In-vitro efficacy analysis of aqueous extract of Zingiber officinale, Boswellia serrata and Coleus aromaticus against pathogenic Staphylococcus aureus

In the present study aqueous extracts of Zingiber officinale, Boswellia serrata and Coleus aromaticus were investigated for the presence of various phytochemicals. Their antioxidant and antimicrobial activities were also determined against Staphylococcus aureus. Phytochemical analyses revealed the presence of phenols, flavonoids, terpenoids, proteins, carbohydrates and saponins in different extracts. The susceptibility of bacterial strain against the aqueous extracts was determined using the well diffusion method. The zone of inhibition of different concentrations of the aqueous extracts against microbe was found to be in the range of 7-27 mm. The results showed that the aqueous extract taken in the concentrations of 50?g/ml (Coleus aromaticus), 100?g/ml (Boswellia serrata) and 200?g/ml (Zingiber officinale) were effective in antimicrobial activity against the test pathogen. Highest antibacterial activity was observed with Coleus aromaticus extract with 27 mm diameter of zone of inhibition while minimum activity was observed with aqueous extract of Zingiber officinale. The antioxidant activity was revealed by reducing power assay method and showed that aqueous extract of Coleus aromaticus has good reducing power which leads to potential antioxidant activity.