Demodex folliculorum (D. folliculorum), found in the pilosebaceous unit, is the most common ectoparasite of humans. Various clinical forms such as pustular folliculitis, papulopustular scalp ...

So reliant is D. folliculorum on humans for their survival, research suggests, that the microscopic mites are in the process of evolving from an ectoparasite into an internal symbiont – and one ...