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| Bennedsgaard, Torben Werner; Thamsborg, Stig Milan; Aarestrup, Frank Møller; Enevoldsen, Carsten; Vaarst, Mette; Christoffersen, Anna Bodil. |
| Quarter milk samples from cows with high risk of intramammary infection were examined to determine the prevalence of Staphylococcus aureus (SA) and penicillin resistant SA (SAr) in conventional and organic dairy herds and herds converting to organic farming in a combined longitudinal and cross-sectional study. 20 conventional herds, 18 organic herds that converted before 1995, and 19 herds converting to organic farming in 1999 or 2000 were included in the study. Herds converting to organic farming were sampled three times one year apart; the other herds were sampled once. Risk of infection was estimated based on somatic cell count, milk production, breed, age and lactation stage. The high-risk cows represented about 49 % of the cows in the herds. The... |
| Tipo: Journal paper |
Palavras-chave: Health and welfare. |
| Ano: 2006 |
URL: http://orgprints.org/4714/1/4714_ny.pdf |
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