본문바로가기

Microscopic Findings of Macroconidia in Microsporum canis

Yong Woo Choi,Osung Kwon,Joonsoo Park,Yong Joon Bang
http://dx.doi.org/10.17966/KJMM.2017.22.2.84 Epub 2017 June 25

3
Cited By

Abstract





Keywords


Dermatophytes Macroconidia Microsporum canis



Microsporum canis is a part of family of fungi known as dermatophytes[1]. It can cause a scaly, crusted rash that may appear as round, erythematous patches on the skin[1]. Other symptoms and signs include hairless patch, scaling on the scalp, itching and blister-like lesion[1]. The natural reservoir of Microsporum canis is in cats and dogs[1]. It can also be transmitted to humans through direct and indirect contact with animals and fomites such as combs, brushes, hats, furniture, and linens etc[1].


In macroscopic morphology, Microsporun canis forms a white or yellowish, coarsely fluffy spreading colony with a distinctive hairy or feathery texture[2][3] (Fig. 1A). The reverse may characteristic pale tan to yellowish color which tends to turn brownish as it grows[2][3] (Fig. 1B). In microscopic morphology Microsporun canis septate hyphae which club shaped macroconidia may be found[2][4] (Fig. 1C). Macroconidia have relatively thick, coarsely roughened wall with knob-like end and contain internal cells divided into more than 6 compartments separated by broad cross-walls[2][4]. When we differentiate from other species of dermatophytes, consideration should be given to the characteristic macroscopic and microscopic findings of Microsporun canis.


Figure #1

Fig. 1. A, B, C. A, White colored coarsely fluffy spreading colony with distinctive feathery texture was seen on Sabouraud's dextrose agar after 5days on 25℃ B, From below, characteristic pale tan to yellowish colored stellated shaped colony C, Barrel-shaped, rough macroconidia have pointed ends which turn slightly to one side at the tip and have 6 cells (black arrow heads). (Methylene blue ×200)



Conflict of interest


In relation to this article, I declare that there is no conflict of interest.

References



1. Weitsman I, Summerbell RC. The dermatophytes. Clin Microbiol Rev 1995;8:240-259
Crossref 

2. Cabañes FJ. Dermatophytes in domestic animals. Biology of dermatophytes and other keratinophilic fungi. Revista Iberoamericana de Micología, chapter 13. Bilbao, 2000:104-108
Google Scholar 

3. Bodin E. Les champignons parasites de l'homme (in French). Paris, France: Masson et Cie:137

4. Nenoff P, Krüger C, Ginter-Hanselmayer G, Tietz HJ. Dermatomycoses: Causative agents, epidemiology and pathogenesis, Mycology, 2014;12:188-209
Google Scholar 

Congratulatory MessageClick here!

Download this article
Submit your research
Jump to: