Pitted keratolysis is a multifocal superficial erosion of the stratum corneum, usually limited to the soles of the feet. A causative agent has been described previously, but its identity is unclear. While studying a lesion of pitted keratolysis, we found an actinomycete with the morphologic appearance of Dermatophilus congolensis, the cause of dermatophilosis in animals. From our study of this case and from a review of the literature we believe that D congolensis was a causal factor in this lesion and that it was probably the causative agent of some cases of pitted keratolysis described previously.
Rubel LR. Pitted Keratolysis and Dermatophilus congolensis. Arch Dermatol. 1972;105(4):584-586. doi:10.1001/archderm.1972.01620070056021