Pilot study--parenteral treatment of recently acquired subclinical mastitis during lactation.

Objective: To conduct a pilot study to investigate the effect of parenteral antibiotic treatment with penethamate hydriodide on recently acquired sub-clinical mastitis.

Design: Sixty-nine cows from five Western Victorian dairy farms were enrolled in a pilot trial. Cows that had an Individual Cow Cell Count (ICCC) of greater than 250,000 cells per mL in their milk at their first or second herd test were enrolled in the trial if they were in their first lactation, or if they had a history of ICCCs below 250,000 cells per mL at all herd tests during the previous lactation.

A comparative efficacy trial between cefuroxime and cloxacillin as intramammary treatments for clinical mastitis in lactating cows on commercial dairy farms.

Aims: To assess the efficacy of a commercial intramammary preparation containing cefuroxime as a treatment for clinical mastitis in lactating dairy cows.

Methods: Clinical mastitis cases (n=440) were identified during early to mid lactation on 36 seasonally-calving commercial dairy herds in south-western Victoria, Australia, that ranged in size from 140 to 550 cows. A milk sample for bacterial culture was collected from each affected quarter prior to treatment.

Compliance of Victorian dairy farmers with current calf rearing recommendations for control of Johne's disease.

Questionnaires were posted to 800 randomly selected registered Victorian dairy farmers in 1996. Five hundred and thirty-four responses were received and analysed. Johne's disease (JD) had been diagnosed on the farm of 13.