جستجوی مقالات مرتبط با کلیدواژه "برگ درخت گردو" در نشریات گروه "پزشکی"

Malassezia furfur is the cause of pityriasis versicolor. Phenolic compounds in the walnut leaf have antimicrobial effects. The purpose of this study was to examine the antifungal effects of alcoholic and aqueous extracts of walnut leaf on M. furfur, in vitro. Alcoholic and aqueous extracts of walnut leaf were prepared by simple distillation and Rotary method and then we studied the antifungal effects of these extracts on M. furfur by using disc and Well method, in vitro. Then the minimum inhibitory concentration (MIC) and minimal fungicidal concentration (MFC) were determined. SPSS18 software, two-way ANOVA and Bonferroni test were used for data analysis. The largest growth inhibition zone diameters for water, ethanolic and methanolic extracts were 30, 28.66and 46.33 mm, respectively, that were observed at a concentration of 110 mg/ml. MIC of aqueous extract for M. furfur was 25×103 mg/ml and its MFC was 5×104 mg/ml. The MIC and MFC of walnut leaf ethanolic extract were 6250 and 125×102 mg/ml, respectively. Also MIC and MFC of methanolic extract were 25×103 and 5×103 mg/ml, respectively. Statistical results showed that extracts had a different effect on the diameter of inhibition zones and increased concentration of the extracts led to increased inhibition zone diameters (p<0.05). According to the results of this study, extracts of walnut leaf can be a promising therapy in the future for the treatment of infections caused by M. furfur.

Acne is one of the medical problems and propionibacterium acnes is the pathogenic agent that has received a considerable attention. Different parts of Juglans regia have been shown to have antibacterial activity on many bacteria. Its leaves have antioxidant property and if it shows antibacterial effect on propionibacterium acnes, it might be an alternative drug for the treatment of this problem. Therefore, this study was aimed to determine the antibacterial effects of walnut leaves on propionibacterium acnes in vitro. In this experimental study, ethanolic extract of walnut leaves was examined for antibacterial activities on propionibacterium acnes using the disk-diffusion minimum inhibitory concentration (MIC), minimum bacterial concentration (MBC) and macrodilution methods. Ampicillin (10µg) was used as a positive control. Ethanolic extract of walnut leaves had an inhibitory effect on Propionibacterium acnes using the agar-diffusion and macrodilution methods. The most inhibition zone was 25 ± 1.7 mm in 150 mg/ml concentration. The minimum inhibitory concentration was 12.5 mg/ml while the minimum bactericidal concentration was 15 mg/ml. These findings showed that ethanolic extract of walnut leaves had antibacterial effect on Propionibacterium acnes and may be considered as an alternative drug for the treatment of external infections due to this microorganism.