Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/23090
Title: The Impact of the Extreme Amazonian Flood Season on the Incidence of Viral Gastroenteritis Cases
Authors: Vieira, Carmen Baur
Corrêa, Adriana de Abreu
Jesus, Michele Silva de
Luz, Sérgio Luiz Bessa
Wyn-Jones, Peter
Kay, David
Rocha, Mônica Simões
Miagostovich, Marize Pereira
Affilliation: Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Virologia Comparada e Ambiental. Rio de Janeiro, RJ. Brasil.
Universidade Federal Fluminense. Instituto Biomédico. Departamento de Microbiologia e Parasitologia. Laboratório de Diagnose Virológica. Niterói, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Leônidas & Maria Deane. Laboratório de Ecologia das Doenças Infecciosas na Amazônia. Manaus, AM, Brasil.
Fundação Oswaldo Cruz. Instituto Leônidas & Maria Deane. Laboratório de Ecologia das Doenças Infecciosas na Amazônia. Manaus, AM, Brasil.
Aberystwyth University. Department of Geography and Earth Sciences. Aberystwyth, Ceredigion SY23 3DB, UK.
Aberystwyth University. Department of Geography and Earth Sciences. Aberystwyth, Ceredigion SY23 3DB, UK.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Virologia Comparada e Ambiental. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Virologia Comparada e Ambiental. Rio de Janeiro, RJ. Brasil.
Abstract: During the Amazonian flood season in 2012, the Negro River reached its highest level in 110 years, submerging residential and commercial areas which appeared associated with an elevation in the observed gastroenteritis cases in the city of Manaus. The aim of this study was to evaluate the microbiological water quality of the Negro River basin during this extreme flood to investigate this apparent association between the illness cases and the population exposed to the contaminated waters. Forty water samples were collected and analysed for classic and emerging enteric viruses. Human adenoviruses, group A rotaviruses and genogroup II noroviruses were detected in 100, 77.5 and 27.5% of the samples, respectively, in concentrations of 10(3)-10(6) GC/L. All samples were compliant with local bacteriological standards. HAdV2 and 41 and RVA G2, P[6], and P[8] were characterised. Astroviruses, sapoviruses, genogroup IV noroviruses, klasseviruses, bocaviruses and aichiviruses were not detected. Statistical analyses showed correlations between river stage level and reported gastroenteritis cases and, also, significant differences between virus concentrations during this extreme event when compared with normal dry seasons and previous flood seasons of the Negro River. These findings suggest an association between the extreme flood experienced and gastrointestinal cases in the affected areas providing circumstantial evidence of causality between the elevations in enteric viruses in surface waters and reported illness.
Keywords: Amazon
Enteric viruses
Flood
Negro river
qPCR
keywords: Amazonas
Vírus entéricos
Inundação
Rio Negro
Reação em Cadeia da Polimerase em Tempo Real
Issue Date: 2017
Publisher: Springer Verlag (Germany)
Citation: VIEIRA, Carmen Baur; et al. The Impact of the Extreme Amazonian Flood Season on the Incidence of Viral Gastroenteritis Cases. Food Environ Virol, v.9, p.195-207, 2017.
DOI: 10.1007/s12560-017-9280-x
ISSN: 1867-0334
Copyright: restricted access
Appears in Collections:AM - ILMD - Artigos de Periódicos
IOC - Artigos de Periódicos

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