在南韩的PCV实施中,基因组分析和肺炎球菌种群动态,1997-2023年
Jeong-Ih Shin1,2, Sung-Yeon Cho3,4,5, Jiyon Chu1
1Department of Medical Sciences, Graduate School of The Catholic University of Korea, Seoul, Republic of Korea.
Microbial genomics
|July 17, 2025
概括
韩国的基因组监测显示,PCV13后出现的非疫苗血清型,如10A,与抗菌素耐药性增加一起. 这凸显了对PCV20等最新疫苗的需求,以对抗侵袭性肺炎球菌疾病.
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:
- 肺炎球菌合疫苗 (PCVs) 减少了侵入性肺炎球菌疾病 (IPDs),但血清型被非疫苗血清型 (NVTs) 替代仍然存在.
- 基因组监测对于了解肺炎球菌种群动态和指导公共卫生干预至关重要.
研究的目的:
- 分析来自韩国的肺炎球菌分离物 (1997-2023年) 以描述血清型分布,抗菌素耐药性和毒性因素.
- 评估PCV13对血清型替代的影响,并确定NVT 10A.等新出现的威胁.
主要方法:
- 236个 *Streptococcus pneumoniae* 隔离物的全基因组测序.
- 对血清型,抗微生物耐药性,毒性因子和全球肺炎球菌序列集群 (GPSC) 的分析.
- 评估囊切换事件和肺炎球菌血统,血清型和疾病侵入性之间的关系.
主要成果:
- 在PCV13后,NVTs,特别是23A,15B/15C和10A,占主导地位,10A与侵入性疾病和β-乳酸抗性有关.
- 观察到高抗微生物不敏感性对阿齐思罗素 (82.7%),四环素 (76.5%) 和co-trimoxazole (70.4%),PCV13.0后的比率增加.
- 与IPD相关的毒性因子*pspA*和*pfbA*;在非侵入性病例中,PI-1基因更频繁.
结论:
- 基因组监测对于监测肺炎球菌进化和为疫苗策略提供信息至关重要.
- NVT 10A的出现和抗菌素耐药性的增加需要更新的疫苗接种方法.
- 将血清型10A纳入PCV20是一个有希望的步骤,以减少全球IPD负担.
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