Journal of The Faculty of Science and Technology

Omdurman Islamic University

The chloroformic , methanolic and equesus extracts of the seeds and oil seeds  and oil seeds of Cucurbita maxima (Cucubitaceae) and fruits and oil fruits of Boswellia carterii (Burseracae) were screened for their antimicrobial activity using the cup – plate agar diffusion method. They were tested against four bacteria , two Gram – positive bacteria (Bacillus subtilis and Staphylococcus aureus) and two – negative bacteria (Escherichia coli and Klebsiella pneumoniae.)  and two fungi (Aspergillus niger and Candida albicans).

The susceptibility of the microorganisms to these extracts was compared with each other and with selected antibiotics. the antimicrobial  activities of these plants were discussed .

Key words: Antimicrobial activity , Gram – positive , Gram negative , fungi , Cucurbita maxima and Boswellia caterii