Abstract
Data on 297 cows which received complete dry cow treatment and subsequently calved were used in this study. At drying-off, 7.7% of the quarters were infected. Among the mastitic pathogens, Staphylococcus aureus was isolated in 75% of the infected quarters. About 92% of the infected quarters were cured with dry cow treatment and 6% of the quarters had new infections during dry period. It appears that dry cow treatment is an effective means of eliminating Staphylococcus aureus infections. Key words: Mastitis, dry cow treatment, dairy cattle

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