DTM (Dermatophyte Test Medium) Agar, plastic HardyFlask. Dermatophyte Test Medium (DTM) is a selective and differential medium recommended for the cultivation and isolation of pathogenic dermatophytic fungi. HardyFlask Features: *Lightweight - For reduced shipping cost and less chance of breakage. *Stackable - For increased conservation of space, both in incubator and refrigerator. No special storage racks are needed. *Interlocking - For increased stability when incubating and transporting. *Large surface area. For the inoculum. Almost double the area! better isolation of colonies. *Slanted neck - Facilitates easy inoculation of the flat media surface. *Improved clarity - For better visibility of the growing culture, both front and back. UOM: 20/PK.