Microsporum canis, macroscopically, is a white to yellowish colony with a velvety/powdery texture approximately 3 to 9 cm in diameter. When the petri plate is flipped upside down, the colony ranges from being burnt orange to yellow depending on what strain of Microsporum canis may be growing on the plate(1).
Microsporum canis, microscopically, produces septate hyphae along with both macroconidia and microcondia. The Macroconidia are fusiform spindle-shaped approximately 35-125 X 7-20 micrometers in size. The macroconidia have thin septate walls within them with approximately 6-15 cells (1). The macroconidia’s outer walls tend to be very thick and rough. The microconidia also produced by this species are clavate and 4-7 X 2.5-3.5 micrometers in size (1).