The Effect of different crude methanolic extracts against some gram negative pathogenic bacteria

Abstract

This present study was conducted to evaluated the antibacterial activity of crude extracts (Methanolic) of punica granatum peel, Menthe longifolia and Olea eurpeae leaves against some gram negative bacteria like Pseudomonas aerugenosa, Serratia marcesens, Escherichia coli, Proteus vulgaris, Klebsiella pnemunoniae. The Agar-well diffusion was used to know the ability of inhibititory of crude extracts against bacteria. Results showed different susceptibility response of bacteria under study. It was observed that Pseudomonas aerugenosa the most susceptible to Methanolic extracts to all plants in (25, 50) mg/ml-1 concentrate. While the bacterial strains shown no responding against mint and pomegranate extracts in 10 mg/ml-1 except Pseudomonas aerugenosa and Escherichia coli, was inhibited with Olive extracts only. That ability to inhabitation less in concentrate 10 mg ml-1.