联免疫斑点法是一种具有较高敏感性和特异性的检测结核感染的技术,对快速而准确地诊断结核性腹膜炎具有重要的临床应用价值。展开更多
文摘AIM: To elucidate the different serological reactions to H pylori using the immunoblotting technique for further understanding of its pathogenic role in gastric cancer. METHODS: A total of 54 patients were divided into two groups after upper gastrointestinal endoscopy: normal control group (25 patients) and gastric cancer group (29 patients). Both groups were further divided into Hpylori (+) and H pylori (-) subgroups based on the results of CLO test, Giemsa staining and culture. Sera were further analyzed with the immunoblotting technique (HelicoBIot 2.0, Genelabs Diagnostics, Singapore). RESULTS: The positive rate of the immunoblotting test was as high as 88.9% in the H pylori (-) gastric cancer group and only 14.3% in the H pylori (-) normal control group with a statistically significant difference. CONCLUSION: The prevalence of H pylori infection is higher in gastric cancer patients than in the normal controls, suggesting that H pylori may play a role in the pathogenesis of gastric cancer.
文摘目的确定丙型肝炎病毒(hepatitis C virus,HCV)抗体阳性预测值≥95%的最佳吸光度/临界值(signal-to-cutoff,S/CO),确定首都医科大学附属北京地坛医院实验室医学决定水平,为探索不同系统丙型肝炎病毒抗体检测试剂95%阳性置信区间建立方法学。方法收集2021年7月至2022年2月门诊及住院患者进行化学发光免疫分析法(chemiluminescence analysis,CLIA)初筛检测同时进行HCV RNA检测的血浆样本共282例,其中抗体初筛有反应性(S/CO≥1)样本252例,阴性样本30例,进行重组免疫印记试验(recombinant immunoblot assay,RIBA)并查阅其HCV RNA检测结果,通过受试者工作特征(receiver operating characteristic,ROC)曲线得到预测本实验室阳性预测值≥95%时HCV感染的抗体S/CO值。结果初筛为阴性的30例样本双重确证试验结果均为阴性;排除16例HCV感染史不明确的样本,丙型肝炎病毒抗体S/CO≥1的236例样本经双重确证试验得到真阳性样本188例,阴性样本48例,经ROC曲线分析,本实验室阳性预测值≥95%时,本实验室抗体S/CO值为7.83,灵敏度为93.09%,特异度为95.83%,曲线下面积(area under the curve,AUC)为0.98(P<0.0001)。结论为临床提供本实验室阳性预测值≥95%时HCV感染抗体的S/CO值以协助临床诊疗。
文摘目的探讨结核感染T细胞斑点试验(enzyme-linked immunospot assay in detection of mycobacterium tuberculosis infection,T-SPOT.TB)在临床诊断结核性腹膜炎中的应用价值。方法对临床明确诊断结核性腹膜炎及可疑结核性腹膜炎患者(n=37)同时实施T-SPOT.TB、结核菌素试验(PPD)、结核抗体、血清腺苷脱胺酶(ADA)等检测,同时设非结核性腹膜炎患者为对照组(n=25)。结果利用T-SPOT.TB试验诊断结核性腹膜炎的阳性率为97.3%(36/37),明显高于PPD的45.5%(15/33)、结核抗体检查的15.2%(5/33)、血清ADA的33.3%(7/21),差异有统计学意义(P<0.01)。T-SPOT.TB试验诊断结核性腹膜炎的敏感性和特异性分别为97.3%和92.0%,显著高于PPD的45.5%和61.9%,差异有统计学意义(P<0.01)。结论 T-SPOT.TB酶联免疫斑点法是一种具有较高敏感性和特异性的检测结核感染的技术,对快速而准确地诊断结核性腹膜炎具有重要的临床应用价值。