Screening tests for new teat dips.
Increased use of after-milking teat dips has resulted in the appearance of many new teat dips and a need for methods of evaluation of efficacy. A method was developed for determining the ability of a disinfectant to kill bacteria on the teat ends. Results from several known efficacious products indicated an approximate 95% reduction in bacterial flora. Additional data are presented on some experimental products. This method will provide a measure of effectiveness of a producton teat-skin disinfection. The effect of some changes in the testing procedure on bacterial reduction is demonstrated: 1) Increased times between inoculation and dipping and between dipping and swabbing tended to decrease recoveries on control teats. 2) Saline dips on controls teats provided increased recoveries of test organisms.
D000818:Animals; D002417:Cattle; D004202:Disinfectants; D004353:Drug Evaluation, Preclinical; D005260:Female; D007466:Iodophors; D007774:Lactation; D008321:Mammary Glands, Animal / Q000187:drug effects / Q000382:microbiology*; D011247:Pregnancy; D000644:Quaternary Ammonium Compounds; D012973:Sodium Hypochlorite; D013203:Staphylococcal Infections / Q000517:prevention & control*; D013290:Streptococcal Infections / Q000517:prevention & control*; D013997:Time Factors; D014227:Triazines
D004202:Disinfectants; D007466:Iodophors; D000644:Quaternary Ammonium Compounds; D014227:Triazines; D012973:Sodium Hypochlorite