Dermatophyte test medium (DTM) is a specialized agar used in medical mycology. It is based on Sabouraud's dextrose agar with added cycloheximide to inhibit saprotrophic growth, antibiotic to inhibit bacterial growth, and phenol red a pH indicator.
Dermatophyte test medium (DTM) serves the same purpose in medical mycology that specialized agars do. It is based on Sabouraud's dextrose agar with cycloheximide for saprophytic inhibition, an antibiotic to prevent bacterial growth, and phenol red as a pH indicator.