In this study, clinical isolate of Staphylococcus aureus was subjected to susceptibility tests against commercially available antibiotics and Ocimum gratissimum (scent leaf) leaf extracts. disc diffusion nmethod was adopted for the antibiotics test while agar well diffusion technique was employed for the antimicrobial screening of the leaf extracts. The result shows that the organism was sensitive to Gentamycin, Zinnacef, Ciprofloxacin and Streptomycin representing 40 % of the antibiotics while showing outright resistance to Ampiclox, Amoxicillin and Erythromycin (30 %) and intermediate results for the rest. Also, the cold water extract of O. gratissimum did not show any activity against the bacterium. However, both hot water extract and ethanol extract of the plant had varying degree of activity against the organism with ethanol extract recording a zone of inhibition of 25.33 mm compared with 32.00 mm recorded for Gentamycin. Furthermore, the minimum inhibitory concentration recorded ofr the extract against the organism were 10 mg/ml and 2.5 mg/ml respectively for hot water and ethanol extracts. These results indicate that ethanol extract of O. gratissimum leaf is very effective against Staphylococcus aureus and could be used as potential source of natural product for the treatment of infections caused by the organism especially the antibiotic resistant strains.
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