is a cosmopolitan fungus which is considered as an
dermatophyte. It is commonly encountered in Africa, East Asia, and
Pathogenicity and Health Effects
is a frequent causative agent of
tinea infection of the scalp in
human adolescents in certain prevalent regions.
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;
There are two types colonies depending on their physical appearance;
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
second type of colony is flat, with texture of leathery to downy,
spreading, and white in color.
Septate and sterile hyphae is produced by Microsporum ferrugineum
which is commonly deformed and irregularly branched showing a bamboo –
Hyper - segmented, long, straight, and thick – walled hyphae are
frequently present; and
do not produce
macroconidia nor microconidia, however, spindle – shaped macroconidia may
be produced on rice grains or in diluted Sabouraud agar.