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诊断 pertussis 的分子方法:一个与 Bordetella bronchiseptica 混的情况
Christopher M Zarbock1, Esse M Evbuomwan1,2,3, Melissa Shenep4
1Department of Pathology and Immunology, Division of Laboratory and Genomic Medicine, Washington University School of Medicine, St. Louis, Missouri, USA.
ASM case reports
|November 17, 2025
概括
准确识别Bordetella物种至关重要. 本案例报告强调了由于遗传标不同而导致的咳核酸放大试验中的潜在交叉反应性.
科学领域:
- 医学微生物学 医学微生物学
- 传染性疾病 传染性疾病
- 分子诊断学 分子诊断
背景情况:
- 准确识别临床相关的波尔代特拉菌种,如B. pertussis和B. parapertussis,对于患者的治疗和控制传播的公共卫生措施至关重要.
- 核酸放大试验 (NAAT) 被广泛用于识别和区分这些苛刻的生物体,测试性能取决于所选的核酸标.
- 在商用NAAT平台中分子标的变化可以影响灵敏度和特异性.
研究的目的:
- 报告在骨髓移植后免疫力低下的儿童中发生波尔代氏菌感染病例.
- 为了调查不同NAAT平台和临床隔离物之间的Bordetella pertussis检测差异.
- 突出不同基因标和分子百日咳诊断中的潜在交叉反应性的影响.
主要方法:
- 一份病例报告,详细说明儿童的临床表现和诊断工作.
- 使用的BioFire呼吸系统面板2.1和DiaSorin分子Simplexa Bordetella直接用于NAAT.
- 雇佣MALDI-TOFMS和全基因组测序,以最终识别Bordetella分离物.
主要成果:
- 最初的BioFire RP2.1检测到B. pertussis DNA,但随后的培养发现了B. bronchiseptica.
- 在BioFire RP2.1上,多个鼻样本对B. pertussis呈阳性,但在DiaSorin Simplexa Bordetella Direct上呈阴性.
- 全基因组测序证实了B. bronchiseptica分离物中B. pertussis病毒性基因标 (ptxP) 的存在,解释了观察到的交叉反应性.
结论:
- 这一案例凸显了分子百日咳诊断的潜在陷,原因是NAAT目标和交叉反应性不同.
- 了解每个NAAT平台的特定遗传标对于准确解释结果至关重要,特别是在怀疑假阳性时.
- 强调将分子数据与微生物学和临床发现整合起来,以进行全面的诊断的重要性.
关键词:
博尔德特拉拉 (Bordetella) 是一个边境小镇.支气管感染是什么意思多重复合的NAAT和NAAT可以使用.pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis pertussis呼吸系统的病原体相关概念视频
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