Antimicrobial Activity of Ethnobotanical Plant Psidium Guajava

The present work demonstrates the antimicrobial potential of Psidium guajava leaves extract by using various solvents. The results indicate that water and acetone are better than methanol and ether for the extraction of the antibacterial properties of guava. The results also indicate that the plant extracts have antibacterial effect on both Gram positive and Gram-negative bacteria, that is, can be used as broad spectrum antibacterial compounds. The observed inhibition of Gram-positive bacteria Staphylococcus aureus and Gram negative bacteria E.coli suggests that guava possesses compounds containing antibacterial properties that can effectively suppress the growth when extracted using acetone and water as solvent. Comparisons with related data from the literature indicate that according to the different methodologies of studies on antibacterial activity, the most diverse outcomes can be obtained. This study provides scientific insight to further determine the antimicrobial principles and investigate other pharmacological properties of guava. On the basis of the present finding, P. guajava leaves possess capabilities of being a good candidate in the search for a natural antimicrobial agent against infections and/or diseases caused by S. aureus and E.coli.