Antibacterial activity of selected concentration of Salicylic acid against Escherichia coli and Staphylococcus aureus

Abstract

Biological tests were performed for different concentrations of Salicylic acid on Staphylococcus aureus& Escherichia coli bacteria, classified as antibiotic resistance. To find out the sensitivity of bacteria to those concentrations, as the results showed that the biological effect of Salicylic acid is non-existent on both types of bacteria at concentrations less than 10 µg/ml. The effect of Salicylic acid increases directly with the increase in concentrations, the effect of Salicylic acid on Gram-positive bacteria represented in Staphylococcus aureus is higher than its effect on Gram-negative bacteria, which represented in Escherichia coli, at all Salicylic acid concentrations used in this study. Key words: salicylic acid - Biological effect - Staphylococcus aureus Escherichia coli - inhibition zone.