Analysis of antimicrobial efficacy of plant extracts from Rosmarinus officinalis L., Salvia officinalis L. and Coriandrum sativum L. Rafaela Rogério Floriano de Sousa, Marcelo Rogério da Silva, Priscila Reina Siliano

Abstract

Bacterial resistance is a serious problem, caused mainly by excessive consumption of antibiotics, thus selecting genetically more resistant bacteria. Due to this constant change, new drugs must be developed and some plants must be explored to test their antimicrobial capabilities. The species Rosmarinus officinalis L. (rosemary), Salvia officinalis L. (sage) and Coriandrum sativum L. (cilantro), were subjected to processes to obtain their pure extracts, diluted in concentrations of 0.05; 0.15; 0.20 and 0.30g/ml, and tests were carried out using the macrodilution method with 10 different bacteria: Klebsiella pneumoniae, Enterobacter aerogenes, Serratia marcescens, Streptococcus pyogenes, Proteus mirabilis, Bacillus subtilis, Escherichia coli, Proteus vulgaris, Staphylococcus aureus and Pseudomonas aeruginosa. The extract of Rosmarinus officinalis L. at 0.30g/ml inhibited 7 species of bacteria, Salvia officinalis L. at 0.20g/ml inhibited 9 species of bacteria and the extract of Coriandrum sativum L. 0.30g/ml was effective against all species of bacteria tested and the most efficient compared to the other three extracts evaluated.