Prevalence study of Staphylococcus aureus in quarter milk samples of dairy cows in the Canton of Bern, Switzerland

In the present study, the prevalence of S. aureus in mammary gland quarters of dairy cows in Switzerland was estimated and a risk factor analysis was carried out. Dairy cows were selected by one-step-cluster sampling with stratification by herd size. Forty-seven of 50 randomly chosen farms participa...

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Veröffentlicht in:	Preventive veterinary medicine 2009, Vol.88 (1), p.72-76
Hauptverfasser:	Moret-Stalder, S., Fournier, C., Miserez, R., Albini, S., Doherr, M.G., Reist, M., Schaeren, W., Kirchhofer, M., Graber, H.U., Steiner, A., Kaufmann, T.
Format:	Artikel
Sprache:	eng
Schlagworte:	animal housing animal injuries Animals bovine mastitis Cattle Cattle Diseases - epidemiology Cattle Diseases - microbiology Cell Count - veterinary Cross-Sectional Studies dairy cows dairy herds disease prevalence Female Logistic Models Mastitis milk Milk - microbiology Multivariate Analysis Prevalence Risk Factors S. aureus somatic cell count Staphylococcal Infections - epidemiology Staphylococcal Infections - microbiology Staphylococcal Infections - veterinary Staphylococcus aureus Staphylococcus aureus - isolation & purification Switzerland Switzerland - epidemiology teats udder quarters
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Zusammenfassung:	In the present study, the prevalence of S. aureus in mammary gland quarters of dairy cows in Switzerland was estimated and a risk factor analysis was carried out. Dairy cows were selected by one-step-cluster sampling with stratification by herd size. Forty-seven of 50 randomly chosen farms participated in the study, resulting in 603 cows and 2388 quarter samples. Milk samples were collected in all herds on two occasions two weeks apart. In 6% of cows (95% CI: 2.7–9.3%) at least one milk sample was positive for S. aureus and from 2% (0.8–3.2%) of all quarters, S. aureus was cultured at least once. In four quarters a latent S. aureus infection (agent detected and somatic cell count (SCC)
ISSN:	0167-5877 1873-1716
DOI:	10.1016/j.prevetmed.2008.06.020