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Pathological Lesions in Swine At Slaughter

VI. The Relation Between Some Mainly Non-Environmental Factors, Diseases, Weight Gain and Carcass Quality

Patologiske funn på gris ved slakting. VI. Sammenheng mellom patologiske funn og daglig tilvekst og mellom noen overueiende ikke miljømessige faktorer og sjukdom, tilvekst og slaktekvalitet

Acta Veterinaria Scandinavica volume 25, pages 309–321 (1984)Cite this article

Abstract

The influence of some diseases (lesions at slaughter) on daily weight gain and the relation between some mainly non-environmental factors and diseases, weight gain and carcass quality were studied in 12 herds running an all in/all out fattener production. The material consisted of 9800 baconers slaughtered in the period 1975–1977. The piglets were purchased when about 10 weeks old. The number of batches was 60.

The investigation showed that 6 of the 12 diseases included in the analyses had a statistically significant influence on daily weight gain: pyaemia, atrophic rhinitis, severe and moderate pneumonia, tail lesion and scabies. The effect varied from a calculated reduction of 60 g in daily weight gain in pigs having atrophic rhinitis to a positive influence of 5 g/day in animals with recorded scabies lesions.

It was also found that an increase in weight of marketing piglets would reduce the risk of contracting many diseases and accordingly increase the frequency of healthy animals. It also seemed possible to increase the frequencies of healthy animals by buying quality piglets. Further, quality piglets had a positive relation to weight gain and best paid carcasses (highest quality). Analyses of flock based antiparasitic treatment were inconclusive with regard to weight gain, parasitic hepatitis and scabies.

Sammendrag

De nevnte forhold ble studert i 12 besetninger med alt inn/alt ut produksjon av slaktegris. Materialet bestod av 9800 gris slaktet i Perioden 1975–1977. Grisene ble innkjøpt ca. 10 uker garnie. Det totale antall innsett var 60. Sjukdomsfunn gjort ved kjøttkontrollen sammen med andre data fra slakteriet og registreringer utført i besetningene dannet grunnlaget for de statistiske beregninger.

Undersøkelsen viste at 6 av de 12 sykdommer som inngikk i analysene, hadde en statistisk sikker innflytelse på daglig tilvekst, nemlig: Pyaemi,, atrofisk rhinitt, utbredt og moderat lungebetennelse, halesår og skabb. Utslaget svingte mellom en redusert tilvekst på 60 g/dag for atrofisk rhinitt til en øket tilvekst på 5 g ved påviste skabblesjoner.

Det ble funnet at en økning i smågrisvekt ville redusere frekvensen av flere sjukdommer og følgelig resultere i høyere frekvens friske dyr. Det synes videre å vsere en positiv sammenheng mellom kvalitetssmågris og friske dyr, daglig tilvekst og høy slaktekvalitet.

Antiparasitser behandling mot spolorm og skabb sa ikke ut til å ha noen klar positiv effekt verken på tilvekst eller parasittlesjoner i lever og hud.

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  1. Regional Veterinary Laboratory, Sandnes, Norway

    Jørn Grønvold

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Supported by grants from the Norwegian Agricultural Research Council.

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Grønvold, J. Pathological Lesions in Swine At Slaughter. Acta Vet Scand 25, 309–321 (1984). https://doi.org/10.1186/BF03547245

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Acta Veterinaria Scandinavica

ISSN: 1751-0147