Trichophyton soudanense . [Descriptions of Fungi and Bacteria

Abstract

Abstract A description is provided for Trichophyton soudanense . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Pathogenic for man (causing mycoses). The guineapig and monkey have been infected experimentally (RMVM 6, 2253). DISEASE: Ringworm (dermatophytosis, tinea). The scalp (tinea capitis), body (tinea corporis) and less frequently the hands (tinea manuum), feet (tinea pedis) and nails (onychomycosis, tinea unguium) may be infected. Infected hairs show an endothrix type of invasion and do not fluoresce under Wood's light. Lesions of the scalp may be of the 'black dot' type (see CMI Description No. 646). Lesions are usually scaling and non-inflammatory. Inflammation, varying from slight folliculitis to kerion formation, scarring and alopecia, may occur (RMVM 6, 2253). GEOGRAPHICAL DISTRIBUTION: Africa, particularly the tropical lowlands and semi-arid areas of subsaharan West Africa, extending from Senegal to Chad and the western half of Zaire, and southern Sudan. Most cases reported from other countries have been in African immigrants or patients who have been in contact with Africans. The occurrence of a few cases in USA and Brazil has led to the suggestion that T. soudanense was imported into the American continent with the slave trade (RMVM 4, 2c; 6, 2253; 10, 602; 13, 1558).