Abstract
Joint and bone lesions in Norwegian breeding pigs are described on the background of an investigation involving 174 sows and 155 boars from 7 months to 4½ years old. Lesions, which consisted predominantly of arthrosis, degeneration of intervertebral discs, spondylosis and epiphyseal separations, were demonstrated frequently in both sexes. Osteochondrosis, a condition previously demonstrated frequently in slaughter pigs, had either completely healed, undergone repair or developed into an arthrosis by the time the animal reached an age of about 1½ years.
Whereas a higher incidence of arthrosis of the intervertebral joints was found in boars than in sows, the reverse was true as regards degeneration of the intervertebral discs and anchylosing spondylosis. Possible reasons for this are discussed. Norwegian pigs show a higher incidence of lesions in the lumbar region of the vertebral column than has been described up to the present time in other countries.
Keywords: osteochondrosis, arthrosis, pig
Sammendrag
Ledd- og skjelettlesjoner hos norske avlsgriser er beskrevet etter undersøkelse av 174 purker og 155 råner fra 7 mndr til 4½ år gamle. Lesjonene, som vesentlig besto av arthrose, degenerasjon av intervertebralskiver, Spondylose og epifyseløsninger, ble hyppig påvist hos begge kjønn. Osteochondrose, som en tidligere hyppig har påvist hos slaktegriser, var enten helet, reparert eller utviklet til en arthrose når dyra var blitt omkring 1½ år gamle. Arthrose i intervertebralledda ble oftere påvist hos råner enn hos purker, mens det var omvendt med hensyn til degenererte intervertebralskiver og Spondylose. Mulige årsaker til dette er diskutert. Norske griser hadde en høyere forekomst av lesjoner i lumbaldelen av ryggen enn til nå beskrevet fra andre land.
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