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Emergence of a novel GII.17 norovirus – End of the GII.4 era?

M de Graaf1, J van Beek, H Vennema

  • 1Erasmus MC, Department of Viroscience, Rotterdam, the Netherlands.

Euro Surveillance : Bulletin Europeen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin
|July 11, 2015
PubMed

Insights

A new norovirus strain, GII.17 Kawasaki 2014, emerged in 2014/15, causing outbreaks in Asia. Public health systems should monitor this novel norovirus (GII.17) for potential global spread.

Area of Science:

  • Virology
  • Epidemiology
  • Public Health

Background:

  • A novel norovirus strain, GII.17 Kawasaki 2014, emerged in the winter of 2014/15.
  • This strain became a major cause of gastroenteritis outbreaks in China and Japan.
  • GII.17 viruses have replaced the previously dominant GII.4 genotype Sydney 2012 in parts of Asia.

Purpose of the Study:

  • To provide an overview of available information on GII.17 norovirus.
  • To gain insight into the viral and host characteristics of this norovirus genotype.
  • To discuss the emergence of GII.17 norovirus in the context of norovirus epidemiology.

Main Methods:

  • Literature review and data synthesis on GII.17 norovirus emergence and characteristics.
  • Epidemiological analysis of norovirus outbreaks.
  • Comparative analysis of GII.17 and GII.4 norovirus strains.

Main Results:

  • The GII.17 Kawasaki 2014 strain emerged rapidly and caused significant outbreaks.
  • GII.17 viruses demonstrated the capacity to displace established norovirus strains in specific regions.
  • Limited detection of GII.17 on continents outside Asia suggests ongoing geographical shifts.

Conclusions:

  • The emergence of GII.17 Kawasaki 2014 highlights the dynamic nature of norovirus evolution.
  • Further surveillance is needed to determine if GII.17 will replace GII.4 Sydney 2012 globally.
  • Preparedness for potential increases in norovirus activity due to GII.17 is crucial for public health.

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