- Small, non-enveloped, single-stranded positive-sense RNA virus.
- Noroviruses are 1 of 5 genera in the Caliciviridae family.
- Sapoviruses are another genus in the family that also cause acute gastroenteritis.
- Noroviruses are grouped into genogroups, numbering six currently known (I, II, and IV cause human infections), further divided into genetic clusters.
- Genogroup II, genotype 4 (II.4) is most commonly associated with outbreaks and severe disease.
- Genogroup I generally causes less severe disease and a lower attack rate partly because of an association between ABO blood type and infection.
- Total 25 genotypes known among GI, GII and GIV.
- Previously known as "Norwalk-like viruses."
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Last updated: September 16, 2019
Hoffmann, Christopher J. "Norovirus." Johns Hopkins ABX Guide, The Johns Hopkins University, 2019. Pediatrics Central, peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540392/all/Norovirus.
Hoffmann CJ. Norovirus. Johns Hopkins ABX Guide. The Johns Hopkins University; 2019. https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540392/all/Norovirus. Accessed June 3, 2023.
Hoffmann, C. J. (2019). Norovirus. In Johns Hopkins ABX Guide. The Johns Hopkins University. https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540392/all/Norovirus
Hoffmann CJ. Norovirus [Internet]. In: Johns Hopkins ABX Guide. The Johns Hopkins University; 2019. [cited 2023 June 03]. Available from: https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540392/all/Norovirus.
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TY - ELEC T1 - Norovirus ID - 540392 A1 - Hoffmann,Christopher,M.D., M.P.H. Y1 - 2019/09/16/ BT - Johns Hopkins ABX Guide UR - https://peds.unboundmedicine.com/pedscentral/view/Johns_Hopkins_ABX_Guide/540392/all/Norovirus PB - The Johns Hopkins University DB - Pediatrics Central DP - Unbound Medicine ER -