从呼吸道和非呼吸道来源前景测序的Mycobacterium结核病的基因组特征
Xiaomei Zhang1,2,3, Connie Lam2,3, Eby Sim2,3
1Centre for Research Excellence in Tuberculosis (TB-CRE), Centenary Institute, Sydney, NSW, Australia.
iScience
|July 26, 2024
概括
老年人更有可能从呼吸道源中分离出Mycobacterium结核病 (TB),这会影响结核病控制策略. 这项研究分析了澳大利亚结核病菌株的人口和基因组数据.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 流行病学 流行病学
背景情况:
- 了解不同来源的Mycobacterium tuberculosis (M. tuberculosis) 菌株特征对于有效的临床护理和控制至关重要.
- 呼吸道和非呼吸道M.结核病分离物之间的人口和基因组差异没有得到很好的描述.
研究的目的:
- 为了调查来自澳大利亚新南威尔士州的呼吸道和非呼吸道来源的M.结核菌株的人口和基因组区别.
- 为结核病 (TB) 的临床管理和公共卫生干预提供信息.
主要方法:
- 对2017年1月至2021年12月的M.结核病分离物的人口统计数据和全基因组测序的分析.
- 后勤回归模型被用来识别患者特征和隔离源之间的关联.
- 基因组数据的比较,包括单核酸多态性 (SNP) 差异,用于来自双源的分离物.
主要成果:
- 在1831种M.结核菌培养中,64.7%是呼吸,32.1%是非呼吸,2.2%来自两种.
- 女性患者的非呼吸道隔离率更高 (p=0.03),而老年人 (≥65岁) 的呼吸道隔离率更高 (p<0.0001).
- 血统2菌株在呼吸道隔离物中更常见 (p=0.01);43.6%的双源病例具有1-10个SNP差异.
结论:
- 老年人在呼吸道M.结核病感染中占有不成比例的比例,这是控制结核病的关键考虑因素.
- 人口因素影响了M.结核病孤立的来源,这表明有针对性的监测和预防工作.
- 基因组分析揭示了潜在的传播途径和与结核病流行病学相关的菌株演变.
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