Antimicrobial Activity of Psidium guajava, Schoenanthus cymbopogon, Solenostemma argel, Hyphaene thebaica and Petroselinum crispum
Inshirah MH, Elmugdad AA, Mohammed MA
Psidium guajava, Schoenanthus cymbopogone, Solenostemma argel, Hyphaene thebaica and Petroselinum crispum plants are traditionally used for medicinal purposes in Sudan. The present study was designed to check in vitro efficacy of these plants against selected bacterial and fungal strains. PetroLeum ether, ethyl acetate, acetone and ethanol extract of these plants were used for antimicrobial screening. Antibacterial activity was tested against four standard bacteria i.e.: two Gram positive (Bacillus subtilis and Staphylococcus aureus), two Gram negative (Escherichia coli and Pseudomonas aeruginosa). Antifungal activity was tested against two standard fungi species i.e. Aspergillus niger and Candida albicans using the Agar plate diffusion method was used for both. The ethanolic extract showed greater bacterial activity as compared with other extract may due to the polarity. exhibited inhibitory effects against most of the tested organisms with the zone of inhibition ranging from (11-23.5 mm) in length. All extract of S. argel showed excellent inhibitory activities (12 -23.5mm) and obtained remarkable inhibitory (23.5, 22mm) against Pseudomonas aeruginosa and Escherichia coli respectively. Petroselinum crispum showed good inhibitory activities (23mm) against E. coli. The other extract of plants showed modrate inhibitory ranging between (12 -17 mm) against all bacteria. In case of fungi highest inhibition was observed against Aspergillus niger (23 mm) from S.cymbopogone and S. argel followed by P. guajava (22mm), while S. argel showed highest inhibition (21mm) against Candida albicans. However S. cymbopogone showed no zone of inhibition was observed in Aspergillus niger and Candida albicans except with petroieum ether extract. In conclusion: These finding provide scientific evidence of traditional use of medicinal plants and also indicate the potential of these plants for the development of antimicrobial agents.