Comparatives studies on antibacterial activity of Coriandrum sativum aqueous and alcoholic extracts against some of pathogenic bacteria

Although antibiotics are widely used for the treatment of infectious diseases‚ there may have consequences such as adverse drug reactions and antibiotic resistance. The aim of recent study was to compare the antibacterial activity of aqueous and alcohol extracts of Coriandrum sativum on Staphylococcus aureus, Listeria monocytogenes, Salmonella typhimurium and Escherichia coli. The antibacterial properties of the extracts were assayed using well diffusion and Microtitr plate (for determining the MIC and MBC). Results of well diffusion method showed that S. aureus and L. monocytogenes were sensitive but E. coli and S. typhimurium were found resistant against both aqueous and alcohol extracts. The MIC and MBC for S. aureus was estimated at 6.25 µg/ml and 12.5 µg/ml, respectively. It was concluded that aqueous and alcohol extracts of Coriandrum sativum were effective on Gram-positive bacteria, however they were ineffective against Gram-negative strains used in this experiment.