Mohammad S, Mohammadpour G and Savadkoohi P
Medicinal plants are used for treatment of many diseases all around the world. Besides, some of medicines are expensive or not readily available. These situations urgently forced scientists for searching new inexpensive drugs with prolonged periods before resistance set in. Because of the side effects and the resistance that pathogenic microorganisms build against the common antibiotics, much recent attention has been m to extracts and biologically active compounds which are isolated from plants in herbal medicine. This study has carried out in order to clarify antibacterial efficacy of Euphorbia helioscopia in Sari, Iran in 2016. Gram negative (Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae) and Gram positive (Staphylococcus aureus, Bacillus cereus) bacteria were used in this study. The results showed that the ethanolic extract of Euphorbia helioscopia had a promising antibacterial effect. In the present study, the best antibacterial efficacy of Euphorbia helioscopia was on Staphylococcus aureus.