An additional case of tinea nigra palmaris is recorded. Tinea nigra palmaris was experimentally produced. This occurred only when a suspension of the filamentous phase of a culture of Cladosporium wernecki was inoculated in a bleeding scarified area. The eruption appeared seven weeks after inoculation. This infection is much more common in the left palm.
RITCHIE EB, TAYLOR TE. A Study of Tinea Nigra Palmaris: Report of a Case and Inoculation Experiments. Arch Dermatol. 1964;89(4):601–603. doi:10.1001/archderm.1964.01590280101018
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