<abstract xmlns="http://www.w3.org/1999/xhtml"><bold>Introduction:</bold> The aim of this study was to assess the seroprevalence of swine influenza A virus (SIV) in Polish farrow-to-finish pig herds.<bold>Material and Methods:</bold> Serum samples collected from 5,952 pigs, from 145 farrow-to-finish herds were tested for the presence of antibodies against H1N1, H1N1pdm09, H1N2, and H3N2 SIV subtypes using haemagglutination inhibition (HI) test. Samples with HI titres equal or higher than 20 were considered positive.<bold>Results:</bold> HI antibodies to at least one of the analysed SIV subtypes were detected in 129 (89%) herds and in 2,263 (38%) serum samples. Antibodies to multiple SIV subtypes were detected in 104 (71.7%) herds and in 996 (16.7%) serum samples. Concerning the seroprevalence rate, according to age category, the highest prevalence of the antibodies was detected in weaners, with regard to the H1N1, H1N2, and H3N2, and in sows, with regard to the H1N1pdm09. The lowest seroprevalence for all evaluated SIV subtypes was detected in finishers.<bold>Conclusion:</bold> The study indicates that antibodies against single and multiple SIV subtypes are circulating in Polish farrow-to-finish herds and highlights the importance of conducting a molecular surveillance programme in future studies.</abstract>

Introduction: The aim of this study was to assess the seroprevalence of swine influenza A virus (SIV) in Polish farrow-to-finish pig herds.Material and Methods: Serum samples collected from 5,952 pigs, from 145 farrow-to-finish herds were tested for the presence of antibodies against H1N1, H1N1pdm09, H1N2, and H3N2 SIV subtypes using haemagglutination inhibition (HI) test. Samples with HI titres equal or higher than 20 were considered positive.Results: HI antibodies to at least one of the analysed SIV subtypes were detected in 129 (89%) herds and in 2,263 (38%) serum samples. Antibodies to multiple SIV subtypes were detected in 104 (71.7%) herds and in 996 (16.7%) serum samples. Concerning the seroprevalence rate, according to age category, the highest prevalence of the antibodies was detected in weaners, with regard to the H1N1, H1N2, and H3N2, and in sows, with regard to the H1N1pdm09. The lowest seroprevalence for all evaluated SIV subtypes was detected in finishers.Conclusion: The study indicates that antibodies against single and multiple SIV subtypes are circulating in Polish farrow-to-finish herds and highlights the importance of conducting a molecular surveillance programme in future studies.

Serological survey of the influenza A virus in Polish farrow-to-finish pig herds in 2011–2015

Department of Swine Diseases, National Veterinary Research Institute

Journal of Veterinary Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introduction: The aim of this study was to assess the seroprevalence of swine influenza A virus (SIV) in Polish farrow-to-finish pig herds.Material and...

Serological survey of the influenza A virus in Polish farrow-to-finish pig herds in 2011–2015

Published Online: Jun 12, 2017

Page range: 157 - 161

Received: Feb 09, 2017

Accepted: May 12, 2017

DOI: https://doi.org/10.1515/jvetres-2017-0020

Keywords
pigs, influenza virus, seroprevalence, co-seropositivity, Poland

© 2017 Ewelina Czyżewska-Dors et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Serological survey of the influenza A virus in Polish farrow-to-finish pig herds in 2011–2015

Published Online: Jun 12, 2017

Page range: 157 - 161

Received: Feb 09, 2017

Accepted: May 12, 2017

DOI: https://doi.org/10.1515/jvetres-2017-0020

Keywordspigs, influenza virus, seroprevalence, co-seropositivity, Poland

© 2017 Ewelina Czyżewska-Dors et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
pigs, influenza virus, seroprevalence, co-seropositivity, Poland