Essential oils have been used for centuries ago in traditional medicine, for industrial applications and as food preservatives due to their antimicrobial activity. The antibacterial activity of essential oil of cumin, black seedss, marjoram, rosemary and sage were tested against Gram-negative bacteria (_Escherichia coli O157 :H7__,__ Klebsiella pneumonia, __Proteus vulgaris, __Pseudomonas aeruginosa, Salmonella typh__i _and_ Serratia marcescens_) and Gram-positive bacteria ... إقراء المزيد