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The page below is a sample from the LabCE course Mycology: Yeasts and Dimorphic Pathogens. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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The yeast-like colonies seen growing on the blood agar surface in the upper image on the right are lipid-dependent and grow only where olive oil had been applied. This is characteristic of the yeast-like organism, Malassezia furfur, which causes a superficial skin infection known as tinea versicolor. The lower image is a lactophenol blue mount made from a portion of the colony seen on the blood agar plate.
Malassezia species, M. furfur and M.pachydermatis, may also cause catheter related sepsis in patients receiving intravenous lipids.