title: Evaluation of a chlorous acid-chlorine dioxide teat dip under experimental and natural exposure conditions.
abstract: A postmilking teat dip containing chlorous acid-chlorine dioxide was evaluated by experimental challenge and in two herds under natural exposure. The test product had an efficacy of 78.9% against Staphylococcus aureus and 52.5% against Streptococcus agalactiae in the experimental challenge trial. The product was compared with a 1% iodine product in a 15-mo natural exposure study. Post-dipping with chlorous acid-chlorine dioxide reduced incidence of udder infection by major mastitis pathogens 36.1% when data were combined from the two herds. The 1% iodine and the chlorous acid-chlorine dioxide products were not equivalent for major mastitis pathogens; the test product was more effective. Incidence of udder infection by environmental mastitis pathogens was reduced 36.8% in both herds combined. Efficacy of the two teat dips was equivalent for environmental pathogens.
authors.affiliation: Department of Animal Sciences, University of Vermont, Burlington 05405.
authors.forename: P A
authors.initials: PA
authors.lastname: Drechsler
authors.forename: E E
authors.initials: EE
authors.lastname: Wildman
authors.forename: J W
authors.initials: JW
authors.lastname: Pankey
mesh_terms: D000818:Animals; D002417:Cattle; D002712:Chlorides / Q000627:therapeutic use*; D002713:Chlorine / Q000627:therapeutic use*; D017606:Chlorine Compounds; D004202:Disinfectants / Q000627:therapeutic use*; D004338:Drug Combinations; D005260:Female; D008414:Mastitis, Bovine / Q000517:prevention & control*; D010087:Oxides / Q000627:therapeutic use*; D013203:Staphylococcal Infections / Q000517:prevention & control / Q000662:veterinary; D013211:Staphylococcus aureus / Q000187:drug effects; D013290:Streptococcal Infections / Q000517:prevention & control / Q000662:veterinary; D013292:Streptococcus agalactiae / Q000187:drug effects
chemical_list: D002712:Chlorides; D017606:Chlorine Compounds; D004202:Disinfectants; D004338:Drug Combinations; D010087:Oxides; D002713:Chlorine; C063160:chlorous acid; C025109:chlorine dioxide