乳児の肺炎球菌ワクチンの血清型運搬の形成における母親のTdapと乳児の肺炎球菌ワクチン接種の相互作用
Eline Van den Bosch1, Helene Vermeulen2, Esra Ekinci1
1Centre for the Evaluation of Vaccination, University of Antwerp, Wilrijk, Belgium.
The Journal of infectious diseases
|August 30, 2025
まとめ
妊娠中の母親によるチタノス,ジフテリア,非細胞性咳 (Tdap) ワクチン接種は,乳児における肺炎球菌ワクチン関連血清型の感染率の上昇と関連していた. この発見の臨床的意義を理解するためにさらなる研究が必要である.
科学分野:
- 免疫学
- ワクチン学
- 子供 の 感染症
背景:
- 胎児の肺炎球菌結合ワクチン (PCV) に対する免疫反応に影響を与える可能性があります.
- 肺炎球菌ワクチンの血清型の乳児の鼻経輸送に対する母親のTdapワクチン接種の影響は十分に理解されていません.
研究 の 目的:
- 妊娠中のTdapワクチン接種と乳児における肺炎球菌ワクチンの血清型伝達との関連を調査する.
- 異なる肺炎球菌結合ワクチンのスケジュールが血清型の運搬に与える影響を分析する.
主な方法:
- ベルギーの6~30ヶ月の乳児から3,298個の鼻のスランプを採取した (2018~2022年).
- 培養基 (Quellung反応) と分子方法 (qPCR) を用いて,Streptococcus pneumoniaeの運搬と血清決定の評価
- 母親のTdapワクチン接種と乳児の肺炎球菌の血清型伝達との関連を評価するために使用されたロジスティック一般化推定方程式モデル.
主要な成果:
- 妊娠中にTdapワクチンを接種した母親から生まれた乳児は,PCV13に関連する血清型の運搬が著しく高かった.
- PCV10またはPCV10/PCV13の混合配列を投与された乳児は,PCV13のみを投与された乳児と比較して,PCV13に関連した血清型の発現が増加した.
- Tdapワクチンを接種した母親の乳児では,セロタイプ6Cの有意な増加が観察されましたが,非ワクチンのセロタイプの有意な差は認められませんでした.
結論:
- 妊婦のTdapワクチン接種は,乳児の肺炎球菌ワクチンの血清型の増加と関連しています.
- この増加した運搬の臨床的影響については,さらなる調査が必要である.
- 将来の研究では,母体と乳児のワクチン接種戦略を導き出すために,ワクチンの血清型運搬と抗体レベルを相関させるべきである.
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