Abstract
Individual health records collected from 1984 to 1986 in 70 swine-herds in the south-eastern part of Norway were analysed by epidemiological methods. The incidence rate for most of the reported diseases was less than 1 % per farrowing, and a majority of disease recordings concerned 6 frequently-occurring conditions. The incidence of several diseases was lower in crossbred sows compared to purebred Norwegian landrace sows. The risk of most diseases increased in sows that had been ill previously, and also in litters from sows that had previously had diseased litters. Disease risk in piglets also increased if the sow became ill during the first few days after farrowing. The reduced performance associated with most of the common diseases impacts adversely on economic returns.
Keywords: disease recording, health cards, swine, MMA-syndrome, mastitis, metritis, neonatal diarrhoea, arthritis, scrotal hernia
Sammendrag
Individuelle sjukdomsregistreringer ble gjennomført i 70 svinebesetninger fra 1984 til 1986. De fleste sjukdommene hadde en lavere insidens enn 1 % per grising, og flesteparten av registreringene skyldtes 6 sjukdommer. Det ble observert en lavere insidens av flere viktige sjukdommer hos hybridpurker enn hos purker av norsk landrase. Undersøkelsen viste at der var økt risiko for sjukdom hos purker som hadde vært sjuke tidligere, og økt risiko for sjukdom i kull etter purker som tidligere hadde hatt sjuke kull. Risikoen for opptreden av spedgris-diaré og leddbetennelse hos spedgrisen var også forøket hvis purka ble sjuk av enten MMA-syndromet, mastitt eller metritt etter grising. De fleste av de hyppige forekommende lideisene har økonomiske konsekvenser i form av redusert produksjon.
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