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Molecular Characterization and Antifungal Susceptibility Profile of Dermatophytes Isolated From Scalp Dermatophyte Carriage in Primary School Children in Arak City, Center of Iran Publisher Pubmed



Allahdadi M1 ; Hajihossein R2 ; Kord M3 ; Rahmati E4 ; Amanloo S5 ; Didehdar M6
Authors
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Authors Affiliations
  1. 1. Department of microbiology, Islamic Azad University, Arak Branch, Arak, Iran
  2. 2. Department of medical parasitology and mycology, Arak University of Medical Sciences, Arak, Iran
  3. 3. Department of medical parasitology and mycology, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of medical laboratory sciences, Arak University of Medical Sciences, Arak, Iran
  5. 5. Department of medical parasitology and mycology, Zanjan University of Medical Sciences, Zanjan, Iran
  6. 6. Infectious Diseases Research Center (IDRC), Department of Medical Parasitology and Mycology, Arak University of Medical Sciences, Arak, Iran

Source: Journal de Mycologie Medicale Published:2019


Abstract

Objective: Asymptomatic carriage is a condition of positive dermatophyte scalp culture without signs and symptoms of tinea capitis. Carriers are the source of dermatophytes that are able to transfer fungal agents to other people. The aim of this study was evaluating asymptomatic dermatophyte scalp carriage among students of primary schools in Arak city. Materials and methods: Sampling by a sterilized hairbrush from scalp was performed among 3174 students. Hairbrush was inoculated onto Mycosel agar plates. Dermatophyte isolates were identified by PCR-RFLP using MvaI enzyme. In vitro antifungal susceptibility test was done according to the Clinical and Laboratory Standards Institute (CLSI) M38-A2 protocol. The antifungal drugs used included griseofulvin (GRZ), terbinafine (TER), itraconazole (ITC) and fluconazole (FLU). Results: A total of 3174 schoolchildren were screened, 15 cases (0.48%) had a positive culture for dermatophytes. Asymptomatic carriers including 11 (73.3%) boys and 4 (26.7%) girls and their age range were between 7–12 years. Trichophyton tonsurans (80%), T. interdigitale (13.3%) and T. rubrum (6.7%) were the most common isolated dermatophyte. Based on the obtained antifungal susceptibility results, terbinafine had the lowest and fluconazole had the highest MIC values for all of the tested dermatophyte isolates. Conclusion: In the study, T. tonsurans was the most common species isolated from asymptomatic carriers and of the four antifungals tested, terbinafine had the most active antifungal in vitro against all isolates. Identifying and treating scalp dermatophyte carriers can prevent the spread of tinea capitis in the community. © 2019 Elsevier Masson SAS
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