TY - JOUR AU - Tesk, A. AU - Freitas, F. AU - Kemper, R. T. AU - Vieira, T. B. PY - 2020/09/01 Y2 - 2024/03/29 TI - Evaluation of antibacterial activity from different Aloe vera (L.) Burm. F. extracts against Staphylococcus aureus strains JF - Scientific Electronic Archives JA - Sci. Electronic Arch VL - 13 IS - 9 SE - Ciências Biológicas DO - 10.36560/13920201190 UR - https://sea.ufr.edu.br/SEA/article/view/1190 SP - 74 - 79 AB - This study aimed to evaluate the susceptibility of <em>Staphylococcus aureus</em> strains isolated from the milk of cows with subclinical mastitis to <em>Aloe vera</em> <em>in natura</em> sap, ethanolic extract and <em>in natura</em> gel. The substances were tested using agar well diffusion and agar disk-diffusion methods. There was no inhibition of bacterial growth in the agar disk-diffusion method. On the other hand, the agar well diffusion method displayed <em>in vitro</em> growth inhibition of <em>S. aureus</em> in ethanolic extract and <em>in natura</em> sap of 91.66% (22/24) and 35.29% (6/17), respectively.  Although the gel showed no effect against the strains tested in both methods, the agar well diffusion method was the most efficient to evaluate the antimicrobial activity of <em>Aloe vera </em>extracts. ER -