Experiences after Twenty Months with Pandemic Influenza A (H1N1) 2009 Infection in the Naïve Norwegian Pig Population

Pandemic (H1N1) 2009 influenza A virus was detected in Norwegian pigs in October 2009. Until then, Norway was regarded free of swine influenza. Intensified screening revealed 91 positive herds within three months. The virus was rapidly transmitted to the susceptible population, including closed bree...

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Autores principales: Gjerset, B., Er, C., Løtvedt, S., Jørgensen, A., Hungnes, O., Lium, B., Germundsson, A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2011
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3447302/
https://www.ncbi.nlm.nih.gov/pubmed/23074654
http://dx.doi.org/10.1155/2011/206975
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author Gjerset, B.
Er, C.
Løtvedt, S.
Jørgensen, A.
Hungnes, O.
Lium, B.
Germundsson, A.
author_facet Gjerset, B.
Er, C.
Løtvedt, S.
Jørgensen, A.
Hungnes, O.
Lium, B.
Germundsson, A.
author_sort Gjerset, B.
collection PubMed
description Pandemic (H1N1) 2009 influenza A virus was detected in Norwegian pigs in October 2009. Until then, Norway was regarded free of swine influenza. Intensified screening revealed 91 positive herds within three months. The virus was rapidly transmitted to the susceptible population, including closed breeding herds with high biosecurity. Humans were important for the introduction as well as spread of the virus to pigs. Mild or no clinical signs were observed in infected pigs. Surveillance of SIV in 2010 revealed that 41% of all the Norwegian pig herds had antibodies to pandemic (H1N1) 2009 virus. Furthermore, this surveillance indicated that pigs born in positive herds after the active phase did not seroconvert, suggesting no ongoing infection in the herds. However, results from surveillance in 2011 show a continuing spread of the infection in many herds, either caused by new introduction or by virus circulation since 2009.
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spelling pubmed-34473022012-10-16 Experiences after Twenty Months with Pandemic Influenza A (H1N1) 2009 Infection in the Naïve Norwegian Pig Population Gjerset, B. Er, C. Løtvedt, S. Jørgensen, A. Hungnes, O. Lium, B. Germundsson, A. Influenza Res Treat Research Article Pandemic (H1N1) 2009 influenza A virus was detected in Norwegian pigs in October 2009. Until then, Norway was regarded free of swine influenza. Intensified screening revealed 91 positive herds within three months. The virus was rapidly transmitted to the susceptible population, including closed breeding herds with high biosecurity. Humans were important for the introduction as well as spread of the virus to pigs. Mild or no clinical signs were observed in infected pigs. Surveillance of SIV in 2010 revealed that 41% of all the Norwegian pig herds had antibodies to pandemic (H1N1) 2009 virus. Furthermore, this surveillance indicated that pigs born in positive herds after the active phase did not seroconvert, suggesting no ongoing infection in the herds. However, results from surveillance in 2011 show a continuing spread of the infection in many herds, either caused by new introduction or by virus circulation since 2009. Hindawi Publishing Corporation 2011 2012-01-03 /pmc/articles/PMC3447302/ /pubmed/23074654 http://dx.doi.org/10.1155/2011/206975 Text en Copyright © 2011 B. Gjerset et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Gjerset, B.
Er, C.
Løtvedt, S.
Jørgensen, A.
Hungnes, O.
Lium, B.
Germundsson, A.
Experiences after Twenty Months with Pandemic Influenza A (H1N1) 2009 Infection in the Naïve Norwegian Pig Population
title Experiences after Twenty Months with Pandemic Influenza A (H1N1) 2009 Infection in the Naïve Norwegian Pig Population
title_full Experiences after Twenty Months with Pandemic Influenza A (H1N1) 2009 Infection in the Naïve Norwegian Pig Population
title_fullStr Experiences after Twenty Months with Pandemic Influenza A (H1N1) 2009 Infection in the Naïve Norwegian Pig Population
title_full_unstemmed Experiences after Twenty Months with Pandemic Influenza A (H1N1) 2009 Infection in the Naïve Norwegian Pig Population
title_short Experiences after Twenty Months with Pandemic Influenza A (H1N1) 2009 Infection in the Naïve Norwegian Pig Population
title_sort experiences after twenty months with pandemic influenza a (h1n1) 2009 infection in the naïve norwegian pig population
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3447302/
https://www.ncbi.nlm.nih.gov/pubmed/23074654
http://dx.doi.org/10.1155/2011/206975
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