Eficácia do florfenicol no tratamento de pododermatite infecciosa por Fusobacterium necrophorum em ovelhas
Abstract
This study aims to compare the dose of 20 and 30 mg/kg of florfenicol, intravenously (IV) and intramuscularly (IM) in sheep. The Monte Carlo simulation was performed using the area under the curve (AUC) data obtained from a previously published study. AUC and the minimum inhibitory concentration (MIC) were evaluated to determine the efficacy rates of florfenicol. At dose of 20 mg/kg IV, florfenicol demonstrated 100, 93 and 0% eradication for MICs of 0.5, 1 and above 1 µg/mL, respectively. The bacteriostatic effect was 99 and 90% for MICs of 4 and 2 µg/mL, while the bactericidal effect was 14% for MIC of 2 µg/mL. The 30 mg/Kg IV dose, demonstrated 100% eradication for MIC 1 µg/mL and 100% bactericidal effect for MIC 2 µg/mL. The bacteriostatic effect remained at 100% for MIC 4 µg/mL. The doses of 20 and 30 mg/kg IM, showed 100% eradication for MIC of 1 µg/mL and 0% for higher MIC. The bacteriostatic effect remained at 100% for MIC 4 µg/mL for both doses. This study demonstrated that the doses of 20 and 30 mg/Kg, IV, and IM, show high efficacy rates for Fusobacterium necrophorum strains with MICs up to 1 µg/mL.