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March 1, 2026Journal of InfectionOpen Access

Pneumococcal serotype epidemiology and resistance after PCV13 replacement with PCV10, Sweden

Linda Yamba Yamba Fabian Uddén Silvana Dalence Anouschka de Bruijn Wiebke Köster Jonas Ahl Kristian Riesbeck

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Key Points

The research aims to assess how switching from PCV13 to PCV10 affects serotype distribution in Streptococcus pneumoniae.
Examined respiratory tract S. pneumoniae isolates from 2020 to 2023 (n=1,615)
Serotyping and antimicrobial susceptibility testing conducted
Data compared with invasive pneumococcal disease isolates (n=397) and previous years' data (2016-2018)
Increased prevalence of serotypes 3 (13%) and 19A (11%) post-PCV10 reintroduction (p<0.001)
IPD showed an increase in serotype 19A from 5.6% to 19% (p<0.001)
Low PCV10 vaccination coverage at 4.1% but increased with higher valency vaccines
Resistance observed mainly against trimethoprim/sulfamethoxazole (13%) and erythromycin (9.3%)

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Implication

Evaluation demonstrates increased serotypes in pneumococcal disease post-vaccine change, highlighting surveillance needs.

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Cite This Study

Yamba et al. (2026) studied this question.

synapsesocial.com/papers/69b64d48b42794e3e660e13d https://doi.org/10.1016/j.jinf.2026.106723

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Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1Invasive pneumococcal disease in persons with predisposing factors is dominated by non-vaccine serotypes in Southwest SwedenRetrospective Study · 2021 · 14 citations
2Comparative Analysis of Pneumococcal Serotypes over a 10-Year Period (2014–2024) in the Comunidad Valenciana Region and Their Relationship with PCV13, PCV20 and PCV212025
3Effect of Childhood Pneumococcal Conjugate Vaccination on Invasive Disease Serotypes in Serbia2024 · 12 citations
4Impact of sequential pediatric pneumococcal conjugate vaccination (PCV10/PCV13/PCV10) on serotype distribution and antimicrobial resistance in invasive and non-invasive Streptococcus pneumoniae isolates in Serbian childrenOriginal Research · 2026 · 1 citations
5Comparative Analysis of Pneumococcal Serotypes for 10 Years (2014–2024) in the Comunidad Valenciana Region, Spain, and How They Are Correlated with PCV13, PCV20, and PCV212025 · 2 citations

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Streptococcus pneumoniae carriage, serotypes, genotypes, and antimicrobial resistance trends among children in Portugal, after introduction of PCV13 in National Immunization Program: A cross-sectional study2024
Serotype distribution of <i>Streptococcus pneumoniae</i> in children with invasive diseases in Türkiye, 2019–2025: An update in the 10th to 15th years of routine pneumococcal conjugate vaccination2026
Changes in the Streptococcus pneumoniae population responsible for invasive disease of young children after the implementation of conjugated vaccines in the National Immunization Program in Poland2025

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