The antifungal effect of roselle calyx extract on Trichophyton rubrum growth in vitro

Abstract

Sari SA, Dharmawan R, Dirgahayu P. 2012. The antifungal effect of roselle calyx extract on Trichophyton rubrum growth in vitro. Biofarmasi 10: 17-22. Dermatophytosis is a fungal infection on skin that one of them caused by Trichophyton rubrum. Dermatophytosis treatment by using chemical drugs has many shortcomings, such as a high cost and a drug resistance. Roselle (Hibiscus sabdariffa L.) calyx content was flavonoid, which have an antifungal effect. Flavonoids on roselle calyx include anthocyanin, gossypeptin (hexahydroxyflavone) 3-glucoside, flavonol glucoside hibiscritin, flavonoid gossypeptin, delphinidine 3-monoglucoside, cyanidin 3-monoglucoside. The objective of this study was to determine the effect of roselle calyx on Trichophyton rubrum growth in vitro. The study was performed as an experimental laboratory. The object of study was T. rubrum. The sample of T. rubrum colonies in this study was taken by a random sampling. The study used T. rubrum colonies on seven Sabouraud Dextrose Agar plates. Each plate had four holes. Each hole was filled by aquadest as a negative control, fluconazole 25 µg/mL as a positive control, and various roselle calyx extract concentrations (10%, 20%, 30%, 40% and 50%). The plates were incubated in an incubator with a temperature of 25oC for 7 days and measured for the diameter of roselle calyx extract inhibition effect. The data were collected and analyzed by One-way ANOVA and Least Significance Difference (LSD) tests on SPSS 16.0 for Windows. The result of One-way ANOVA test showed that there was a difference of inhibition diameter mean among all of the various roselle calyx extract concentration groups (p<0.05). The diameter of roselle calyx extract inhibition effect increased for each concentration up to 50%. The inhibition diameter of positive control compared to 20% roselle calyx extract concentration had no a significant difference. The study was concluded that roselle calyx extract has an antifungal effect to T. rubrum growth in vitro.