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Journal of Dairy Science Vol. 73 No. 10 2790-2793
© 1990 by American Dairy Science Association ®
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Efficacy of Two Iodophor Postmilking Teat Germicides Against Streptococcus agalactiae

R. L. Boddie 1 and S. C. Nickerson 1

1 Hill Farm Research Station, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Route 1, Box 10, Homer 71040

Two iodophor teat germicides containing .1% and .5% titratable iodine were subjected to experimental challenge with Streptococcus agalactiae in a 131-cow research herd. Both germicides reduced the number of new infections with challenge organisms during a 5-wk study. The .1% iodophor reduced the new infection rate 60.7%, and the .5% iodophor reduced the new infection rate 61.5%. Teat skin irritation and other teat abnormalities were not observed.

Key Words: teat germicide • Streptococcus agalactiae • efficacy

Submitted on March 16, 1990
Accepted on May 29, 1990






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