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Journal of Dairy Science Vol. 72 No. 11 3091-3097
© 1989 by American Dairy Science Association ®
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Prevention of Bovine Mastitis by a Postmilking Teat Disinfectant Containing Chlorous Acid and Chlorine Dioxide in a Soluble Polymer Gel

S. P. Oliver1, S. H. King, P. M. Torre, E. P. Shull, H. H. Dowlen, M. J. Lewis and L. M. Sordillo2

Department of Animal Science, Institute of Agriculture, University of Tennessee, Knoxville 37901-1071

ABSTRACT

A natural exposure study was conducted in a herd of 150 lactating dairy cows for 18 mo to determine the effectiveness of chlorous acid and chlorine dioxide in a soluble polymer gel as a postmilking teat disinfectant for the prevention of bovine mastitis. Right quarters of cows were dipped in the experimental teat dip after milking machine removal. Left quarters were not dipped and served as within-cow negative controls. The experimental teat dip reduced Staphylococcus aureus infections 67.4%, Streptococcus dysgalactiae infections 63.8%, and Streptococcus uberis infections 27.8%. Overall efficacy of the chlorous acid and chlorine dioxide teat dip against major mastitis pathogens was 52.2%. The experimental teat dip reduced Corynebacterium bovis infections and coagulase -negative staphylococcal infections also by 45.8 and 38.7%, respectively. Overall efficacy against minor mastitis pathogens was 43.4%. Under conditions of this trial, the experimental teat dip containing chlorous acid and chlorine dioxide was effective in preventing new intramammary infections against a variety of mastitis pathogens.

FOOTNOTES

1 Send reprint requests to S. P. Oliver.

2 Current address: Veterinary Infectious Disease Organization, University of Saskatchewan, Saskatoon Canada S7N 0W0.






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Copyright © 1989 by the American Dairy Science Association ®.