Left-side displacement of the abomasum in dairy cows at pasture
| Autor: | Davis Gm, A. S. Vawser, T. F. Jubb, J. Malmo |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Veterinary medicine
Population Stomach Diseases Cattle Diseases Ketone Bodies Biology Breeding Frame size Pasture Abomasum Animal science Risk Factors Lactation Grazing medicine Animals education geography education.field_of_study geography.geographical_feature_category General Veterinary Sire Age Factors food and beverages General Medicine Animal Feed medicine.anatomical_structure Case-Control Studies Herd Cattle Female |
| Zdroj: | Australian veterinary journal. 68(4) |
| ISSN: | 0005-0423 |
| Popis: | SUMMARY The presentation of approximately 40 dairy cows affected with left-side displacement of the abomasum (LDA) per annum In a cattle practice in East Gippsland, Victoria provided an opportunity to conduct a survey and case-control study of the disease in a grazing environment. The study, Involving 37 dairy cows at pasture, revealed significant differences from the pattern of the disease occurring In the northern hemisphere where cows In older age groups, of larger frame size, higher production and fed high grain rations are at Increased risk. Affected cows were diagnosed over a 10-month period and represented approximately 0.06% of the dairy cow population. Most cases were diagnosed In the early lactation period. Evidence for a genetic predisposition was suggested by the discovery that one sire generated a disproportionately large number (9) of the cows with LDA. Although affected cows were average producers in their herds, being a member of a high-producing herd was a significant risk factor. |
| Databáze: | OpenAIRE |
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