Fungal Infections

Species name

Trichophyton interdigitale

Teleomorph

Arthroderma vanbreuseghmii

Natural Hábitat 

Humans and occasionally animals like cats, dogs and rats..

Geography

Worldwide

Frequency

The second commonest cause of dermatophytosis.

Diseases

Tiñea pedis, corporis, cruris, onychomycosis and occasionally Tinea capitis

Culture peculiarities

The colonies are white or cream with a yellow pigment and a surface  powdery appearance, the underside of the plate is orange to yellow.By microscopy the conidia are abundant and either rounded or tear shaped. Usually the macroconidia are absent when the strain has been isolated from humans, and can form fine walled cigar shapes. 

Antifungal resistance (intrinsic and acquired)

Terbinafine would be the optimal treatment. Other antifungals like ketoconazole, clotrimazole, itraconazole, naphthalene and  amorolfine are also active. This species is generally resistant to fluconazole. Resistance to other antifungals is unknown.

Biosecurity level 2:

This species should be handled in a level 2 containment facility.

 Industrial use

None

Images

Trichophyton

Culture of Trichophyton interdigitale 

TrichophytonTrichophyton

Microscopical morphology

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