B组的人口遗传学
Dorota Jamrozy1, Guduru Gopal Rao2,3, Theresa Feltwell4
1Parasites and Microbes Programme, Wellcome Sanger Institute, Hinxton, United Kingdom.
Frontiers in microbiology
|June 5, 2023
概括
针对B组链球菌 (GBS) 的孕产妇免疫可以减少新生儿感染. 人口遗传学揭示了疫苗的目标,但也突出了具有抗生素耐药性的高风险GBS血统,这给疫苗开发带来了挑战.
科学领域:
- 微生物学 微生物学
- 遗传学 是一个遗传学.
- 公共卫生 公共卫生
背景情况:
- 乙组链球菌 (GBS) 是新生儿感染的主要原因.
- 孕产妇免疫接种是预防GBS疾病的一个有希望的策略.
- 了解孕妇GBS人口结构对于疫苗开发至关重要.
研究的目的:
- 为了描述伦敦母亲怀孕中的GBS分离物种的种群结构.
- 为了确定流行的GBS血清型和与疫苗标相关的克隆复合体 (CCs).
- 调查抗菌素耐药性模式及其与GBS血统和母体种族的关联.
主要方法:
- 从母体运输中分离535个GBS的全基因组测序.
- 对人口结构,血清型和毒性/耐药性基因的分析.
- 对GBS特征,母亲的种族和抗菌素耐药性之间的关联进行统计分析.
主要成果:
- 五个主要的GBS系 (CC1,CC19,CC23,CC17,CC8/10) 包含95%的分离物.
- 血清型III,V,II和Ia是最常见的.
- 高频率的阿尔法家族蛋白质基因 (99%) 和宏 - 林科萨米德 - 链条蛋白B (MLSB) 耐药基因 (22%).
- 观察到母亲的种族和GBS血型/血统分布之间存在显著的关联.
- 检测到克拉里思罗米辛 (21%) 和克林达米辛 (13%) 的耐药性.
结论:
- 来自伦敦孕妇的GBS分离体显示了疫苗标的高患病率.
- 特定的血统 (CC1,CC19) 拥有血清型多样性和抗菌素耐药性,这带来了挑战.
- 这些高风险血统可能充当非疫苗菌株和耐药性决定因素的储存库.
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