Risk factors associated with seropositivity to porcine respiratory coronavirus in Danish swine herds
Identifieur interne : 001260 ( Main/Exploration ); précédent : 001259; suivant : 001261Risk factors associated with seropositivity to porcine respiratory coronavirus in Danish swine herds
Auteurs : J. Flori [Danemark] ; J. Mousing [Danemark] ; I. Gardner [États-Unis] ; P. Willeberg [Danemark] ; P. Have [Danemark]Source :
- Preventive Veterinary Medicine [ 0167-5877 ] ; 1995.
English descriptors
- Teeft :
- Airborne transmission, Antigenic sites, Biosecurity measures disease status, Blood samples, Boar, Boars gilts, Callebaut, Change clothes, Coronavirus, Danish swine herds, Design variables, Epithelial cells, External boar, Flori, Full dataset, Funen, Gastroenteritis, Gastroenteritis virus, Geographical location, Heat loss, Herd, Herd size, Herd size measure, Independent variables, Interaction terms, Jutland, Jutland peninsula, Large herds, Logistic regression, Logistic regression model, Main effects, Manure purchase, Monoclonal antibodies, Natural logarithm, Neighbouring, Neighbouring herds, Neighbouring swine farms, Neighbouring swine herd, Odds ratios, Open bars, Outcome herd, Pensaert, Peplomer protein, Pig, Pigs fatteners, Porcine, Porcine coronavirus, Potential risk factors, Prcv, Prcv infection, Reference population, Regression model, Respiratory diseases, Risk factors, Same group, Sample proportions, Serological status, Seropositive, Seropositive herd, Seropositive reactions, Seropositivity, Significant interactions, Slatted floor, Slurry, Slurry system, Solid bars, Statistical analysis, Statistical analysis systems institute, Study herds, Swine, Swine herds, Tgev, Transmissible, Transmissible gastroenteritis virus, Veterinary epidemiology, Veterinary medicine.
Abstract
Abstract: Serological screening of swine herds in 1984 indicated that porcine respiratory coronavirus (PRCV) had been introduced into Denmark. To determine risk factors associated with the introduction of PRCV, a cross-sectional study of 408 Danish swine herds was carried out between May 1985 and June 1986. The association between herd-PRCV serological status and possible risk factors, obtained from a field questionnaire, was assessed by unconditional maximum likelihood logistic regression. An increasing herd size, location in the Jutland peninsula (compared with location on the island of Funen) (OR = 7.9 in a multivariable logistic regression model not including interaction terms), the presence of a slurry system (i.e. pigs living on a slatted floor) (OR = 4.6) and purchase of pigs (OR= 1.7) were significantly (P < 0.05) associated with seropositivity. Two significant interactions, both involving herd size, were subsequently identified. The PRCV serological status of neighbouring herds was found to be related, and closeness of a seropositive herd was associated with an increased risk of a herd being serologically positive. The results of this study indicate that herd size may be an important determinant of airborne transmission of PRCV infection, and that herd size may modify the effect of other risk factors.
Url:
DOI: 10.1016/0167-5877(95)00498-X
Affiliations:
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Flori</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Federation of Danish Pig Producers and Slaughterhouses, Axelborg, Axeltorv 3, DK-1609 Copenhagen V</wicri:regionArea><wicri:noRegion>DK-1609 Copenhagen V</wicri:noRegion></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>Division of Ethology and Health, Royal Veterinary and Agricultural University, Bülowsvej 13, DK-1870 Frederiksberg C</wicri:regionArea><wicri:noRegion>DK-1870 Frederiksberg C</wicri:noRegion></affiliation></author><author><name sortKey="Mousing, J" sort="Mousing, J" uniqKey="Mousing J" first="J." last="Mousing">J. 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Have</name><affiliation wicri:level="1"><country xml:lang="fr">Danemark</country><wicri:regionArea>State Veterinary Institute for Virus Research, Lindholm, DK-4771 Kalvehave</wicri:regionArea><wicri:noRegion>DK-4771 Kalvehave</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Preventive Veterinary Medicine</title><title level="j" type="abbrev">PREVET</title><idno type="ISSN">0167-5877</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1995">1995</date><biblScope unit="volume">25</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="51">51</biblScope><biblScope unit="page" to="62">62</biblScope></imprint><idno type="ISSN">0167-5877</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0167-5877</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Airborne transmission</term><term>Antigenic sites</term><term>Biosecurity measures disease status</term><term>Blood samples</term><term>Boar</term><term>Boars gilts</term><term>Callebaut</term><term>Change clothes</term><term>Coronavirus</term><term>Danish swine herds</term><term>Design variables</term><term>Epithelial cells</term><term>External boar</term><term>Flori</term><term>Full dataset</term><term>Funen</term><term>Gastroenteritis</term><term>Gastroenteritis virus</term><term>Geographical location</term><term>Heat loss</term><term>Herd</term><term>Herd size</term><term>Herd size measure</term><term>Independent variables</term><term>Interaction terms</term><term>Jutland</term><term>Jutland peninsula</term><term>Large herds</term><term>Logistic regression</term><term>Logistic regression model</term><term>Main effects</term><term>Manure purchase</term><term>Monoclonal antibodies</term><term>Natural logarithm</term><term>Neighbouring</term><term>Neighbouring herds</term><term>Neighbouring swine farms</term><term>Neighbouring swine herd</term><term>Odds ratios</term><term>Open bars</term><term>Outcome herd</term><term>Pensaert</term><term>Peplomer protein</term><term>Pig</term><term>Pigs fatteners</term><term>Porcine</term><term>Porcine coronavirus</term><term>Potential risk factors</term><term>Prcv</term><term>Prcv infection</term><term>Reference population</term><term>Regression model</term><term>Respiratory diseases</term><term>Risk factors</term><term>Same group</term><term>Sample proportions</term><term>Serological status</term><term>Seropositive</term><term>Seropositive herd</term><term>Seropositive reactions</term><term>Seropositivity</term><term>Significant interactions</term><term>Slatted floor</term><term>Slurry</term><term>Slurry system</term><term>Solid bars</term><term>Statistical analysis</term><term>Statistical analysis systems institute</term><term>Study herds</term><term>Swine</term><term>Swine herds</term><term>Tgev</term><term>Transmissible</term><term>Transmissible gastroenteritis virus</term><term>Veterinary epidemiology</term><term>Veterinary medicine</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Serological screening of swine herds in 1984 indicated that porcine respiratory coronavirus (PRCV) had been introduced into Denmark. To determine risk factors associated with the introduction of PRCV, a cross-sectional study of 408 Danish swine herds was carried out between May 1985 and June 1986. The association between herd-PRCV serological status and possible risk factors, obtained from a field questionnaire, was assessed by unconditional maximum likelihood logistic regression. An increasing herd size, location in the Jutland peninsula (compared with location on the island of Funen) (OR = 7.9 in a multivariable logistic regression model not including interaction terms), the presence of a slurry system (i.e. pigs living on a slatted floor) (OR = 4.6) and purchase of pigs (OR= 1.7) were significantly (P < 0.05) associated with seropositivity. Two significant interactions, both involving herd size, were subsequently identified. The PRCV serological status of neighbouring herds was found to be related, and closeness of a seropositive herd was associated with an increased risk of a herd being serologically positive. The results of this study indicate that herd size may be an important determinant of airborne transmission of PRCV infection, and that herd size may modify the effect of other risk factors.</div></front></TEI><affiliations><list><country><li>Danemark</li><li>États-Unis</li></country><region><li>Californie</li></region></list><tree><country name="Danemark"><noRegion><name sortKey="Flori, J" sort="Flori, J" uniqKey="Flori J" first="J." last="Flori">J. Flori</name></noRegion><name sortKey="Flori, J" sort="Flori, J" uniqKey="Flori J" first="J." last="Flori">J. Flori</name><name sortKey="Have, P" sort="Have, P" uniqKey="Have P" first="P." last="Have">P. Have</name><name sortKey="Mousing, J" sort="Mousing, J" uniqKey="Mousing J" first="J." last="Mousing">J. Mousing</name><name sortKey="Willeberg, P" sort="Willeberg, P" uniqKey="Willeberg P" first="P." last="Willeberg">P. Willeberg</name></country><country name="États-Unis"><region name="Californie"><name sortKey="Gardner, I" sort="Gardner, I" uniqKey="Gardner I" first="I." last="Gardner">I. Gardner</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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