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Article: Influence of dry period bacterial intramammary infection on clinical mastitis in dairy cows
- Article from:
- Journal of Dairy Science
- Article date:
- October 1, 2002
- Author:
CopyrightCopyright American Dairy Science Association Oct 2002. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
Milk samples were taken from 1920 quarters (480 cows, six herds) on four occasions to examine the relationship between quarter level intramammary infection (IMI) during the dry period and clinical mastitis in the next lactation. All quarters were sampled at drying off and within 1 wk of calving, and two quarters from each cow were sampled both 0 to 7 and 8 to 14 d before calving. Milk samples were collected from all cases of clinical mastitis during the following lactation. Logistic regression models were developed to investigate the associations between IMI present during the sampling period and clinical mastitis. The probability of a quarter succumbing to clinical mastitis ...
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