Efficacy evaluation of new teat dip formulation [cyteal] for control of bovine mastitis under experimental and field conditions

ABSTRACT

The germicidal activity of commercial teat dip formulation [cyteal] [containing 0.1 g hexamidine, 0.5 ml chlorhexidine digluconate and 0.3 g chlorocresol] was tested in vitro against Staphylococcus aureus, Streptococcus and Corynebacterium bovis field strains isolated from a dairy herd of 78 lactating cows. It was revealed that concentration of 0.5% tested compound was effective against the isolated organisms. A natural exposure study was conducted for 6 months in dairy herd to determine the efficacy of cyteal as post-milking teat antiseptic for the prevention of the new intramammary infections. There were 7.4% new intramammary infections on the dipped group and 21.6 on the control group [65.7% reduction]. The teat dip was effective in preventing new infections with Staphylococci, Strept. agalactiae, Coryne. bovis but did not appear to prevent new infection with coliforms. The percentage of infected quarters on the dipped group was reduced from an initial [35.1%] to [22.2%] at the end of the study whereas the incidence in the control quarters increased from 23.6% to 35.8% at the end of the study