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11736

Comparison of Broth Micro Dilution and Disk Diffusion Methods for Susceptibility Testing of Dermatophytes

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Last updated: 24 Dec 2024

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Abstract

Background: Dermatophytes are responsible for the majority of the fungal infections involving skin, hair and nails. There has been a remarkable increase in the number of fungal infections especially in those people whose immune system is compromised by aging, HIV infection, organ transplantation or cancer therapy. Objective: The aim of this study was to compare both broth microdilution method & disk diffusion method for in-vitro activity of some antifungal drugs (Terbinafine, Fluconazole, Itraconazole) against different species of dermatophytes. Patients and Method: This study was performed on 50 dermatophyte isolates recovered from various clinical specimens (skin, hair and nail) collected from dermatology outpatient clinic of Ain Shams University Hospital. All samples were cultured on sabarouds. Isolates recovered from SDA were subcultured on Potato Dextrose Agar (PDA) & incubated at 28°C for 7 days to enhance sporulation. The growth was harvested in sterile saline & the conidial and hyphal suspension was adjusted to 0.5 macfarland. Then antifungal susceptibility was done using: Disk diffusion (DD) method and Broth micro dilution (BMD) method. Results: There was a highly significant agreement between the antifungal susceptibility testing of fluconazole, itraconazole and terbinafine by disk diffusion method and Broth micro-dilution method. In our studyagreement between both methods for itraconazole was 1.00 (kappa), for terbinafine was 0.947, and for fluconazole was 0.878. The factors that may affect the results of BMD or DD are type and size of inoculum, composition of the media, temperature and duration of incubation and disc strength. Conclusion: There was a highly significant agreement between the antifungal susceptibility testing of fluconazole, 

DOI

10.12816/0040624

Keywords

Dermatophytes, Disk diffusion, Broth micro-dilution

Authors

First Name

Manal

Last Name

Abd El Alim

MiddleName

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Affiliation

Clinical Pathology Department, Ain Shams University, Cairo, Egypt

Email

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Orcid

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First Name

Rania M

Last Name

Abdel Halim

MiddleName

-

Affiliation

Clinical Pathology Department, Ain Shams University, Cairo, Egypt

Email

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City

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Orcid

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First Name

Sara A

Last Name

Habib

MiddleName

-

Affiliation

Clinical Pathology Department, Ain Shams University, Cairo, Egypt

Email

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City

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Orcid

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Volume

69

Article Issue

2

Related Issue

2165

Issue Date

2017-10-01

Receive Date

2018-08-28

Publish Date

2017-10-01

Page Start

1,923

Page End

1,930

Print ISSN

1687-2002

Online ISSN

2090-7125

Link

https://ejhm.journals.ekb.eg/article_11736.html

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https://ejhm.journals.ekb.eg/service?article_code=11736

Order

23

Type

Original Article

Type Code

606

Publication Type

Journal

Publication Title

The Egyptian Journal of Hospital Medicine

Publication Link

https://ejhm.journals.ekb.eg/

MainTitle

Comparison of Broth Micro Dilution and Disk Diffusion Methods for Susceptibility Testing of Dermatophytes

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Article

Created At

22 Jan 2023