在日本神户的Mycobacterium肺结核菌株的传染动力学变异性,使用基于人口的全基因组测序分析确定
Tomotada Iwamoto1, Kentaro Arikawa2, Yoshiro Murase3
1Kobe Institute of Health, Kobe City, Hyogo, Japan; Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano City, Osaka, Japan.
概括
在日本,结核病的传播因 Mycobacterium tuberculosis (Mtb) 亚系而异. 老年患者的传播率较低,激活率更高,而年轻和外国出生的患者与更易传播的Mtb L2菌株有关.
科学领域:
- 基因组学就是基因组学.
- 流行病学 流行病学
- 传染性疾病 传染性疾病
背景情况:
- 结核病 (TB) 在日本很普遍,特别是在老年人中.
- 结核菌菌菌 (Mtb) 血统2 (L2) 是主要的菌株.
- 在外国出生的个人中增加结核病例增加了复杂性.
研究的目的:
- 在日本老龄化人口中调查Mtb L2亚系的传播动态.
- 在老年人和非老年结核病患者之间区分传播模式.
- 分析外国出生的患者对结核病菌株多样性的影响.
主要方法:
- 来自日本神户的550MTB菌株的全基因组测序.
- 双对单核酸多态 (SNP) 距离聚类.
- 终端分支长度 (TBL) 分布分析.
主要成果:
- 老年患者 (≥70岁) 的基因组聚类率较低 (≤5个SNP) 和较长的TBL,这表明重新激活是关键.
- Mtb亚系L2.2.A与老年患者相关,具有低传播率和高活性化潜力.
- 亚系L2.2.现代与较年轻/外国出生的高传染性患者相关;其他亚系表明最近的特有流行.
结论:
- 远程感染的重新激活推动了日本老年人群的结核病发病率.
- 不同的Mtb L2亚系表现出不同的传播动态和宿主关联.
- 出生在国外的人口为日本的Mtb菌株多样性作出了贡献.
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