Good teat disinfectants should be effective against the major mastitis pathogens (especially the contagious pathogens Staphylococcus aureus and Streptococcus agalactiae), be economical and easy to apply, and should maintain or promote good skin condition. Both traditional and barrier types of disinfectants are available.
Whatever type is chosen, the product should have documented efficacy against all the major contagious mastitis pathogens. Use only products that are: 1) listed with the Food and Drug Administration (FDA) and 2) shown to effectively reduce infection rate by controlled research. The FDA regulates teat disinfectants as over-the-counter drugs. However, the FDA does not require proof of effectiveness for labeling. Specific teat disinfectants have been studied in controlled research, but imitations are readily available and minor formulation changes often reduce effectiveness. Dairy producers should request information from the manufacturer on compliance with FDA regulations and results of controlled research studies showing efficacy.
Another source of information concerning teat disinfectant efficacy is the Summary of Peer-Reviewed Publications on Efficacy of Premilking and Postmilking Teat Disinfectants Published Since 1980, made available and updated annually by the National Mastitis Council. The summary of peer-reviewed publications is not exhaustive, and new findings may be reported between publications of the list. Source: www.nmconline.org/dipfacts.htm
It is excellent advice for dairy producers to request evidence of effectiveness in reducing mastitis in controlled studies for any formulation of teat dip they consider using. It is highly preferable to see a comparison with another type of teat dip as opposed to a comparison with no dip at all.
Dave Wilson, Dairy Extension Veterinarian, Utah State University
