Survey of intramammary infections in ewes on the New England Tableland of New South Wales [sheep]
1990
Watson, D.L. | Franklin, N.A. (Commonwealth Scientific and Industrial Research Organization, Armidale (Australia). Div. of Animal Health) | Davies, H.I. (New England Univ., Armidale (Australia). Dept. of Mathematics, Statistics and Computing Science) | Kettlewell, P. | Frost, A.J. (Queensland Univ., St Lucia (Australia). Dept. of Veterinary Pathology and Public Health)
Of 1093 ewes from 8 flocks, the prevalence of intrammammary infection was 14 percent of ewes (8 percent of glands). There was a tendency for prevalence of intramammary infection to be positively correlated with age of the ewe (2-year-old and 6-year-old ewes had, respectively, 4.4 percent and 14.0 percent of glands infected). This relationship was highly significant for Border Leicester x Merino ewes. There were also significant differences in infection prevalence between breeds. Infected glands had a higher prevalence of clinical abnormalities of udder, teat and secretion than did non-infected glands. Staphylococcus aureus was overwhelmingly the most frequently isolated bacterium being responsible for 40 percent of all intramammary infections.
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