An analysis of over 7,500 mycologic examinations has shown that Trichophyton rubrum is much more frequently isolated from skin scrapings than is T mentagrophytes, which confirms a trend reported ten years ago. Candida albicans was also a frequent isolate.
Rosenthal SA, Fine HL, Baer RL. Present-Day Incidence of Superficially Infecting Pathogenic FungiSpecies Identified in a Diagnostic Laboratory of Mycology Between 1964 and 1966. Arch Dermatol. 1967;96(1):51-52. doi:10.1001/archderm.1967.01610010057007