Third Streptococcus pneumoniae disease outbreak involving serotype 4–ST801 in a shipyard, Finland, May to June 2025 - UTU Research Portal

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Third Streptococcus pneumoniae disease outbreak involving serotype 4–ST801 in a shipyard, Finland, May to June 2025

Authors: Manca, Maria Francesca; Silvola, Jaakko; Czarnecki, Jakub; Sequeira Neto, Joana; Kanerva, Mari; Kaukavuori, Heikki; González Pérez, Ana Cristina; Lindström, Irmeli; Frilander, Heikki; Fomichev, Mikhail; Marttila, Harri; Ratia, Riitta; Lakoma, Leif; Siira, Lotta

Publisher: European Centre for Disease Control and Prevention (ECDC)

Publication year: 2025

Journal: Eurosurveillance

Volume: 30

Issue: 41

ISSN: 1025-496X

eISSN: 1560-7917

DOI: https://doi.org/10.2807/1560-7917.ES.2025.30.41.2500758

Publication's open availability at the time of reporting: Open Access

Publication channel's open availability : Open Access publication channel

Web address : https://doi.org/10.2807/1560-7917.es.2025.30.41.2500758

Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/504735714

Abstract

Finland experienced three invasive pneumococcal disease (IPD) outbreaks among shipyard workers at the same shipyard, in 2019, 2023 and 2025. During the latest outbreak (30 April-6 June 2025), 13 cases were reported, with six confirmed. All five isolates from blood culture-positive cases were serotype 4 - sequence type 801. These were nearly indistinguishable from three isolates from the 2019 outbreak, nine Finnish IPD surveillance isolates and isolates of a 2019 Norwegian shipyard outbreak. We found an association with welding.

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Funding information in the publication:
This study was conducted on institutional funding. MFM, JC, and JSN are fellows of the ECDC Fellowship Programme, supported financially by the European Centre for Disease Prevention and Control (ECDC). The views and opinions expressed herein do not state or reflect those of ECDC. ECDC is not responsible for the data and information collation and analysis and cannot be held liable for conclusions or opinions drawn.