对在墨西哥分布的耐药Mycobacterium结核病的基因组流行病学分析
Paulina M Mejía-Ponce1, Elsy J Ramos-González2, Axel A Ramos-García1
1Centro de Biotecnología FEMSA, Escuela de Ingeniería y Ciencias, Tecnológico de Monterrey, Nuevo León, México.
PloS one
|October 13, 2023
概括
墨西哥结核病 (TB) 的基因组监测显示,在Mycobacterium tuberculosis (Mtb) 菌株中,欧美血统 (L4) 占主导地位. 该研究突出了耐药性模式和遗传和表型耐药性标志物之间的差异.
科学领域:
- 基因组学就是基因组学.
- 微生物学 微生物学
- 流行病学 流行病学
背景情况:
- 基因组学显著推进了病原体监测,药物耐药性检测和结核病 (TB) 疾病控制.
- 在Mycobacterium tuberculosis (Mtb) 基因组数据库中,拉丁美洲的代表性显著有限,阻碍了对区域结核病流行病学的理解.
研究的目的:
- 来自墨西哥的Mtb临床菌株进行全基因组测序 (WGS) 分析.
- 调查墨西哥MTB种群中的本地适应和耐药性特征.
- 为扩大来自拉丁美洲的Mtb基因组数据作出贡献.
主要方法:
- 来自墨西哥17个州的85万亿个临床菌株的全基因组测序 (WGS).
- 遗传学分析以确定Mtb血统和亚系.
- 对一线抗生素进行表型耐药性测试.
主要成果:
- 欧美血统 (L4) 占数据集的94%,其中4.1.2.1 (哈勒姆) 和4.1.1.3 (X型) 亚系最为普遍.
- 在6个新地点确定了特有墨西哥亚系4.1.1.3.
- 在85个菌株中,有34个菌株表现出表型耐药性,基因型和表型之间存在显著的差异,包括缺乏正规耐药变异的对pyrazinamide单抗菌株.
结论:
- 这项研究为墨西哥的Mtb提供了关键的基因组洞察力,该地区由L4系及其子系主导.
- 观察到的耐药性模式和基因型-表型差异突显了全面基因组监测的必要性.
- 扩大拉丁美洲Mtb基因组数据库对于改善该地区的结核病流行病学理解和控制策略至关重要.
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