ABSTRACT
The castor plant is a robust perennial shrub of Euphorbiacaea family. The seeds are documented to have an antibacterial profile against some bacterial organisms such as Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Klebsiella pneumoniae, Proteus vulgaris, and Streptococcus pyogenes. This study was carried out to ascertain antimicrobial properties inherent in the extracts (aqueous, methanolic and n-hexane) of the castor seed against some test organism which include: Escherichia Coli, Staphylococcus aureus and Klebsiella pneumoniae. This was carried out using the disk diffusion method to ascertain the antibacterial activity of the castor seed extract against these three organisms using Mueller-Hinton agar. All three extracts gave distinct zones of inhibition against these organisms, except Staphylococcus aureus and Klebsiella pneumoniae which were resistant at 50mg/ml concentration of the aqueous extracts. This findings makes this seed a potential chemotherapeutic agent useful for man and animals
