在16S微生物组分析过程中,从女性的子宫和子宫内膜样本中检测到避免诊断的Chlamydia trachomatis变体
Sangmi Jeong1, Tammy Tollison1, Hayden Brochu1
1North Carolina State University, Raleigh, NC, 27695, USA.
BMC infectious diseases
|March 13, 2025
概括
一项研究发现,在美国流通的Chllamydia trachomatis (CT) 突变病毒,可能导致假阴性结果. 需要进一步的研究,以改善疑似病例的CT测试.
科学领域:
- 微生物学 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:
- 在220名参与者的宫性阴道微生物组的16SrRNA分析显示,标准测定样本中的克拉米迪亚白虫 (CT) DNA呈阴性.
- 在对NG感染负面的样本中也检测到菌 (NG) DNA.
研究的目的:
- 在标准诊断试验结果不一致的样本中调查克拉米迪亚虫 (CT) 和尼塞利亚淋病 (NG) DNA 的存在和特征.
- 确定CT和NG测试中假阴性结果的潜在原因.
主要方法:
- 针对性PCR放大和测序克拉米迪亚23SrRNA的位置.
- 定量PCR (qPCR) 用于检测残留诊断样本中的炎球菌DNA.
- 来自TRAC队列的16SrRNA测序数据的分析.
主要成果:
- 不一致的样本中的克拉米迪亚DNA在23SrRNA位点中含有G1523A核酸多态,表明一种避开探针的CT突变.
- 这种特定的CT变种以前在欧洲国家被发现.
- 确认了菌DNA检测,其水平接近诊断试验的检测极限.
结论:
- 在其正式表征之前,一种避开探针的CT突变在美国东北部流传.
- 罕见的错误阴性CT测试结果可能归因于这些探针避开突变.
- 对于被怀疑感染这些菌株的个人,需要对使用替代探针的CT测试进行进一步调查.
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