Tropical Animal Health and Production

, Volume 47, Issue 1, pp 237–241 | Cite as

High frequency of porcine norovirus infection in finisher units of Brazilian pig-production systems

  • Patrícia F. N. Silva
  • Alice F. Alfieri
  • Aline F. Barry
  • Raquel de Arruda Leme
  • Noemi R. Gardinali
  • Wim H. M. van der Poel
  • Amauri Alcindo Alfieri
Short Communications


Norovirus (NoV) is a member of the Caliciviridae family and is considered an emerging human enteric pathogen. NoVs are detected in farm animals such as cattle, sheep and pigs. Porcine NoV (PoNoV) is widespread worldwide, but frequency of infection is often low. This study aimed to investigate the natural PoNoV infection from adult animals of an important Brazilian pig-production region. Faecal samples (n = 112) of asymptomatic pigs aged 9 to 24 weeks old were collected from 16 grower-to-finish herds located in Paraná state, Brazilian Southern region, and evaluated for PoNoV presence. A reverse transcription-polymerase chain reaction (RT-PCR) assay was performed using specific primers that target a conserved region of the virus capsid gene (VP1). PoNoV was detected in 58 (51.8 %) of the 112 faecal samples and in 14 (87.5 %) of the 16 herds evaluated. Six of the obtained amplicons were submitted to phylogenetic genotyping analysis. The higher nucleotide (86.5–97.4 %) and amino acid (100 %) similarities of the sequences in this study were with the representative strains of the porcine NoV genogroup II genotype 11 (PoNoV GII-11). These results reveal that PoNoV infection is endemic in one of the most important pork production areas of Brazil and that the PoNoV GII-11 is prevalent in this region.


Calicivirus Enteric virus Faeces Intestinal health Molecular epidemiology Swine 



The authors would like to thank the following Brazilian Institutes for the financial support: the National Counsel of Scientific and Technological Development (CNPq), the Brazilian Federal Agency for Support and Evaluation of Graduate Education (CAPES), Financing of Studies and Projects (FINEP) and the Araucaria Foundation (FAP/PR). Alfieri A.A., Alfieri A.F. and de Arruda Leme R. are recipients of the CNPq fellowships.

Conflict of interest

The authors declared no potential conflicts of interest with respect to the research, authorship and/or publication of this article.


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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Patrícia F. N. Silva
    • 1
  • Alice F. Alfieri
    • 1
  • Aline F. Barry
    • 1
  • Raquel de Arruda Leme
    • 1
  • Noemi R. Gardinali
    • 1
  • Wim H. M. van der Poel
    • 2
  • Amauri Alcindo Alfieri
    • 1
  1. 1.Laboratory of Animal Virology, Department of Preventive Veterinary MedicineUniversidade Estadual de LondrinaLondrinaBrazil
  2. 2.Department of Virology, Central Veterinary Institute,Wageningen University and Research CentreLelystadThe Netherlands

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