Abstract
Background and Objectives Considering the existence of many medicinal plants in Iran and the high prevalence of oral candidiasis, the present study aims to evaluate the inhibitory effects of Nepeta crispa L. and Nepeta cataria extracts on Candida albicans growth. Subjects and Methods After preparing the extracts of two plants, their minimum inhibitory concentration (MIC) and minimum lethal concentration (MLC) for C albicans were measured by broth microdilution method. The inhibitory effect of the extracts was evaluated by the disk diffusion method and measuring the diameter of inhibition zone. Data were analyzed in SPSS software, version 22. The significant level was set at 0.05. Results The MIC of N. crispa L. and N. cataria extracts was 1.1 and 2.4 μg/mL, respectively. Their MLC was 4 and 6 μg/mL, respectively. The highest inhibition zone diameter was for nystatin (21.31 mm), while the lowest diameter was for N. cataria extract (11.60 mm). No. significant difference was observed in the inhibition zone diameter between nystatin and N. crispa L. extract (P>0.05). Conclusion The inhibitory effect of N. crispa L. extract on the candida albicans growth is not significantly different from the effect of nystatin. Although N. cataria extract has inhibitory effect, its effect is significantly lower than the effect of nystatin.
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