Increase in invasive group A streptococcal infections and emergence of novel, rapidly expanding sub-lineage of the virulent Streptococcus pyogenes M1 clone, Denmark, 2023

Thor Bech Johannesen, Charlotte Munkstrup,Sofie Marie Edslev,Sharmin Baig, Stine Nielsen,Tjede Funk, Dennis Karsten Kristensen, Lars Hervig Jacobsen, Signe Fischer Ravn, Niels Bindslev,Sophie Gubbels,Marianne Voldstedlund,Pikka Jokelainen,Soren Hallstrom, Astrid Rasmussen,Karl Gustaf Kristinsson,David Fuglsang-Damgaard,Ram B. Dessau, Agnieszka Barbara Olsen, Christian Salgaard Jensen, Annette Skovby,Svend Ellermann-Eriksen,Thoger Gorm Jensen,Esad Dzajic,Claus Ostergaard, Steen Lomborg Andersen,Steen Hoffmann,Peter HenrikAndersen,Marc Stegger

Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin（2023）

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摘要

A highly virulent sub-lineage of the Streptococcus pyogenes M1 clone has been rapidly expanding throughout Denmark since late 2022 and now accounts for 30% of the new invasive group A streptococcal infections. We aimed to investigate whether a shift in variant composition can account for the high incidence rates observed over winter 2022/23, or if these are better explained by the impact of COVID-19-related restrictions on population immunity and carriage of group A Streptococcus.

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关键词

Denmark,Iceland,M1,M1DK,Streptococcus pyogenes,bacterial genomics,group A Streptococcus,virulence

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