Acariasis is a term for a rash, caused by mites, sometimes with a papillae (pruritic dermatitis), and usually accompanied by severe itching and creepy-crawly sensations. Most of the mites which cause this affliction to humans are from the order Acari, hence the name Acariasis. The entire taxonomic classification to order would be:
At the order level, there is still substantial argument among researchers as to how to categorize Acari. Some call it a subclass, others a superorder. Acarina (See the Taxonomy section)
Medical doctors and Dermatologists can still misdiagnose this rash as many are unfamiliar with parasitism, not trained in it, or if they do consider it, can't see the mites.
Reports exist of human infestation by Androlaelaps casalis, Dermanyssus gallinae, Ornithonyssus bacoti, Ornithonyssus bursa, Ornithonyssus sylviarum, and Pyemotes tritici, all mites previously believed not to prey on humans.
According to personal accounts found at the above referenced site, Acariasis can cause great disruption to the lives of those afflicted.