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Journal of Dairy Science Vol. 77 No. 10 3192-3197
© 1994 by American Dairy Science Association ®
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Efficacy of Two Barrier Teat Dips Containing Chlorous Acid Germicides Against Experimental Challenge with Staphylococcus aureus and Streptococcus agalactiae

R. L. Boddie 1, S. C. Nickerson 1, and G. K. Kemp 2

1 Hill Farm Research Station, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Route 1, Box 10, Homer 71040
2 Alcide Corp., One Willard Road, Norwalk, CT 06851

Two postmilking teat dips were rested for efficacy against Staphylococcus aureus and Streptococcus agalactiae using experimental challenge procedures recommended by the National Mastitis Council. Both dips contained chlorous acid as the primary germicidal agent and lactic acid or mandelic acid as the chlorous acid activator. The dip activated with mandelic acid significantly reduced new IMI by Staph. aureus and Strep. agalactiae. The IMI rate was reduced 68.7% for Staph. aureus and 56.4% for Strep. agalactiae. The dip activated with lactic acid significantly reduced new Staph. aureus IMI by 69.3% but did not significantly reduce new Strep. agalactiae IMI (35.2% reduction) through the full 1 I-wk study period. Teat skin condition did not change from pretrial status after using either teat dip during the study.

Key Words: barrier teat dip • chlorous acid • Staphylococcus aureus • Streptococcus agalactiae

Submitted on April 15, 1994
Accepted on June 24, 1994




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Copyright © 1994 by the American Dairy Science Association ®.