血Mycobacterium tuberculosis无细胞DNA测定:用于结核淋巴腺炎的诊断工具
Sosina Ayalew1,2, Teklu Wegayehu2, Biniam Wondale2
1Armauer Hansen Research Institute, Addis Ababa, Ethiopia.
Infectious diseases (London, England)
|March 13, 2025
概括
菌结核菌无细胞DNA在诊断结核淋巴腺炎方面显示出有前途. 这种不那么侵入性测试补充了现有的方法,在一半以上的患者中检测到细菌.
科学领域:
- 传染性疾病 传染性疾病
- 分子诊断学 分子诊断学
- 微生物学 微生物学
背景情况:
- 诊断结核淋巴腺炎往往在细菌确认方面存在挑战.
- 目前用于结核淋巴腺炎的诊断方法可能是侵入性的和耗时的.
研究的目的:
- 评估 Mycobacterium 结核病无细胞DNA 作为结核病淋巴腺炎的诊断工具.
- 与已确定的诊断技术相比,评估一种新的无细胞DNA测定方法的灵敏度和特异性.
主要方法:
- 开发了一种定量PCR试验,用于检测血中的Mycobacterium结核病无细胞DNA,准IS6110,IS1081和cyp141基因.
- 这项研究招募了95名怀疑患有结核淋巴腺炎的患者和60名对照患者.
- 测试性能与细针吸收GeneXpert Ultra,培养和细胞学进行了评估.
主要成果:
- 无血细胞DNA测定检测到Mycobacterium结核病在65.3%的结核淋巴炎患者 (70.4%的确诊病例,50%的可能病例),具有91.1%的特异性.
- 个别基因标显示出不同的敏感性,IS1081显示出最高的51.6%.
- 将无细胞DNA测定与精细针吸收培养和GeneXpert Ultra结合起来,诊断灵敏度分别提高到76.8%和85.3%.
结论:
- 结核菌的无细胞DNA可在大量结核淋巴腺炎患者中检测到.
- 无血细胞DNA测定为目前基于细针吸入的结核淋巴腺炎诊断提供了有价值的,不那么侵入性的补充.
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