{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,17]],"date-time":"2026-07-17T10:58:43Z","timestamp":1784285923522,"version":"3.55.0"},"reference-count":26,"publisher":"Cambridge University Press (CUP)","issue":"1","license":[{"start":{"date-parts":[[2009,6,1]],"date-time":"2009-06-01T00:00:00Z","timestamp":1243814400000},"content-version":"unspecified","delay-in-days":5234,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Dairy Research"],"published-print":{"date-parts":[[1995,2]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>A comprehensive description of the health status of 2406 cows in 28 herds was used to study complex interrelationships between <jats:italic>Staphylococcus aureus<\/jats:italic> occurrence and potential risk factors at the cow level over a broad spectrum of production conditions. The objective of the study was to characterize those cows shedding <jats:italic>Staph, aureus<\/jats:italic> in milk and to provide indications of possible causal relations that should be further explored. The estimates are expected to aid in providing valid and precise evaluations of results from cross sectional microbiological examination of bovine (quarter) milk samples. <jats:italic>Staph, aureus<\/jats:italic> were isolated at microbiological examination of quarter milk from 5\u00b72, 13\u00b75, 17\u00b79 and 22\u00b70% of 1552, 490, 296 and 277 cows in lactations 1, 2, 3 and 4\u20139 respectively. Simultaneous isolation of other mastitis pathogens was not significantly associated with occurrence of <jats:italic>Staph, aureus<\/jats:italic>. Of the positive samples, 95% had a positive California mastitis test reaction. Among the clinical measures of udder health, only visibly abnormal milk combined with normal udder tissue was associated with increased occurrence of <jats:italic>Staph, aureus<\/jats:italic>, although not consistently. Prior antibiotic treatment for udder disorders was not significantly associated with <jats:italic>Staph, aureus<\/jats:italic> isolation. The occurrence of sole ulcers in multiple digits was consistently associated with <jats:italic>Staph, aureus<\/jats:italic> in the first lactation. Milk yield was involved in interactions with other pathogens isolated, prior veterinary disease treatment, body weight and season of calving. Strong herd-year effects were revealed. This, combined with the interactions, indicated that some herd-specific factors were major determinants of <jats:italic>Staph, aureus<\/jats:italic> occurrence. The study indicated which cow characteristics should be taken into account in epidemiological analyses and causal interpretations of data from cross sectional microbiological examinations of dairy herds.<\/jats:p>","DOI":"10.1017\/s0022029900033689","type":"journal-article","created":{"date-parts":[[2009,6,5]],"date-time":"2009-06-05T06:15:52Z","timestamp":1244182552000},"page":"69-81","source":"Crossref","is-referenced-by-count":4,"title":["Dairy cow characteristics related to <i>Staphylococcus aureus<\/i> isolation from quarter samples"],"prefix":"10.1017","volume":"62","author":[{"given":"Carsten","family":"Enevoldsen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yrj\u00f6 T.","family":"Gr\u00f6hn","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Iver","family":"Thysen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2009,6,1]]},"reference":[{"key":"S0022029900033689_ref006","first-page":"1","article-title":"Cell counts in bovine milk, causes of variation and applicability for diagnosis of subclinical mastitis","volume":"80","author":"Brolund","year":"1985","journal-title":"Acta Veterinaria Scandinavica"},{"key":"S0022029900033689_ref009","doi-asserted-by":"publisher","DOI":"10.3168\/jds.S0022-0302(91)78285-4"},{"key":"S0022029900033689_ref026","doi-asserted-by":"publisher","DOI":"10.1136\/vr.106.21.431"},{"key":"S0022029900033689_ref020","first-page":"495","article-title":"Review of mastitis in dairy cows: Infectious processes, epidemiology, diagnosis, and control methods","volume":"161","author":"Poutrel","year":"1985","journal-title":"Recueil de M\u00e9decine V\u00e9t\u00e9rinaire"},{"key":"S0022029900033689_ref019","unstructured":"Petersen E. 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