Serological survey of influenza A viruses in domestic and wild Suidae in Corsica (France), a Mediterranean island environment
Identifieur interne : 000222 ( France/Analysis ); précédent : 000221; suivant : 000223Serological survey of influenza A viruses in domestic and wild Suidae in Corsica (France), a Mediterranean island environment
Auteurs : Sébastien Grech-Angelini [France] ; Séverine Hervé [France] ; Nicolas Rose [France] ; Nicolas Barbier [France] ; François Casabianca [France] ; Oscar Maestrini [France] ; Alessandra Falchi ; Gaëlle Simon [France]Source :
- Preventive Veterinary Medicine [ 0167-5877 ] ; 2018.
Descripteurs français
- mix :
- Wicri :
- topic : Corse.
English descriptors
- mix :
Abstract
Corsica is a mountainous French island in the north-western Mediterranean Sea. It is a rural area, where pig farming is a major economic activity. Although no acute respiratory outbreaks due to swine influenza A viruses (swIAVs) have ever been reported in this free-ranging pig breeding system, influenza A viruses (IAVs) could be circulating within this pig population. A serological study was conducted as a first approach to domestic pigs and wild boars. Serum samples from 543 pigs raised on 91 different farms were collected during the 2013-2014 slaughtering season, and 279 sera from wild boars were obtained over four hunting seasons (between 2009 and 2014). They were first analysed by ELISA and then IAV positive and doubtful sera were subjected to haemagglutination inhibition tests using antigens representative of the four major enzootic swIAV lineages in Europe, i.e. avian-like swine H1N1 (H1(av)N1), pandemic-like swine H1N1 (H1N1pdm), H1N2 and H3N2. According to the ELISA results, 26.4% (CI95%: 17.7-36.7%) of herds had at least one positive animal (positive or doubtful by ELISA) and 12.4% (CI95%: 7.8-19.8%) of the pigs tested positive. Using the test characteristics (sensitivity and specificity), the true seroprevalence among Corsican pigs was estimated to be 16.4% (95% CI: 9.9-26.3). Antibodies directed against two different viral lineages were identified: H1N1pdm (in 66.2% and 45.8% of the IAV positive pigs and farms respectively) and H1avN1 (15.0% and 20.8% respectively). Evidence of exposure to viruses from two distinct lineages were detected on a single farm but in two different animals. Among the wild boars, 1.4% (CI95%: 0.4-3.6%) tested positive by ELISA and antibodies against the same two viruses were detected. Altogether, these results suggest that swIAVs from at least two different lineages are circulating among Corsican pigs, i.e. the H1N1pdm virus, probably introduced during the 2009 pandemic, and the H1(av)N1 virus, which is the most frequent swIAV in Europe. The low frequency of positive results observed in the Corsican wild boars hunted suggests that they would not play a major role in IAV dispersion dynamics on the island.
Url:
DOI: 10.1016/j.prevetmed.2018.06.004
Affiliations:
Links toward previous steps (curation, corpus...)
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- to stream Hal, to step Checkpoint: 000236
- to stream Main, to step Merge: 000431
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- to stream Main, to step Exploration: 000431
- to stream France, to step Extraction: 000222
Links to Exploration step
Hal:hal-02627080Le document en format XML
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type="institution" xml:id="struct-301715" status="VALID"> <orgName>Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail</orgName> <orgName type="acronym">ANSES</orgName> <date type="start">2010-07-01</date> <desc> <address> <addrLine>14 rue Pierre et Marie Curie94701 MAISONS-ALFORT Cedex</addrLine> <country key="FR"></country> </address> </desc> </org></tutelle></tutelles></hal:affiliation><country>France</country></affiliation></author></analytic><idno type="DOI">10.1016/j.prevetmed.2018.06.004</idno><series><title level="j">Preventive Veterinary Medicine</title><idno type="ISSN">0167-5877</idno><imprint><date type="datePub">2018</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>Corsica</term><term>Pig</term><term>Swine influenza A virus</term><term>Wild boar</term></keywords><keywords scheme="mix" xml:lang="fr"><term>Seroprevalence</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Corse</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"> <p>Corsica is a mountainous French island in the north-western Mediterranean Sea. It is a rural area, where pig farming is a major economic activity. Although no acute respiratory outbreaks due to swine influenza A viruses (swIAVs) have ever been reported in this free-ranging pig breeding system, influenza A viruses (IAVs) could be circulating within this pig population. A serological study was conducted as a first approach to domestic pigs and wild boars. Serum samples from 543 pigs raised on 91 different farms were collected during the 2013-2014 slaughtering season, and 279 sera from wild boars were obtained over four hunting seasons (between 2009 and 2014). They were first analysed by ELISA and then IAV positive and doubtful sera were subjected to haemagglutination inhibition tests using antigens representative of the four major enzootic swIAV lineages in Europe, i.e. avian-like swine H1N1 (H1(av)N1), pandemic-like swine H1N1 (H1N1pdm), H1N2 and H3N2. According to the ELISA results, 26.4% (CI95%: 17.7-36.7%) of herds had at least one positive animal (positive or doubtful by ELISA) and 12.4% (CI95%: 7.8-19.8%) of the pigs tested positive. Using the test characteristics (sensitivity and specificity), the true seroprevalence among Corsican pigs was estimated to be 16.4% (95% CI: 9.9-26.3). Antibodies directed against two different viral lineages were identified: H1N1pdm (in 66.2% and 45.8% of the IAV positive pigs and farms respectively) and H1avN1 (15.0% and 20.8% respectively). Evidence of exposure to viruses from two distinct lineages were detected on a single farm but in two different animals. Among the wild boars, 1.4% (CI95%: 0.4-3.6%) tested positive by ELISA and antibodies against the same two viruses were detected. Altogether, these results suggest that swIAVs from at least two different lineages are circulating among Corsican pigs, i.e. the H1N1pdm virus, probably introduced during the 2009 pandemic, and the H1(av)N1 virus, which is the most frequent swIAV in Europe. The low frequency of positive results observed in the Corsican wild boars hunted suggests that they would not play a major role in IAV dispersion dynamics on the island.</p> </div></front></TEI><affiliations><list><country><li>France</li></country></list><tree><noCountry><name sortKey="Falchi, Alessandra" sort="Falchi, Alessandra" uniqKey="Falchi A" first="Alessandra" last="Falchi">Alessandra Falchi</name></noCountry><country name="France"><noRegion><name sortKey="Grech Angelini, Sebastien" sort="Grech Angelini, Sebastien" uniqKey="Grech Angelini S" first="Sébastien" last="Grech-Angelini">Sébastien Grech-Angelini</name></noRegion><name sortKey="Barbier, Nicolas" sort="Barbier, Nicolas" uniqKey="Barbier N" first="Nicolas" last="Barbier">Nicolas Barbier</name><name sortKey="Casabianca, Francois" sort="Casabianca, Francois" uniqKey="Casabianca F" first="François" last="Casabianca">François Casabianca</name><name sortKey="Herve, Severine" sort="Herve, Severine" uniqKey="Herve S" first="Séverine" last="Hervé">Séverine Hervé</name><name sortKey="Maestrini, Oscar" sort="Maestrini, Oscar" uniqKey="Maestrini O" first="Oscar" last="Maestrini">Oscar Maestrini</name><name sortKey="Rose, Nicolas" sort="Rose, Nicolas" uniqKey="Rose N" first="Nicolas" last="Rose">Nicolas Rose</name><name sortKey="Simon, Gaelle" sort="Simon, Gaelle" uniqKey="Simon G" first="Gaëlle" last="Simon">Gaëlle Simon</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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