在巴基斯坦PCV10前后时代的肺炎球菌分离物的菌株特征
Nida Javaid1,2, Stephanie W Lo2,3, Muhammad Imran Nisar4
1Department of Life Sciences, School of Science and Engineering, Lahore University of Management Science, Lahore, Pakistan.
Microbial genomics
|January 25, 2024
概括
这项研究分析了巴基斯坦在PCV10疫苗引入之前和之后的Streptococcus pneumoniae菌株. 结果显示高多样性和有限的PCV10覆盖率,表明需要更广泛的价值疫苗来对抗肺炎球菌病.
科学领域:
- 微生物学和免疫学
- 疫苗学 疫苗学 疫苗学
- 基因组学就是基因组学.
背景情况:
- 巴基斯坦面临高肺炎球菌死亡负担,需要有效的预防策略.
- 2012年引入的肺炎球菌联合疫苗10 (PCV10) 旨在减少肺炎球菌疾病,但其在人口层面对Streptococcus pneumoniae动态的影响尚不清楚.
研究的目的:
- 在巴基斯坦鉴定了Streptococcus pneumoniae分离体的遗传多样性,血清型分布和抗生素耐药性模式.
- 评估PCV10疫苗在疫苗接种前后时期对肺炎球菌种群动态的影响.
- 评估不同肺炎球菌联合疫苗配方的潜在覆盖率.
主要方法:
- 在2002年至2020年期间收集的190个Streptococcus pneumoniae分离物的全基因组测序.
- 基于血清型分布,全球肺炎球菌序列集群 (GPSC) 血统和抗生素耐药性概况的分离物分析.
- 对PCV10引入前后数据进行比较,以评估疫苗的影响.
主要成果:
- 观察到肺炎球菌的血清型 (54个已确定) 和遗传系 (67个GPSC) 的高度多样性.
- 发现了显著的抗生素耐药性,特别是针对青素,co-trimoxazole和四环素/多西环素.
- 在5岁以下的儿童中,PCV10显示出鼻运输 (21.6%) 和致病隔离物 (38.1%) 的有限覆盖率,而PCV13和PCV24/25显示出更高的潜在覆盖率.
结论:
- 该研究强调了巴基斯坦肺炎球菌的大量多样性,表明单独PCV10的有效性有限.
- 引起疾病的隔离物体与运输隔离物体相比,表现出更高的多药耐药率.
- 未来的疫苗策略应考虑高价值疫苗 (如PCV13,PCV24/25) 和持续监测,以解决各种血清型和耐药性模式.
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