Bovine mastitis caused by Staphylococcus aureus: susceptibility to antimicrobial drugs and the alcoholic extract of propolis

Abstract

Mastitis is one of the factors that cause damage to production and processing milk. The aim of this study was to isolate the species Staphylococcus aureus from milk samples from 63 animals with mastitis, and check your profile antimicrobial sensitivity to antibiotics and the extract of propolis at 30%. Of 63 animals evaluated, 38 (60.32%) showed growth of Staphylococcus aureus. As for testing of antimicrobial sensitivity test, the most efficient antibiotics were gentamicin (10 ug), cephalexin (30 ug) and ciprofloxacin (10 ug) with 100% efficiency, followed by norfloxacin (94.6%). There were 35 (92.10%) animals with sensitivity to the extract of propolis 30% with inhibition diameters between 6 and 18 mm in 40 uL and 60 uL. The investigation of in vitro antimicrobial susceptibility to Staphylococcus aureus isolated from bovine mastitis is extremely valuable to their treatment. The use of extract of propolis 30% in the antimicrobial therapy may be an alternative, because its components gives it excellent value in natural medicine and preventive. Keywords: Antibiotic, clinical mastitis, subclinical mastitis, resistance.