Risk factors associated with seropositivity to porcine respiratory coronavirus in Danish swine herds
Identifieur interne : 001A26 ( Main/Exploration ); précédent : 001A25; suivant : 001A27Risk 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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Le document en format XML
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<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>
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<term>Herd size</term>
<term>Herd size measure</term>
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<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>
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<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>
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<country name="États-Unis"><region name="Californie"><name sortKey="Gardner, I" sort="Gardner, I" uniqKey="Gardner I" first="I." last="Gardner">I. Gardner</name>
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