Abstract
Abstract A description is provided for Trichophyton violaceum . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Primarily a pathogen of man (causing mycoses). Also recorded from buffalo, cat, cattle, dog and mouse (RMVM 6, 3187; 10, 505). The cat, dog, guineapig, monkey and mouse have been infected experimentally. The horse, fowl and pigeon have been implicated as hosts of T. violaceum . DISEASE: Ringworm (dermatophytosis, tinea). The scalp (tinea capitis), beard (tinea barbae), body (tinea corporis) and nails (tinea unguium, onychomycosis) may be infected. Infected hairs show an endothrix type of invasion and do not fluoresce under Wood's light. The hairs may break and curl producing 'black dots' on the scalp (also sometimes produced by other endothrix Trichophyton species). Inflammatory lesions (occasionally with the development of kerion), scarring and alopecia and, occasionally, favus-like lesions may occur. Infections of the subcutaneous tissues, lymph nodes, brain, bones and other internal tissues have been reported (RMVM 3, 1441; 4, 716; 9, 677; 11, 708; 12, 1847; 13, 961, 1572). GEOGRAPHICAL DISTRIBUTION: Worldwide. A dominant cause of scalp ringworm in S. and E. Europe, the Middle East, N. Africa, parts of Central and E. Africa, S. Africa and Asia (RMVM 10, 602; 13, 1558).
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