Key result
Among 122 genotyped norovirus outbreaks in Norway from 2000 to 2005, 91.8% were caused by GII strains, with GII.4 becoming predominant after September 2002.
Observational (n=204)
GII.4 norovirus strains became predominant in Norway after September 2002, and the study identifies a suitable real-time RT-PCR assay for routine diagnostics.
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Alerts clinicians to historical GII.4 dominance in outbreaks; leaves open current strain surveillance needs and assay updates.
Vainio et al. (2006) conducted an observational in Norovirus gastroenteritis outbreaks (n=204). Molecular epidemiology and real-time RT-PCR assays was evaluated on Proportion of outbreaks caused by GII strains. Among 122 genotyped norovirus outbreaks in Norway from 2000 to 2005, 91.8% were caused by GII strains, with GII.4 becoming predominant after September 2002.
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