A 1.0% iodophore teat disinfectant (Full-Bac) was evaluated in comparison with a positive control (Bovadine), a commercially available 1.0% iodophore teat disinfectant. The study was conducted under conditions of experimental challenge, following the guidelines recommended by the National Mastitis Council. The test product and a positive control were compared in 41 cows, with 82 teats receiving each product at milking, during a 10-wk study period. There were no differences between the test product and the positive control in new intramammary infections due to Staphylococcus aureus, which averaged 13.4% in each of the 2 treatment groups. Additionally, no statistical difference was seen between the test product and positive control in new intramammary infections by Streptococcus agalactiae, which averaged 8.5 and 6.1% for the Full-Bac and Bovadine groups, respectively. Teat skin and teat end condition scores were statistically evaluated at wk 1, 5, and 9 of the study, and no significant differences were observed between the treatment groups. The test teat disinfectant provided similar germicidal activity to that of the positive control teat disinfectant with no adverse effects on teat skin or teat end condition during the warm-season study period.
Subclinical ketosis causes significant economic loss to producer by decreasing milk production and increasing risk of periparturient disease. The dairy industry needs a cowside test to monitor periparturient dairy cattle for subclinical ketosis. The objective of this study was to determine the sensitivity, specificity and predictive values of the semi-qualitative Keto-Test in periparturient dairy cattle. This test was previously evaluated (Geishauser et al, J Dairy Sci, 2000) and shown to have a sensitivity and specificity of 80% and 76%, respectively, using a cut-point of 100 μmol/L betahydroxybutyrate (BHBA) or greater as a positive. However, in that evaluation tests were not performed prior to parturition or in the immediate periparturient period.
Although coliform mastitis vaccine programs are widely implemented and relatively successful, several questions remain unanswered regarding proper administration schedule. In a comparison of two vaccination protocols, effects on dry matter feed intake (DMI), daily milk production and milk bacteriological status of fresh cows were analyzed.
Although coliform mastitis immunization programs are widely implemented, several questions concerning the proper administration schedule remain unanswered. Thus, a comparison of two vaccination protocols was conducted to determine the effects on immune response, milk production, milk bacteriological status and dry matter intake (DMI).
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