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Epidemiological and Genetical Studies in Norwegian Pig Herds

Epidemiologiske og genetiske studier av sjukdommer i norske svinebesetninger. III. Besetningseffekter

III. Herd Effects

Abstract

Herd differences in disease incidence in 70 Norwegian pig herds were assessed by health card registrations. Such differences proved to be considerable. The incidence of the MMA-syndrome, mastitis, metritis and neonatal diarrhoea was higher in herds producing only weaners (”weaner herds”) than in herds with combined production. The mean disease incidence in herds providing breeding stock for the Norwegian Pig Breeders’ Association (”breeding herds”) was at the same level as in ordinary combined production herds. There was no consistent relationship between changes in disease incidence and herd size, though the incidence of the MMA-syndrome was lower in the largest herds.

Sammendrag

Undersøkelsen er basert på individuelle helsekortregistreringer i 70 svinebesetninger i Hedmark, og tar i hovedsak for seg forskjeller i sjykdomsinsidens mellom besetninger. De ble påvist store forskjeller mellom besetningene, og det var også signifikante forskjeller i sjukdomsinsidens mellom ulike besetningskategorier. Smågrisprodusenter hadde en høyere insidens av flere viktige sjukdommer sammenlignet med besetninger med kombinert produksjon. Sjukdomsinsidensen i foredlingsbesetningene var på samme nivå som ordinære besetninger med kombinert produksjon. Det kunne ikke påvises generelle, systematiske forskjeller i sjukdomsinsidens med økende besetningsstørrelse, men for MMA-syndromet var det en lavere insidens i de største besetningene.

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Lingaas, F. Epidemiological and Genetical Studies in Norwegian Pig Herds. Acta Vet Scand 32, 97–105 (1991). https://doi.org/10.1186/BF03547001

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