26 Jun 2022

Emericella nivea (Anamorph: Aspergillus niveus)

A slow growing fungus that produces a white to pale yellow colony within fourteen days, when incubated at 25oC (77oF). Light yellow cleistothecia (a round fruiting body without an opening that contains randomly placed asci containing ascospores) are occasionally produced. Ascospores are light yellow, smooth and have inconspicuous equatorial ridges. Yellow specialized thick-walled cells (Hülle cells) are present. In culture, the anamorph form is also present. It has worldwide distribution and can be isolated from soil, desert soil, and the rhizospheres of groundnuts and barley. It does not cause human infections, but can cause infections in young ducklings who have eaten contaminated