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J Clin Microbiol. 1977 January; 5(1): 34-38

Dermatophyte isolation media: quantitative appraisal using skin scales infected with Trichophyton mentagrophytes and Trichophyton rubrum.

ABSTRACT

Various dermatophyte isolation media were quantitatively appraised by colony counts for their ability to support growth when suspensions of trypsin-treated infected-skin scales were used as inocula. Evaluation included guinea pig skin scales infected with a granular Trichophyton mentagrophyton mentagrophytes, and one trial was conducted using human skin scales infected with Trichophyton rubrum. No differences in the ability to support growth were observed among Taplin Dermatophyte Test medium, Dermatophyte Test Medium (Schering Diagnostics, Port Reading, N.J.),Sabouraud medium plus cycloheximide and chloramphenicol, Youssef medium for dermatophytes product no. 103S semisynthetic lots no. 106 and no. 107. With skin scales not grossly contaminated with bacteria, similar counts were obtained with Littman oxgall agar without antibiotics. Youssef medium for dermatophytes product no. 103N natural lot no. 109 was significantly different from the other media in that lower counts were obtained.