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Journal of Dairy Science Vol. 83 No. 12 2975-2979
© 2000 by American Dairy Science Association ®
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Efficacies of Chlorine Dioxide and Iodophor Teat Dips During Experimental Challenge with Staphylococcus aureus and Streptococcus agalactiae

R. L. Boddie 1, S. C. Nickerson 1, and R. W. Adkinson 2

1 Mastitis Research Laboratory, Hill Farm Research Station, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Homer 71040
2 Department of Dairy Science, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Baton Rouge 70803

We tested two postmilking teat dips for efficacy against Staphylococcus aureus and Streptococcus agalactiae using experimental challenge procedures recommended by the National Mastitis Council. The chlorine dioxide teat dip that contained 0.7% sodium chlorite reduced the number of new intramammary infections (IMI) caused by Staph. aureus by 86.6% and reduced new IMI caused by Strep. agalactiae by 88.4%. The 0.5% iodophor teat dip reduced the number of new IMI caused by Staph. aureus by 92.9% and reduced the number of new IMI caused by Strep. agalactiae by 43.4%. Teat skin and teat end conditions were evaluated before and after the study, and no deleterious effects were noted among dipped quarters compared with undipped control quarters for either teat dip.

Key Words: chlorine dioxide • Staphylococcus aureus • Streptococcus agalactiae • teat dip

Submitted on May 15, 2000
Accepted on August 22, 2000






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