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Microsporum ferrugineum
Microsporum ferrugineum is a causative agent of Tinea capitis. (Information from www.doctorfungus.org @ 2005)
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Microsporum ferrugineum Mold
Pictures
(Image Courtesy of www.doctorfungus.org @ 2005) Microscopic morphology of Microsporum ferrugineum No microconidia or macroconidia are produced, only irregular branching hyphae with prominent cross walls ("bamboo" hyphae) and occasional to numerous chlamydoconidia occur. The so - called "bamboo" hyphae are a characteristic of this species.
(Image Courtesy of www.doctorfungus.org @ 2005)
Culture of Microsporum ferrugineum on mycobiotic agar showing a waxy, glabrous, convoluted thallus with a cream to buff colored surface and no reverse pigment.
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Ecology Microsporum ferrugineum is a cosmopolitan fungus which is considered as an anthropophilic dermatophyte. It is commonly encountered in Africa, East Asia, and Eastern Europe.
Pathogenicity and Health Effects
Macroscopic Appearance Ø Growth rate is slow to very slow and diameter of colonies ranges from 0.5 to 1 cm. incubated on Sabouraud dextrose agar at 25°C for 7 days; Ø There are two types colonies depending on their physical appearance; Ø The first type of colony is heaped, wrinkled, glabrous, and commonly with furrows and folds, and the surface colony color is yellow to rust and the reverse is observed with dull orange pigmentation; and Ø The second type of colony is flat, with texture of leathery to downy, spreading, and white in color.
Microscopic Appearance Ø Septate and sterile hyphae is produced by Microsporum ferrugineum which is commonly deformed and irregularly branched showing a bamboo – like appearance; Ø Hyper - segmented, long, straight, and thick – walled hyphae are frequently present; and
Ø
Microsporum ferrugineum
do not produce
macroconidia nor microconidia, however, spindle – shaped macroconidia may
be produced on rice grains or in diluted Sabouraud agar. |
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The mycological information gathered and |
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