|Spores of the Oidium anamorph of Microsphaera penicillata|
(Nees) Link (1824)
Oidium is a genus of Deuteromycetes, where traditionally most anamorphs of the order Erysiphales are included. Most of them are plant pathogens causing different forms of powdery mildew, for example:
Oidium albicans has been a parallel name of the yeast Candida albicans (not related to the powdery mildew).
Some other species of medical importance previously classified as Oidium include: