接种了15B/15C血清型切换肺炎球菌脑膜炎的婴儿
Richard Kevorkian1, Milene T Williams2, Cory M Mcfadden3
1Infectious Disease Lab, Landstuhl Regional Medical Center, Landstuhl, DEU.
Cureus
|September 22, 2025
概括
一个致命的肺炎球菌脑膜炎病例发生在一个完全接种疫苗的儿童身上,这种病例是由PCV13不涵盖的新兴血清型引起的. PCV20可能会提供对侵入性肺炎球菌病的更广泛的保护.
科学领域:
- 儿科 儿科 儿科
- 传染性疾病 传染性疾病
- 微生物学 微生物学
背景情况:
- 肺炎菌 (S. pneumoniae) 是全球儿童肺炎和脑膜炎的主要原因.
- 肺炎球菌结合疫苗 (PCV) 已经减少了疾病负担,但新出现的血清型仍然存在挑战.
- 侵入性肺炎球菌病 (IPD) 继续影响幼儿,尽管疫苗接种工作.
研究的目的:
- 报告一个完全接种疫苗的儿童肺炎球菌脑膜炎致命病例.
- 突出目前PCV13在覆盖新出现的S. pneumoniae血清型方面的局限性.
- 探索像PCV20这样的新疫苗的潜力,以增强保护.
主要方法:
- 一个两岁的男性患者的病例报告.
- 对脑脊液 (CSF) 和血液进行S. pneumoniae的分析.
- 细菌分离物的基因组测序.
- 对疫苗有效性和血清型覆盖率的审查.
主要成果:
- 接种PCV13疫苗的患者患上了致命的脑膜炎.
- 感染涉及S. pneumoniae血清型15B (CSF) 和15C (血液).
- 基因组分析表明,隔离物之间存在囊切换突变.
- PCV13缺乏15B和15C血清型的覆盖范围,而PCV20包括15B.
结论:
- 由于PCV13的局限性,需要探索更广泛的血清型覆盖疫苗.
- PCV20显示了增强免疫力或对新出现的血清型进行初级疫苗接种的前景.
- 适应性疫苗接种策略和持续监测对于对抗儿童中S. pneumoniae威胁至关重要.
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