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从肺外结核病的临床标本中分离出来的Mycobacterium结核病基因型
H Mollalign1, D Beyene2, S Moga3
1Ethiopian Public Health Institute, Infectious Diseases Research Directorate, Addis Ababa, Ethiopia;, Addis Ababa University, Department of Microbial Sciences and Genetics, Addis Ababa, Ethiopia.
埃塞俄比亚的肺外结核 (EPTB) 在Mycobacterium结核 (MTB) 基因型中显示出高度的遗传多样性,传染率低. 了解这些EPTB基因型有助于针对性干预.
科学领域:
- 遗传学 遗传学 是一个
- 流行病学 流行病学
- 微生物学 微生物学
背景情况:
- 埃塞俄比亚面临着超肺结核病 (EPTB) 的高负担.
- 了解EPTB的遗传组成和传播模式对于有效的控制策略至关重要.
研究的目的:
- 调查埃塞俄比亚EPTB病例中Mycobacterium结核病 (MTB) (亚系) 和传播集群的流行病学.
- 确定与药物耐药性风险增加相关的特定基因型.
主要方法:
- 一项采用微生物学证实EPTB分离物的全基因组测序的横截面研究.
- 使用MTBSeq管道进行生物信息分析,以表征MTB基因型和子系.
主要成果:
- 主要的MTB物种是4系 (欧美,63.8%) 和3系 (东非印度,31.9%).
- 观察到高度的遗传变异性,Clade1和Haarlem分支是4系中最常见的子系.
- 发现了较低的聚类率 (12.5%) 和最近的传播指数 (6.9%),表明了多样化的传播事件.
- 增加对利芬素耐药性的风险与4.2.2系的基因型有关.
- 在城市环境中的EPTB患者中发现了Mycobacterium bovis.
结论:
- 埃塞俄比亚的EPTB的特点是显著的基因型多样性和低传播集群.
- 特定的MTB基因型,如4.2.2系,与更高的耐药性风险有关.
- 城市EPTB病例中M. bovis的存在需要进一步调查.
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