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  • Title: Viral gastrointestinal infections and norovirus genotypes in a paediatric UK hospital, 2014-2015.
    Author: Brown JR, Shah D, Breuer J.
    Journal: J Clin Virol; 2016 Nov; 84():1-6. PubMed ID: 27615516.
    Abstract:
    BACKGROUND: Diarrhoea in children is a common disease; understanding the incidence of causative viruses can aid infection control and vaccine development. OBJECTIVES: Describe the incidence and characteristics of gastroenteric viruses including norovirus genotypes in a paediatric hospital cohort. STUDY DESIGN: Norovirus, adenovirus, sapovirus, astrovirus, rotavirus qPCR and norovirus genotyping results for all stool specimens (n=4786; 1393 patients) at a UK paediatric tertiary referral hospital June 2014-July 2015. RESULTS AND DISCUSSION: 24% (329/1393) of patients were positive for a GI virus; the majority were positive for norovirus (44%, 144/329) or adenovirus (44%, 146/329). The overall incidence of rotavirus (2%) is reduced compared to pre-vaccination studies; however the incidence of other GI viruses has not increased. Norovirus infections had a significantly higher virus burden compared to other GI viruses (P ≤0.03); sapovirus infections had the lowest viral burden. The number of norovirus cases per month did not follow the typical winter seasonal trend of nationally reported outbreaks. The number of cases per month correlates with the number of hospital admissions (R=0.703, P=0.011); the number of admissions accounts for 50% of the variability in number of cases per month. The breadth of genotypes seen (48% non-GII.4), suggests a community source for many norovirus infections and has implications for vaccine development. All GI viruses caused chronic infections, with the majority (50-100%) in immunocompromised patients. Incidence or duration of infection in chronic norovirus infections did not differ between genotypes, suggesting host-mediated susceptibility.
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