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. 2024 May;29(20):2400242.
doi: 10.2807/1560-7917.ES.2024.29.20.2400242.

Increase in invasive group A streptococcal infections (iGAS) in children and older adults, Norway, 2022 to 2024

Beatriz Valcarcel Salamanca  1   2 , Pascale Renée Cyr  3 , Yngvild Emblem Bentdal  1 , Sara Viksmoen Watle  1 , Astrid Louise Wester  4 , Åse Marie Wikman Strand  3 , Håkon Bøås  1
Affiliations

Increase in invasive group A streptococcal infections (iGAS) in children and older adults, Norway, 2022 to 2024

Beatriz Valcarcel Salamanca et al. Euro Surveill. 2024 May.

Abstract

At the end of 2022 and most notably during the first half of 2023, the number of invasive group A streptococcus (iGAS) notifications increased in Norway, largely affecting children younger than 10 years, as observed in several other countries. Following this atypical season, a new surge in the number of iGAS notifications began in December 2023 and peaked between January and February 2024, now particularly affecting both children younger than 10 years and older adults (70 years and above).

Keywords: Group A Streptococcus; Streptococcus pyogenes; iGAS; invasive; outbreak.

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Conflict of interest statement

Conflict of interest: The authors declare that they have no known competing financial interests or personal relationships that could have influenced the work reported in this paper.

Figures

Figure 1
Figure 1
Monthly incidence of invasive group A streptococcal infection for all ages, Norway, January 1993– February 2024 (n = 6,219)
Figure 2
Figure 2
Expected and observed monthly invasive group A streptococcus notification rates per 100,000 population by age group and study periods, Norway, March 2010–February 2024 (n = 3,011)
See this image and copyright information in PMC

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