Gastroenteritis Caused by Norovirus GGII.4, the Netherlands, 1994–2005

Abstract

From 1994 through 2005, gastroenteritis outbreaks caused by norovirus generally increased in the Netherlands, with 3 epidemic seasons associated with new GGII.4 strains. Increased percentages of GGII.4 strains during these epidemics, followed by a sharp decrease in their absolute and relative numbers, suggest development of immunity.

Keywords

• Norovirus
• molecular epidemiology
• caliciviruses
• gastroenteritis
• outbreak
• dispatch