(described by Micheli ex Saint-Amans in 1821) Taxonomic classification Kingdom: Fungi Phylum: Zygomycota Order: Mucorales Family: Mucoraceae Genus: Mucor Description and Natural Habitats Mucor is a filamentous fungus found in soil, plants, decaying fruits and vegetables. As well as being ubiquitous in nature and a common laboratory contaminant, Mucor spp. may cause infections in man, frogs, amphibians, cattle, and swine. Most of the Mucor spp. are unable to grow at 37°C and the strains isolated from human infections are usually one of the few thermotolerant Mucor spp. [531, 1295, 2165, 2202]. Species The genus Mucor contains several species. The most […]

Georg, Ajello, Friedman et Brinkman, 1962   Macroscopic morphology Microsporum vanbreuseghemii colonies grow moderately rapidly and mature in a week. The texture is flat, spreading and granular to velvety. The front color is cream yellow, lavender pink or tan. A lemon yellow or yellow to orange diffusible pigment is observed from the reverse. Microscopic morphology Microsporum vanbreuseghemii produces septate branching hyphae, macroconidia, and microconidia. Macroconidia are 6- to 13-celled, cylindrical (pencil-shaped) to fusiform, rough, and thick-walled. Microconidia are unicellular and obovoid to pyriform in shape. Special notes In vitro hair perforation test is positive. The teleomorph state of Microsporum vanbreuseghemii […]

(described by Gruby in 1843) Taxonomic classification Kingdom: Fungi Phylum: Ascomycota Order: Onygenales Family: Arthrodermataceae Genus: Arthroderma (includes Nannizia, Microsporum, Epidermophyton, Trichophyton) Description and Natural Habitats Microsporum is a filamentous keratinophilic fungus included in the group of dermatophytes. While the natural habitat of some of the Microsporum spp. is soil (the geophilic species), others primarily affect various animals (the zoophilic species) or human (the anthropophilic species). Some species are isolated from both soil and animals (geophilic and zoophilic). Most of the Microsporum spp. are widely distributed in the world while some have restricted geographic distribution. Microsporum is the asexual state […]

Fuentes, 1956 Macroscopic morphology Microsporum nanum grows moderately rapidly and the diameter of the colony reaches 1 to 3 cm following incubation at 25°C for 7 days on Sabouraud dextrose agar. The texture is powdery, cottony, thin, spreading, velvety or flat and often has some radial, shallow furrows. The color is white to dark beige from the front and reddish brown from the reverse. Microscopic morphology Microsporum nanum produces septate hyphae, macroconidia, and microconidia. Macroconidia are 1- to 4-celled (usually 2) and thin walled and oval to elliptical in shape. Microconidia are club-shaped and their abundance may vary. Special notes […]

(Megnin) Grigorakis, 1929 Macroscopic morphology The growth rate of the colonies is moderately rapid, reaching a diameter of 1-3 cm on Sabouraud dextrose agar incubated at 25°C for 7 days. The texture is velvety to woolly or cottony and more or less wrinkled. The color is white to gray and turns pink to buff with age. It produces a strawberry-red diffusing pigment. Microscopic morphology Microsporum gallinae produces septate hyphae, macroconidia and microconidia. Macroconidia and microconidia may be few or abundant. Macroconidia are clavate to cigar-shaped and 2- to 10-celled. Most commonly, 5-6 cells are observed. They are often slightly curved […]

Ajello, 1959 Macroscopic morphology The growth rate of Microsporum cookei is moderately rapid. The diameter of the colony reaches 1 to 3 cm following incubation at 25°C for 7 days on Sabouraud dextrose agar. The texture is downy to powdery. The front color is initially white to yellow and may turn to grape red or dark brown in time. The reverse is dark red to dark brown. Microscopic morphology Microsporum cookei produces septate branching hyphae, macroconidia, and microconidia. The macroconidia are numerous, oval in shape, thick-walled, rough and 6- to 10-celled. Microconidia are also abundant. They are unicellular and ovoid […]

Bodin, 1902   Macroscopic morphology Microsporum canis grows rapidly and the diameter of the colony reaches 3 to 9 cm following incubation at 25°C for 7 days on Sabouraud dextrose agar. The texture is woolly to cottony and flat to sparsely grooved. The color is white to yellowish from the front and deep yellow to yellow-orange from the reverse. Microscopic morphology Microsporum canis produces septate hyphae, macroconidia, and microconidia. Macroconidia are spindle-shaped, with an asymmetrical apical knob. They are 6- to 15-celled, long, rough and have thick outer cell walls. The septal walls are thin. Microconidia are rare, unicellular and […]

(described by Gruby in 1843) Macroscopic morphology Colonies are slow growing, flat, spreading, dense, with a furlike mat having radiating edges. The color of the colony is grayish white to tannish white and rarely rust. From the reverse, it is salmon pink to peach or rose brown. Microscopic morphology Microsporum audouinii produces pectinate hyphae and rare macro- and microconidia. Terminal chlamydoconidia may also be formed which have short, spine-like projections, giving a pointed appearence at the tip. When present, macroconidia are smooth to sparsely echinulate, poorly developed, thick walled and irregularly spindle shaped. Microconidia are also rare and when present, […]