title: Hygiene in the prevention of udder infections. V. Efficacy of teat dips under experimental exposure to mastitis pathogens.
abstract: Efficacy (reduction of new intramammary infections) was determined against Staphylococcus aureus in 14 trials and against Streptococcus agalactiae in 5 trials. Against Staphylococcus aureus seven 1% iodophor products had an average efficacy of 89.9% while three .5% iodophor products averaged 76.4%. A solution of sodium dichloro-s-triazenetrione reduced infections 79.0% and 2% dodecyl benzene sulfonic acid was 50.4% effective. Efficacies of two quaternary ammonium products at .18 and .5% were 84.8 and 60.9%. A placebo vehicle and .15 M saline as teat dips reduced infections 8.9 and 9.2%. Infection rates with Streptococcus agalactiae were low; efficacy ranged from 50.5 to 100.0%, average 65.6%. The model of experimental exposure provided a better estimate of effectiveness of a teat dip than would be possible under conditions of most commercial dairying.
mesh_terms: D000818:Animals; D000891:Anti-Infective Agents, Local / Q000627:therapeutic use*; D002417:Cattle; D002710:Chlorhexidine / Q000627:therapeutic use; D004202:Disinfectants / Q000627:therapeutic use*; D005260:Female; D007466:Iodophors / Q000627:therapeutic use; D008414:Mastitis, Bovine / Q000517:prevention & control*; D000644:Quaternary Ammonium Compounds / Q000627:therapeutic use; D013203:Staphylococcal Infections / Q000517:prevention & control / Q000662:veterinary*; D013290:Streptococcal Infections / Q000517:prevention & control / Q000662:veterinary*; D013292:Streptococcus agalactiae
chemical_list: D000891:Anti-Infective Agents, Local; D004202:Disinfectants; D007466:Iodophors; D000644:Quaternary Ammonium Compounds; D002710:Chlorhexidine