A Comparative Study on Phenotypic versus ITS-Based Molecular Identification of Dermatophytes Isolated in Dakar, Senegal
Joint Authors
Badiane, Aida Sadikh
Ndiaye, Mouhamadou Mansour
Diongue, Khadim
Seck, Mame Cheikh
Diallo, Mamadou Alpha
Ndiaye, Daouda
Bréchard, Ludivine
Ranque, Stéphane
Source
International Journal of Microbiology
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-12-19
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
Classically, dermatophytes are identified by phenotypic methods even if these methods, sometimes, remain difficult or uncertain.
On the other hand, nucleotide sequence analysis of internal transcribed spacers (ITS) of rDNA has proved to be a useful method for identification of dermatophytes.
The objective of this study was to compare the phenotypic method with DNA sequencing of the ITS regions for identification of dermatophyte species isolated in Dakar, Senegal.
A collection of thirty-two strains of dermatophytes were isolated from patients suffering from dermatophytosis.
Mycological identification revealed Trichophyton soudanense (n = 13), T.
interdigitale (n = 10), Microsporum audouinii (n = 5), and one strain for each of the following species: T.
rubrum, T.
mentagrophytes, and M.
canis and one unidentified strain.
For comparison, ITS-based PCR and DNA sequencing were applied for identification of the isolated dermatophytes.
ITS sequences showed, in BLAST search analysis, 99-100% of similarity.
Identification of dermatophyte isolates by conventional methods was confirmed by DNA sequencing of the ITS regions in 84% of cases.
Discrepancies concern mostly T.
rubrum misidentified as T.
interdigitale.
PCR sequencing provided an excellent tool for identifying dermatophyte strains that do not present typical morphological characteristics.
It was also able to give correct identification of an atypical strain of M.
audouinii responsible of mycetoma of the scalp.
American Psychological Association (APA)
Diongue, Khadim& Bréchard, Ludivine& Diallo, Mamadou Alpha& Seck, Mame Cheikh& Ndiaye, Mouhamadou Mansour& Badiane, Aida Sadikh…[et al.]. 2019. A Comparative Study on Phenotypic versus ITS-Based Molecular Identification of Dermatophytes Isolated in Dakar, Senegal. International Journal of Microbiology،Vol. 2019, no. 2019, pp.1-6.
https://search.emarefa.net/detail/BIM-1166275
Modern Language Association (MLA)
Diongue, Khadim…[et al.]. A Comparative Study on Phenotypic versus ITS-Based Molecular Identification of Dermatophytes Isolated in Dakar, Senegal. International Journal of Microbiology No. 2019 (2019), pp.1-6.
https://search.emarefa.net/detail/BIM-1166275
American Medical Association (AMA)
Diongue, Khadim& Bréchard, Ludivine& Diallo, Mamadou Alpha& Seck, Mame Cheikh& Ndiaye, Mouhamadou Mansour& Badiane, Aida Sadikh…[et al.]. A Comparative Study on Phenotypic versus ITS-Based Molecular Identification of Dermatophytes Isolated in Dakar, Senegal. International Journal of Microbiology. 2019. Vol. 2019, no. 2019, pp.1-6.
https://search.emarefa.net/detail/BIM-1166275
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1166275