The burden of norovirus disease in children: a multi-country study in Chile, Brazil, Thailand and the Philippines

• Autor(a) principal: Safadi, Marco Aurelio
• Data de Publicação: 2021
• Outros Autores: Riera-Montes, Margarita, Bravo, Lulu, Tangsathapornpong, Auchara, Lagos, Rasanna, Thisyakorn, Usa, Linhares, Alexandre da Costa, Capeding, Rose, Prommalikit, Olarn, Verstraeten, Thomas, O'Ryan, Miguel
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Digital do Instituto Evandro Chagas (Patuá)
• Texto Completo: https://patua.iec.gov.br/handle/iec/4338
• topic: Norovirus / patogenicidade; Infecções por Caliciviridae / virologia; Gastroenterite / virologia; Hospitais Pediátricos; Brasil (BR); Chile (CHL); Filipinas (PHI); Tailândia (THA)

Background: Noroviruses (NoVs) cause acute gastroenteritis (AGE) worldwide, affecting children in particular. We aimed to estimate the burden of disease due to NoV among children aged <6 years in Brazil, Chile, Philippines and Thailand. Methods: This was a prospective, hospital-based, observational study. Children were recruited over one year between 2014 and 2017. Four cohorts were analysed: community-acquired AGE outpatients and inpatients, nosocomial AGE inpatients, and asymptomatic outpatients. We collected demographic and clinical data, and a stool sample that was tested for NoV. Positive samples were tested for Rotavirus (RV) and NoV-genotyped. Disease severity was assessed by the Vesikari and modified Vesikari scores. Prevalence and incidence of NoV-AGE were estimated by cohort and country. Results: 1637 participants yielded valid laboratory results. The proportion of NoV-positive cases was 23.8% (95% CI 20.8-27.2) in the outpatient cohort, 17.9% (15.0-21.3) in the hospital cohort, 21.4% (12.7-33.8) in the nosocomial cohort and 9.6% (6.9-13.2) in the asymptomatic cohort. Genotype GII.4 was predominant (58%). Less than 4% samples had RV coinfection. In general, NoV-positive subjects had more severe presentations than NoV-negative subjects. Conclusions: NoV caused AGE with substantial burden throughout the studied settings, with higher relative frequency in Brazil where RV vaccination coverage is high.