The comparative study of antimicrobial activities of the composite mixture of Gongronema latifolium and Pterocarpus Soyauxii on Bacillus cereusand Escherichia coli

The antimicrobial activity of the composite mixture of crude, cold water, hot water, and hot ethanolic extracts of the leaves of Gongronem latifolium and Pterocarpus soyauxii on Bacillus cereus and Escherichia coli were comparatively studied.

Extract of the two plants show no activity against the test organisms except for the hot ethanolic extracts which were active against the organisms with mean maximum inhibitory zone of 4.67mm and 2mm at 80% concentration of Pterocarpus soyauxii on Bacillus cereus sand Echerichia coli respectively while 1.8mm and 2mm at 100% concentration of Gongrenema latifoium on both Bacillus cereus and Escherichia coli. The activities of the composite mixture of the plants at these concentrations were 3.17mm for bacillus cereus and 1.83mm for Escherichia coli. The results obtained indicated that the composite mixture of the plants were antagonistic on Bacillus cereus while showing indifference on Escherichia coli.