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. 2024 Sep;29(39):2400625.
doi: 10.2807/1560-7917.ES.2024.29.39.2400625.

Increased circulation of GII.17 noroviruses, six European countries and the United States, 2023 to 2024

Preeti Chhabra  1 , Shan Wong  2 , Sandra Niendorf  3 , Ingeborg Lederer  4 , Harry Vennema  5 , Mirko Faber  6 , Athinna Nisavanh  7 , Sonja Jacobsen  3 , Rachel Williams  8 , Aoife Colgan  9 , Zoe Yandle  10 , Patricia Garvey  9 , Haider Al-Hello  11 , Katia Ambert-Balay  12 , Leslie Barclay  1 , Miranda de Graaf  13 , Cristina Celma  2 , Judith Breuer  8 , Jan Vinjé  1 , Amy Douglas  14
Affiliations

Increased circulation of GII.17 noroviruses, six European countries and the United States, 2023 to 2024

Preeti Chhabra et al. Euro Surveill. 2024 Sep.

Abstract

We report an increase in GII.17 norovirus outbreaks and sporadic infections of acute gastroenteritis in Austria, Germany, France, Ireland, the Netherlands, England and the United States during the 2023/24 season. A decrease in GII.4 coincided with GII.17 prevalence increasing to between 17% and 64% of all GII detections. Overall, 84% of the GII.17 strains clustered closely with strains first reported in Romania in 2021 and two new sub-lineages were identified. Norovirus surveillance and molecular characterisation should be prioritised this winter.

Keywords: GII.17; GII.4; Norovirus; emergence; gastroenteritis.

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Conflict of interest statement

Conflict of interest: None declared.

Figures

Figure 1
Figure 1
Trends of GII norovirus samples or outbreaks typed as genotype GII.17 or GII.4 by season, four European countries and the United States, 2017–2024 (n = 10,782)
Figure 2
Figure 2
Percentage of GII norovirus outbreaks or samples typed as genotype GII.17 or GII.4 by season, four European countries and the United States, 2017–2024 (n = 6,873)
Figure 3
Figure 3
Phylogenetic analyses of GII.17 strains circulating in three European countries and the United States, 2021–2024 (n = 107)
See this image and copyright information in PMC

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