The emergence of new GGII.4 norovirus variants (2008 and Cairo) in France suggests they may become the next predominant strains causing gastroenteritis outbreaks.
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Emerging variants may signal shifting outbreak patterns; leaves open need for prospective surveillance before guiding diagnostics or vaccines.
Analysis of 316 outbreaks of gastroenteritis in France from September 2007 through March 2009 showed that genogroup II.4 (GGII.4) noroviruses were predominant and mostly belonged to the 2006b variant. However, the new GGII.4 variants, variant 2008 and the newly discovered Cairo variant from the Middle East, were also detected. The epidemiological survey suggests that these new variants might become the next predominant strains.
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Belliot et al. (2009) studied this question.
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