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In Vitro Antifungal Activity of Green Synthesized Silver Nanoparticles in Comparison to Conventional Antifungal Drugs Against Trichophyton Interdigitale, Trichophyton Rubrum and Epidermophyton Floccosum Publisher Pubmed



Mahmoudi S1 ; Vahidi M1 ; Malekabad ES2 ; Izadi A5 ; Khatami M3 ; Dadashi A4
Authors
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Authors Affiliations
  1. 1. Department of Medical Laboratory Sciences, School of Allied Medical Sciences, Aja University of Medical Sciences, Tehran, Iran
  2. 2. Department of Social Medicine, School of Medicine, Aja University of Medical Sciences, Tehran, Iran
  3. 3. Nano Bio Electrochemistry Research Center, Bam University of Medical Sciences, Bam, Iran
  4. 4. Department of Infectious Diseases, School of Medicine, Aja University of Medical Sciences, Tehran, Iran
  5. 5. Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

Source: Infectious Disorders - Drug Targets Published:2021


Abstract

Background: Dermatophytosis is a globally distributed fungal infection. Treatment fail-ure and relapse is common in this disease. Silver nanoparticles are known for their promising an-timicrobial activity. The aim of this study was to determine the antifungal activity of these nanopar-ticles against common dermatophyte species. Methods: A set of 30 molecularly identified dermatophytes including Trichophyton interdigitale (n=10), Trichophyton rubrum (n=10), and Epidermophyton floccosum (n=10) were used in this study. Green synthesized silver nanoparticles using chicory (Cichorium intybus) were tested for their antifungal activity in comparison to fluconazole, itraconazole and terbinafine. Interspecies differences in minimum inhibitory concentrations of antifungal drugs and silver nanoparticles were tested using Kruskal–Wallis test in SPSS software version 21. Results: The highest minimum inhibitory concentrations (MICs) among antifungal drugs were observed for fluconazole [range: 4–64 μg/mL, geometric mean (GM) =17.959 μg/mL], followed by itraconazole (range: 0.008–0.5, GM= 0.066) and terbinafine (range: 0.004–0.25 μg/mL, GM=0.027 μg/mL). Silver nanoparticles showed potent antifungal activity against all dermatophyte isolates with MICs (range: 0.25–32 μg/mL, GM=4.812 μg/mL) higher than those of itraconazole and terbi-nafine, but lower than fluconazole. MIC values of silver nanoparticles demonstrated significant differences between species (P=0.044), with E. floccosum having the highest MICs (GM=9.849 μg/mL) compared to T. inter-digitale (GM=3.732 μg/mL) and T. rubrum (GM=3.031 μg/mL). Conclusion: Silver nanoparticles demonstrated promising anti-dermatophyte activity against the studied dermatophytes. Due to their wide-spectrum activity against other fungal and bacterial patho-gens, they could be a potential choice, at least in the case of cutaneous and superficial infections. © 2021 Bentham Science Publishers.
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