Indications for worldwide increased norovirus activity associated with emergence of a new variant of genotype II.4, late 2012

J van Beek; K Ambert-Balay; N Botteldoorn; J S Eden; J Fonager; J Hewitt; N Iritani; A Kroneman; H Vennema; J Vinjé; P A White; M Koopmans; Collective on behalf of NoroNet

doi:10.2807/ese.18.01.20345-en

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Indications for worldwide increased norovirus activity associated with emergence of a new variant of genotype II.4, late 2012
J van Beek¹ , K Ambert-Balay² , N Botteldoorn³ , J S Eden⁴ , J Fonager⁵ , J Hewitt⁶ , N Iritani⁷ , A Kroneman¹ , H Vennema¹ , J Vinjé⁸ , P A White⁴ , M Koopmans¹ , Collective on behalf of NoroNet⁹
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Affiliations: ¹ National Institute for Public Health and the Environment, Bilthoven, The Netherlands ² National Reference Centre for Enteric Viruses, Dijon, France ³ Scientific Institute of Public Health, Brussels, Belgium ⁴ University of New South Wales, Sydney, Australia ⁵ Statens Serum Institut, Copenhagen, Denmark ⁶ Institute of Environmental Science and Research, Porirua, New Zealand ⁷ Osaka City Institute of Public Health and Environmental Sciences, Osaka, Japan ⁸ Centers for Disease Control and Prevention, Atlanta, GA, United States ⁹ http://www.noronet.nl

Correspondence:
J van Beek
janko.van.beek rivm.nl
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Citation style for this article: van Beek J, Ambert-Balay K, Botteldoorn N, Eden J S, Fonager J, Hewitt J, Iritani N, Kroneman A, Vennema H, Vinjé J, White P A, Koopmans M, on behalf of NoroNet Collective. Indications for worldwide increased norovirus activity associated with emergence of a new variant of genotype II.4, late 2012. Euro Surveill. 2013;18(1):pii=20345. https://doi.org/10.2807/ese.18.01.20345-en Received: 18 Dec 2012

Abstract

Globally, surveillance systems showed an increase in norovirus activity in late 2012. Molecular data shared through the NoroNet network suggest that this increase is related to the emergence of a new norovirus genotype II.4 variant, termed Sydney 2012. Healthcare institutions are advised to be prepared for a severe norovirus season.