This study evaluates the antimicrobial activity of tannins observed on the stem bark of Piptadenia stipulacea (Benth) on Staphylococcus aureus strains of bovine origin. In vitro antimicrobial activity of the tannin was evaluated by determining the minimum inhibitory concentration (MIC). To determine the MIC, tannins were serially dissolved in distilled water at concentrations ranging between 500 mg/mL and 0.976...