Article
Mastitis of periparturient Holstein cattle: a phenotypic and genetic study.
Journal of dairy science - 1 Oct 1995
Detilleux J C, Kehrli M E, Freeman A E, Fox L K, Kelley D H
Abstract excerpt
Environmental and genetic factors affecting somatic cell scores, clinical mastitis, and IMI by minor and major pathogens were studied on 137 periparturient Holstein cows selected for milk production. Environmental effects were obtained by generalized least squares and logistic regression. Genetic parameters were from BLUP and threshold animal models. Lactation number affected the number of quarters with clinical...
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