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Journal of Dairy Science Vol. 84 No. 6 1545-1549
© 2001 by American Dairy Science Association ®
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Efficacy of a New Premilking Teat Disinfectant Containing a Phenolic Combination for the Prevention of Mastitis

S. P. Oliver 1, B. E. Gillespie 1, M. J. Lewis 1, S. J. Ivey 1, R. A. Almeida 1, D. A. Luther 1, D. L. Johnson 1, K. C. Lamar 1, H. D. Moorehead 1, and H. H. Dowlen 1

1 Department of Animal Science, Institute of Agriculture, The University of Tennessee, Knoxville 37996

A teat disinfectant containing a phenolic combination was evaluated in a natural exposure study in two dairy research herds. Premilking teat disinfection was compared with a negative control using a split-udder experimental design. In both herds, premilking and postmilking teat disinfections with the phenolic combination were significantly more effective in preventing new intramammary infection (IMI) than was postmilking teat disinfection only. Clinical mastitis and new IMI by Streptococcus uberis, Streptococcus dysgalactiae, Gram-negative pathogens, and coagulase-negative Staphylococcus species were significantly lower in quarters of cows with teats predipped and postdipped than in quarters with teats postdipped only. No chapping or teat skin irritation was observed. Premilking teat disinfection with the phenolic combination in association with good udder preparation and postmilking teat disinfection can further reduce the occurrence of new IMI by numerous mastitis pathogens during lactation.

Key Words: bovine mastitis • premilking teat disinfectant • phenolic combination • environmental mastitis pathogens

Submitted on September 11, 2000
Accepted on January 19, 2001






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