Investigation of antimicrobial and antioxidant activity of 4 medicinal plants on 10 standard strains

One of the current problems of treating bacterial infections is increasing their resistance to antibiotics. Antibiotic-resistant bacteria cause significant mortality compared to non-resistant bacteria. Therefore, the use of olive, luffa, and sage medicinal plants, due to their anti-inflammatory and antimicrobial properties against 10 human pathogens, was the target of this research. For this purpose, a completely random experiment was conducted in three replications. Traits such as phenol, flavonoid, antioxidant and the diameter of the growth zone were measured. Data analysis was done using Statistix10 software and charts using Excel software. The highest amount of flavonoids (398.02 micrograms per gram of dry matter) was found in olive fruit and the lowest amount (255.78 micrograms per gram of dry matter) was obtained in sage leaves. Methanolic extract of olive leaf with an average diameter of 8 mm of non-growth zone had the greatest effect on inhibiting the growth of Hafnia alvei.  Methanolic extract of sage leaves with an average diameter of 14 mm of non-growth zonehad the greatest effect on inhibiting the growth of Staphylococcus aureus. Methanolic extract of luffa seed with an average diameter of 12 mm of non-growth zone had the greatest effect on inhibiting the growth of Pseudomonas aeruginosa. Methanolic extract of olive fruit with an average diameter of 18 mm of non-growth zone had the greatest effect on inhibiting the growth of Bacillus cereus. The results of the present research showed that Luffa, olive and sage plants and even their different tissues were effective in treating some pathogenic bacteria such as Hafnia alevi, Staphylococcus aureus, Pseudomonas aeruginosa and the growth of Bacillus cereus. Also, it is recommended to conduct more research on various compounds of these plant extracts by extracting the effective ingredients of this plant extract and other plants.