''Trichophyton interdigitale'' is a clonal line within sexual species '' T. mentagrophytes''. It causes

onychomycosis Onychomycosis, also known as tinea unguium, is a fungal infection of the nail. Symptoms may include white or yellow nail discoloration, thickening of the nail, and separation of the nail from the nail bed. Toenails or fingernails may be affected ...

and

tinea pedis Dermatophytosis, also known as ringworm, is a fungal infection of the skin. Typically it results in a red, itchy, scaly, circular rash. Hair loss may occur in the area affected. Symptoms begin four to fourteen days after exposure. Multiple ar ...

in humans, and has never been isolated from animals. ''Trichophyton interdigitale'' isolates cannot be reliably discriminated from ''T.mentagrophytes'' by cultural techniques or

MALDI-TOF In mass spectrometry, matrix-assisted laser desorption/ionization (MALDI) is an ionization technique that uses a laser energy absorbing matrix to create ions from large molecules with minimal fragmentation. It has been applied to the analysis of b ...

mass spectrometry, and therefore ITS region DNA sequencing is recommended.

Critics

''Trichophyton interdigitale'' is defined by its capability of transmission between human hosts and clonal way of reproduction. However, there is at least one another anthropophilic clonal line within '' T. mentagrophytes'', phylogenetically unrelated to ''T. interdigitale''.

References

Arthrodermataceae Fungi described in 1917 {{Eurotiomycetes-stub