Antimicrobial Effect of Hydroalcoholic Extracts of Oak Jaft (Quercus Persica) and Echium Amoenum on Shigella Flexneri

Abstract

Background and Objectives: Today, because of the spread of drug resistance and the prevalence of infectious diseases, the use of medicinal plants has increased. So, in this study, the antibacterial effect of hydroalcoholic extract of Oak jaft and Echium amoenum was investigated on Shigella flexneri. Methods: In this study, hydroalcoholic extracts were extracted by maceration method and concentrated by rotary evaporator then dried immediately. Next, the antimicrobial effect of different dilutions of extracts on Shigella flexneri was investigated by disk diffusion and micro broth dilution methods and compared with two antibiotics, ciprofloxacin and trimethoprim-sulfamethoxazole. Results: The results showed that in proportion to the increase in the concentration of oak jaft extract, its antibacterial effect on Shigella flexneri also increased and 3.9 and 7.8 mg/ml of the extract were obtained by MIC and MBC dilution micro broth method, respectively. In the case of Echium amoenum extract, bacteria were grown at all dilutions (except the main stock of the extract (250 mg/ml)) and the extract had no antimicrobial effect on Shigella flexneri. Conclusion: According to the results of this study, oak jaft extract had a good inhibitory effect on Shigella flexneri and in comparison, with ciprofloxacin antibiotic, a similar inhibitory effect was observed and in comparison, with trimethoprim sulfamethoxazole, more inhibitory effect was observed.

Keywords

• drug resistance
• shigella flexneri
• plant extracts
• antimicrobial properties