International links between Streptococcus pneumoniae vaccine serotype 4 sequence type (ST) 801 in Northern European shipyard outbreaks of invasive pneumococcal disease

The Global Pneumococcal Sequencing Consortium, R. A. Gladstone, L. Siira, O. B. Brynildsrud, D. F. Vestrheim, P. Turner, S. C. Clarke, S. Srifuengfung, R. Ford, D. Lehmann, E. Egorova, E. Voropaeva, G. Haraldsson, K. G. Kristinsson, L. McGee, R. F. Breiman, S. D. Bentley, C. L. Sheppard, N. K. Fry, J. CoranderM. Toropainen, A. Steens

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Abstract

Background: Pneumococcal disease outbreaks of vaccine preventable serotype 4 sequence type (ST)801 in shipyards have been reported in several countries. We aimed to use genomics to establish any international links between them. 

Methods: Sequence data from ST801-related outbreak isolates from Norway (n = 17), Finland (n = 11) and Northern Ireland (n = 2) were combined with invasive pneumococcal disease surveillance from the respective countries, and ST801-related genomes from an international collection (n = 41 of > 40,000), totalling 106 genomes. Raw data were mapped and recombination excluded before phylogenetic dating. 

Results: Outbreak isolates were relatively diverse, with up to 100 SNPs (single nucleotide polymorphisms) and a common ancestor estimated around the year 2000. However, 19 Norwegian and Finnish isolates were nearly indistinguishable (0–2 SNPs) with the common ancestor dated around 2017. 

Conclusion: The total diversity of ST801 within the outbreaks could not be explained by recent transmission alone, suggesting that harsh environmental and associated living conditions reported in the shipyards may facilitate invasion of colonising pneumococci. However, near identical strains in the Norwegian and Finnish outbreaks does suggest that transmission between international shipyards also contributed to those outbreaks. This indicates the need for improved preventative measures in this working population including pneumococcal vaccination.

Original languageEnglish
Pages (from-to)1054-1060
Number of pages7
JournalVaccine
Volume40
Issue number7
Early online date5 Jan 2022
DOIs
Publication statusPublished - 11 Feb 2022

Bibliographical note

Funding Information: The authors declare the following financial interests/personal relationships which may be considered as potential competing
interests: [R.A.G received a PhD stipend from Pfizer 2009–2011. L.S is a co-investigator in an unrelated study, for which THL has received research funding from GlaxoSmithKline Vaccines. S.C.C: acts as principal investigator on studies conducted on behalf of University Hospital Southampton NHS Foundation Trust/University of Southampton that are sponsored by vaccine manufacturers but
receives no personal payments from them. S.C.C. has participated in advisory boards for vaccine manufacturers but receives no personal payments for this work. S.C.C. has received financial assistance from vaccine manufacturers to attend conferences. All grants and honoraria are paid into accounts within the respective NHS Trusts or Universities, or to independent charities. N.K.F, C.L.S
The Immunisation and Countermeasures Division, Public Health England - National Infection Service, London, UK provides vaccine manufacturers with post-marketing surveillance reports, which the Marketing Authorization Holders are required to submit to the UK Licensing authority in compliance with their Risk Management Strategy. A cost recovery charge is made for these reports. N.K.F and C.S. conduct contract research funded by vaccine manufacturers (including GlaxoSmithKline and Pfizer) on behalf of Public Health England. No personal remuneration is received. M.T reports grants from GlaxoSmithKline and Pfizer to the Finnish Institute for Health and Welfare for unrelated research projects in which she is a co-investigator. All remaining authors report no conflicts of
interest.]

Sequencing of outbreak and contemporary IPD surveillance isolates were funded internally in the respective public health institutes. The Global Pneumococcal Sequencing project was funded by Wellcome Trust, grant number 206194/Z/17/Z, and by the Bill and Melinda Gates Foundation, Investment ID INV-003570. J.C. was funded by the European Research Council grant no. 742158.PT is funded by the Wellcome Trust (Thailand-Laos AAP core award, grant no. 220211).

Publisher Copyright: © 2021 The Author(s). Published by Elsevier Ltd.

Citation: Gladstone, R. A., et al. "International links between Streptococcus pneumoniae vaccine serotype 4 sequence type (ST) 801 in Northern European shipyard outbreaks of invasive pneumococcal disease." Vaccine (2022).

DOI: https://doi.org/10.1016/j.vaccine.2021.10.046

Keywords

  • Molecular epidemiology
  • Outbreak
  • PCVs
  • PPV23
  • Pneumococcal
  • ST801
  • Serotype 4
  • Streptococcus pneumoniae
  • Whole genome sequencing
  • RISK
  • WELDERS
  • EPIDEMIOLOGY

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