Prototheca wickerhamii is a ubiquitous green alga that does not have chlorophyll. It is widely present in the environment and is a rare cause of infection in humans (protothecosis) and most commonly presents as nodules of the skin. Most cases reported have a suppressed immune system (from drugs or disease). Infection usually results by direct traumatic inoculation.
Clade: Green Algae
Species: Prototheca wickerhamii