Systemic treatment of subclinical mastitis in lactating cows with penethamate hydriodide.

摘要: A randomized controlled field trial was performed to evaluate the efficacy of a 3-d treatment regimen with i.m. penethamate hydriodide compared no in lactating cows subclinical mastitis. To be included, cow had have 2 somatic cell counts (SCC) 300,000 cells/mL at last 3 monthly controls, 1 or more quarters SCC >250,000 cells/mL, and same bacterial species isolated consecutive samples 4 d apart. total 151 from 92 were monitored for mo following treatment. Quarter milk examined bacteriological cure (BC) 14, 28, 60 after Bacteriological defined as not having quarter taken 14 28 posttreatment before Systemic resulted BC 59.5% 52.2% cows, 16.7 10.9% untreated cows. Somatic count decreased significantly penethamate-treated steadily case transiently when infections persisted. This study confirms that systemic mastitis is effective infected has sustained positive effect on during