The Identification of an Uncommon Dermatophyte as an Agent of Tinea Corporis, Microsporum Ferrugineum / Tinea Corporis’in Nadir bir Etkeni olarak Microsporum Ferrugineum’un İdentifikasyonu

Year 2017, Volume: 39 Issue: 2, 70 - 74, 21.07.2017

İman Qoraan Yasemin Öz İşıl Bulur

https://doi.org/10.20515/otd.330021

Abstract

Abstract: A case of 29 years old female who admitted to Eskisehir
Osmangazi University Hospital of Medical Faculty, Dermatology Clinic because of
ringworm skin rashes resembling tinea corporis has been represented in this
paper. Hyaline septate branching hyphae were seen in microscopic examination of
skin scrapping specimens and the agent grown on Sabouraud dextrose agar (SDA)
and mycobiotic agar including cycloheximide and chloramphenicol after four
weeks. Based on its microscopic characteristics and the results of several
phenotypic tests such as frequent reflexive hyphae formation on corn meal tween
80 agar, yellow pigment production on Lowenstein Jensen agar, positive urease test
in Christensen urea broth and failure to grow at 37ºC on SDA, the isolate was
identified as Microsporum ferrugineum which share similar macroscopic
characteristics with dysgonic strains of other dermatophytes. Topical
sertaconazole nitrate implementation was started for treatment and clinical and
mycological response was observed after one month.

Key
words: Dermatophytes, Tinea corporis, Microscopic characteristics, phenotypic
tests

Öz: Bu
makalede tinea corporisi düşündüren halka şeklindeki cilt döküntüleriyle
Eskişehir Osmangazi Üniversitesi Tıp Fakültesi Hastanesi, Dermatoloji
Kliniği’ne başvuran 29 yaşında bir kadın olgu sunulmuştur. Hastanın cilt
kazıntı örneklerinin mikroskobik incelemesinde dallanan septalı hifler görüldü
ve dört hafta sonunda etken Sabouraud dekstroz agar (SDA) ve sikloheksimid ve
kloramfenikol içeren mikobiyotik agarda üredi. Mikroskobik özellikleri ve mısır
unlu tween 80 agarda sık refleksif hiflerin oluşumu, Löwenstein Jensen agarda
sarı pigment üretimi, Christensen üre besiyerinde pozitif üreaz testi ve SDA’da
37ºC’de üreme yetersizliği gibi birkaç fenotipik test sonucuna dayanılarak
izolat, diğer dermatofitlerin disgonik kökenleri ile benzer makroskobik
özellikleri paylaşan Microsporum ferrugineum olarak tanımlandı. Tedavi amacıyla
topikal sertakonazol nitrat başlandı ve bir ay sonra klinik ve mikolojik yanıt
gözlendi.

Anahtar kelimeler:
Dermatofitler, Tinea corporis, mikroskobik özellikler, fenotipik testler

Keywords

Dermatophytes, Tinea corporis, Microscopic characteristics

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