Population dynamics of swine influenza virus in farrow-to-finish and specialised finishing herds in The Netherlands
Identifieur interne : 001009 ( Main/Exploration ); précédent : 001008; suivant : 001010Population dynamics of swine influenza virus in farrow-to-finish and specialised finishing herds in The Netherlands
Auteurs : W. L. A. Loeffen ; W. A. Hunneman ; J. Quak ; J. H. M. Verheijden ; J. A. StegemanSource :
- Veterinary Microbiology [ 0378-1135 ] ; 2009-05-04.
Descripteurs français
- Wicri :
- topic : Dynamique de la population.
English descriptors
- mix :
Abstract
Influenza virus infections with subtypes H1N1, H3N2 and H1N2 are very common in domestic pigs in Europe. Data on possible differences of population dynamics in finishing pigs in farrow-to-finish herds and in specialised finishing herds are, however, scarce. The presence of sows and weaned piglets on the same premises may, however, affect the exposure of finishing pigs to influenza viruses. In a longitudinal study on 14 farrow-to-finish herds and 15 finishing herds, groups of pigs were followed by repeatedly testing the same animals for antibodies against all three influenza virus subtypes (H1N1, H3N2 and H1N2). At the end of the finishing period, the seroprevalences in farrow-to-finish and specialised finishing herds were 44.3 and 62.0% respectively for H1N1, 6.6 and 19.3% respectively for H3N2, and 57.2 and 25.6% respectively for H1N2. For all three subtypes, the incidence of influenza virus infections was highest at the beginning of the finishing period in farrow-to-finish herds, while the incidence of influenza virus infections was highest at the end of the finishing period in finishing herds. Respiratory disease, probably related to the influenza infections, was observed in five of these herds only, but also occurred at the beginning of the finishing period in farrow-to-finish herds and at the end of the finishing period in finishing herds. The observed differences of population dynamics of influenza virus may affect choice and timing of intervention measures.
Url:
DOI: 10.1016/j.vetmic.2009.01.004
Affiliations:
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L. A." last="Loeffen">W. L. A. Loeffen</name></author><author><name sortKey="Hunneman, W A" sort="Hunneman, W A" uniqKey="Hunneman W" first="W. A." last="Hunneman">W. A. Hunneman</name></author><author><name sortKey="Quak, J" sort="Quak, J" uniqKey="Quak J" first="J." last="Quak">J. Quak</name></author><author><name sortKey="Verheijden, J H M" sort="Verheijden, J H M" uniqKey="Verheijden J" first="J. H. M." last="Verheijden">J. H. M. Verheijden</name></author><author><name sortKey="Stegeman, J A" sort="Stegeman, J A" uniqKey="Stegeman J" first="J. A." last="Stegeman">J. A. Stegeman</name></author></analytic><idno type="DOI">10.1016/j.vetmic.2009.01.004</idno><series><title level="j">Veterinary Microbiology</title><idno type="ISSN">0378-1135</idno><imprint><date type="datePub">2009-05-04</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>H1N1</term><term>H1N2</term><term>H3N2</term><term>Herd type</term><term>Incidence</term><term>Population dynamics</term><term>Swine influenza</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Dynamique de la population</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"> <p>Influenza virus infections with subtypes H1N1, H3N2 and H1N2 are very common in domestic pigs in Europe. Data on possible differences of population dynamics in finishing pigs in farrow-to-finish herds and in specialised finishing herds are, however, scarce. The presence of sows and weaned piglets on the same premises may, however, affect the exposure of finishing pigs to influenza viruses. In a longitudinal study on 14 farrow-to-finish herds and 15 finishing herds, groups of pigs were followed by repeatedly testing the same animals for antibodies against all three influenza virus subtypes (H1N1, H3N2 and H1N2). At the end of the finishing period, the seroprevalences in farrow-to-finish and specialised finishing herds were 44.3 and 62.0% respectively for H1N1, 6.6 and 19.3% respectively for H3N2, and 57.2 and 25.6% respectively for H1N2. For all three subtypes, the incidence of influenza virus infections was highest at the beginning of the finishing period in farrow-to-finish herds, while the incidence of influenza virus infections was highest at the end of the finishing period in finishing herds. Respiratory disease, probably related to the influenza infections, was observed in five of these herds only, but also occurred at the beginning of the finishing period in farrow-to-finish herds and at the end of the finishing period in finishing herds. The observed differences of population dynamics of influenza virus may affect choice and timing of intervention measures.</p> </div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Hunneman, W A" sort="Hunneman, W A" uniqKey="Hunneman W" first="W. A." last="Hunneman">W. A. Hunneman</name><name sortKey="Loeffen, W L A" sort="Loeffen, W L A" uniqKey="Loeffen W" first="W. L. A." last="Loeffen">W. L. A. Loeffen</name><name sortKey="Quak, J" sort="Quak, J" uniqKey="Quak J" first="J." last="Quak">J. Quak</name><name sortKey="Stegeman, J A" sort="Stegeman, J A" uniqKey="Stegeman J" first="J. A." last="Stegeman">J. A. Stegeman</name><name sortKey="Verheijden, J H M" sort="Verheijden, J H M" uniqKey="Verheijden J" first="J. H. M." last="Verheijden">J. H. M. Verheijden</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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