prevalence and distribution of mastitis pathogens in subclinically infected dairy cows in flanders, belgium.the main objective was to determine the prevalence of intramammary infections (imi) in dairy cows in flanders, belgium. data were obtained from quarter milk samples of dairy herds subjected to a mandatory yearly screening of all lactating cows. a total of 178,668 quarter milk samples were collected at 1087 cross-sectional dairy herd screenings performed in three consecutive years. of the dairy cows, 40% had at least one culture-positive quarter. more than 50% of all imi were caused by non-aureus ...200717931457
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