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Detection and genetic characterization of classic human astroviruses in Brazil, 2010-2012

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Abstract

The aims of this study were to monitor human astrovirus (HAstV) infections in patients presenting with acute gastroenteritis in Brazil and to determine the HAstV genotypes of these viruses. From May 2010 to July 2012, a total of 140 samples that were negative for both rotaviruses and noroviruses were randomly selected and tested for the presence of HAstV using an RT-PCR assay specific for the ORF2 region. Viral genotypes were identified and genetic diversity was investigated by sequencing. HAstV infection was detected in 2.9% of samples (4/140). The viruses in three samples were shown by phylogenetic analysis to belong to HAstV-4 lineage “c”, clustering together with strains detected in Europe and the Middle East. The virus in one sample was genotyped as HAstV-1 lineage “a”, clustering with strains from Uruguay, Brazil and Russia. Our findings provide further evidence for a global distribution of HAstV-1a and suggest a possible emergent importance of the HAstV-4c lineage in this country. The present study does not suggest that HAstVs currently have a major epidemiological impact, even after the introduction of a rotavirus vaccine in 2006.

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Author notes

  1. Simone Guadagnucci Morillo and Adriana Luchs are contribute equally to the work.

Authors and Affiliations

  1. Centro de Virologia, Núcleo de Doenças Entéricas, Instituto Adolfo Lutz, Av. Dr. Arnaldo, 355, São Paulo, SP, CEP 01246-902, Brazil

    Simone Guadagnucci Morillo, Adriana Luchs, Audrey Cilli, Rita de Cássia Compagnoli Carmona & Maria do Carmo S. T. Timenetsky

Authors
  1. Simone Guadagnucci Morillo
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  2. Adriana Luchs
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  3. Audrey Cilli
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  4. Rita de Cássia Compagnoli Carmona
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  5. Maria do Carmo S. T. Timenetsky
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Correspondence to Simone Guadagnucci Morillo, Adriana Luchs or Maria do Carmo S. T. Timenetsky.

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The authors declare that there is no conflict of interest.

Ethical approval

This study was carried out in accordance with the Declaration of Helsinki as revised in 2000, and approved by the Ethics Committee of the Adolfo Lutz Institute, São Paulo, Brazil (Ref. 088D-2009BM). Study participants were not required to provide informed consent, as this study was considered by the Ethics Committee to be part of routine surveillance activities.

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Handling Editor: Martin Schwemmle.

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Morillo, S.G., Luchs, A., Cilli, A. et al. Detection and genetic characterization of classic human astroviruses in Brazil, 2010-2012. Arch Virol 163, 1293–1297 (2018). https://doi.org/10.1007/s00705-018-3728-7

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  • DOI: https://doi.org/10.1007/s00705-018-3728-7

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