Abstract
ABSTRACT The objective of this study, conducted at the University of Kentucky Cold-stream Dairy, was to determine whether increased alley-floor scraping frequency decreased environmental mastitis-causing pathogen counts. Sixteen Holstein cows were monitored during two 3-wk treatments: removing manure from the alley floors once (1 ×) or twice daily (2 ×) by a skid steer equipped with a tire scraper. Bedding, milk, and teat-end swab samples were collected twice weekly to observe changes in streptococci, Klebsiella spp., coliform, and Escherichia coli counts and SCS. Increasing alley-floor scraping frequency to 2 × decreased all bedding pathogen counts (P = 0.01); teat-end coliform, E. coli, and streptococci counts (P
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