Phenotypic and Genotypic Characterization of Malassezia Species Isolated From Malassezia Associated Skin Diseases
Study Details
Study Description
Brief Summary
Genus Malassezia includes 14 species, namely M. furfur, M. sympodialis, M. globosa, M. restricta, M. slooffiae, M. obtusa, M. dermatis, M. japonica and M. yamatoensis associated with normal human flora but can also cause skin lesions, and M. pachydermatis, M. nana, M. equina, M. caprae and M. cuniculiare associated with animals. Few studies found that M. pachydermatis may be transmitted to humans from pets. M. pachydermmatis is the only lipid independent species while others are lipid dependent .
As Malassezia species have similar morphological and biochemical features, the currently used phenotypic techniques for diagnosis of Pityriasis versicolor usually do not allow rapid and exact characterization. In addition; they are time-consuming, multi-step processes requiring several experimental methods. Therefore, several molecular typing methods have been used successfully, resulting in identification and classification of new Malassezia species
Aim of the work:
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Phenotypic and Genotypic Characterization of Malassezia Species.
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Identify antifungal resistance pattern among isolated fungus.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| case
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Diagnostic Test: culture and antifungal sensitivity and molecular detection
Samples will be cultured on Modified Dixon media for 10 days at temperature between 32-34°C.Molecular detection of malassezia species by Restriction Fragment Length Polymorphism (RFLP) .
Antifungal susceptibility testing of the isolates will be performed using the following antifungals Fluconazole, AmphotericinB and Fluocytosine
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| control
|
Diagnostic Test: culture and antifungal sensitivity and molecular detection
Samples will be cultured on Modified Dixon media for 10 days at temperature between 32-34°C.Molecular detection of malassezia species by Restriction Fragment Length Polymorphism (RFLP) .
Antifungal susceptibility testing of the isolates will be performed using the following antifungals Fluconazole, AmphotericinB and Fluocytosine
|
Outcome Measures
Primary Outcome Measures
- frequency of malassezia in patients [6 months]
frequency of malassezia in patients with malassezia associated skin infection
Eligibility Criteria
Criteria
Inclusion Criteria:
Characteristic lesions of hypopigmented or hyperpigmented scaly macules and patches which may be associated with itching in patients with Pityriasis versicolor and scales of Seborrheic dermatitis and scales from patients with Atopic dermatitis.
Exclusion Criteria:
Patients with skin lesions of extensive desquamation or inflammation that do not match Pityriasis versicolor , Seborrheic dermatitis or Atopic dermatitis. Patients who had received topical antifungal therapy within last three months or oral antifungal therapy within the last six months
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Sohag University Hospital | Sohag | Egypt |
Sponsors and Collaborators
- Sohag University
Investigators
None specified.Study Documents (Full-Text)
None provided.More Information
Publications
- Angiolella L, Carradori S, Maccallini C, Giusiano G, Supuran CT. Targeting Malassezia species for Novel Synthetic and Natural Antidandruff Agents. Curr Med Chem. 2017;24(22):2392-2412. doi: 10.2174/0929867324666170404110631. Review.
- Gaitanis G, Magiatis P, Hantschke M, Bassukas ID, Velegraki A. The Malassezia genus in skin and systemic diseases. Clin Microbiol Rev. 2012 Jan;25(1):106-41. doi: 10.1128/CMR.00021-11. Review.
- Lee YW, Byun HJ, Kim BJ, Kim DH, Lim YY, Lee JW, Kim MN, Kim D, Chun YJ, Mun SK, Kim CW, Kim SE, Hwang JS. Distribution of malassezia species on the scalp in korean seborrheic dermatitis patients. Ann Dermatol. 2011 May;23(2):156-61. doi: 10.5021/ad.2011.23.2.156. Epub 2011 May 27.
- Lyakhovitsky A, Shemer A, Amichai B. Molecular analysis of Malassezia species isolated from Israeli patients with pityriasis versicolor. Int J Dermatol. 2013 Feb;52(2):231-3. doi: 10.1111/j.1365-4632.2012.05595.x.
- soh-Med-22-07-08