Efficacy of two barrier teat dips containing chlorous acid germicides against experimental challenge with Staphylococcus aureus and Streptococcus agalactiae.
Two postmilking teat dips were tested 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 11-wk study period. Teat skin condition did not change from pretrial status after using either teat dip during the study.
Hill Farm Research Station, Louisiana Agriculture Experiment Station, Louisiana State University Agricultural Center, Homer 71040.
R L
RL
Boddie
S C
SC
Nickerson
G K
GK
Kemp
D000818:Animals; D000891:Anti-Infective Agents, Local / Q000494:pharmacology*; D002417:Cattle; D002712:Chlorides / Q000494:pharmacology*; D005260:Female; D007773:Lactates; D019344:Lactic Acid; D008321:Mammary Glands, Animal / Q000382:microbiology*; D008333:Mandelic Acids; D008414:Mastitis, Bovine / Q000517:prevention & control*; D012867:Skin / Q000187:drug effects; D013211:Staphylococcus aureus / Q000187:drug effects*; D013223:Statistics as Topic; D013292:Streptococcus agalactiae / Q000187:drug effects*
D000891:Anti-Infective Agents, Local; D002712:Chlorides; D007773:Lactates; D008333:Mandelic Acids; D019344:Lactic Acid; C063160:chlorous acid; C037938:mandelic acid