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Article: Systematic Clinical Examinations for Identification of Latent Udder Health Types in Danish Dairy Herds
- Article from:
- Journal of Dairy Science
- Article date:
- May 1, 2004
- Author:
CopyrightCopyright American Dairy Science Association May 2004. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
A cross-sectional study was conducted to explore the applicability of systematic clinical examinations of udders as an additional tool for the evaluation of udder health status on dairy farms. During 2000, each of the 16 dairy farms was visited 5 times; 20 cows per farm were chosen at random at each visit for clinical udder examination immediately after milking. The clinical examination included both pathological and morphological variables. One examination per cow was included in the analysis (n = 707 cows). Principal component analysis (PCA) was performed in 3 steps. First, 19 variables characterizing udder and teats were analyzed (PCA 1). Second, the variables parity and stage ...