Abstract
This study was designed to evaluate the antimicrobial potentials of ethanol and aqueous extracts of Moringa oleifera against microorganisms isolated from beef offal. The beef offal samples (liver, kidney and intestine) were purchased from an abattoir in Port Harcourt while the Moringa oleifera leaves were harvested from the farm, Rivers State University of Science a nd T echnology, Port Harcourt. Plating was done using the spread plate method while test for inhibitory potential was done using disc diffusion method. Six species of bacteria ( Bacillus cereus, Staphylococcus aureus, Escherichia coli, Streptocccus spp , Pseudomo nas aeruginosa and Proteus vulgaris ) and two mould species ( Rhizopus spp and Mucor spp ) were identified. Antimicrobial potentials of the ethanol and aqueous extracts of M . oleifera on isolates were tested at various concentrations (50, 100, 200 and 400 mgm l - 1 ). Ethanol extract of M. oleifera showed strong antimicrobial activity and concentration dependent inhibitory effect on beef offal isolates while the aqueous extract was ineffective on test bacteria isolates. At a concentration of 400 mg/ml, zones of in hibition recorded were highest with ethanol extracts for Staphylococcus aureus (14.00 ±0.6 mm), Bacillus cereus (13.00± 0.1 mm) and
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