본문바로가기

Macroscopic and Microscopic Findings of Microsporum gypseum

Osung Kwon,Joonsoo Park,Yong Joon Bang,Hyun Chung
http://dx.doi.org/10.17966/KJMM.2017.22.3.144 Epub 2017 September 29

0
Cited By

Abstract





Keywords


Macroconidium Microsporum gypseum Morphology



Microsporum (M.) gypseum is a geophilic dermatophyte that is prevalently distributed world-wide[1]. Particular transmissions occur in warm, humid, and rural areas among farmers and children. Clinical forms may present scaly patches of variable shapes and colors on the skin[2]. Tinea capitis is the typical clinical form and pus frequently occurs from palpitated hair follicles[1]-[2].


Macroscopic morphology of M. gypseum is characterized by powdery to granular texture with a color range of white to yellowish, often termed cinnamon colored (Fig. 1A). The powdery appearance is imparted by heavy sporulation on the older mycelium and the edges of the colony can exhibit pleomorphism described as scalloped to ragged nature[3]. The reverse shows no specific pattern indicative of the species. In microscopic morphology, short, spindle-shaped macroconidia are borne directly on hyphae. Characteristic macroconidium is divided in to 4 to 6 septated cells with thick walls and smooth borders (Fig. 1B). Unlike M. canis, macroconidia are more numerous and are less barrel-shaped with fewer cells[4]. Microscopic difference may help distinguish from other dermatophytes, however, culture and genetic studies should discern accurate diagnoses[5].

Figure #1

Fig. 1. A, Clinical image of Tinea capitis caused by M. gypseum presenting multiple yellowish to reddish pustular ulcerative plaques with surrounding scales of an 6 year old female. B, Cottony or powdery surface of the colony ranges from overtones of whitish to yellowish colors. C, Macroconidia of M. gypseum are spindle-shaped with short pedicels, and smooth-bordered thick walls (red arrows). Cells of the macroconidia are usually fewer than 6 cells (black arrowheads), (Cotton blue stain ×400).


References



1. Silva KVS, Lima MIO, Cardoso GN, Santos AS, Silva GS, Pereira FO. Inibitory effects of linalool on fungal pathogenicity of clinical isolates of Micro- sporum canis and Microsporum gypseum. Mycoses 2017;60:387-393
Crossref  Google Scholar 

2. Romano C, Asta F, Massai L. Tinea incognito due to Microsporum gypseum in three children. Pediatr Dermatol 2000;17:41-44
Crossref  Google Scholar 

3. Mihali CV, Buruiana A, Turcus V, Covaci A, Ardelean A. Morphological aspects of fruiting bodies in Microsporum gypseum on Sabouraud's dextrose agar medium. Ann of RSCB 2011;16:85-92
Google Scholar 

4. Demange C, Contet-Audonneau N, Kombila M, Miegeville M, Berthonneau M, De Vroey C, et al. Microsporum gypseum complex in man and animals. J Med Vet Mycol 1992;30:301-308
Google Scholar 

5. Sharma R, Gupta S, Asati DP, Karuna T, Purwar S, Biswas D. A pilot study for the evaluation of PCR as a diagnostic tool in patients with suspected der- matophytoses. Indian Dermatol Online J 2017;8:176 -180

Congratulatory MessageClick here!

Download this article
Submit your research
Jump to: