Camelidae and Cervidae Foot Mites (Chorioptes) Study Guide

Overview and Clinical Importance

Chorioptic mange (also called foot mange, leg mange, or itchy heel) is a common ectoparasitic skin disease caused by non-burrowing surface mites of the genus Chorioptes. These mites are of significant veterinary importance in camelids (llamas, alpacas, guanacos, vicunas) and cervids (deer, elk, reindeer, moose). Unlike Sarcoptes mites that burrow into the epidermis, Chorioptes mites live on the skin surface and feed on epidermal debris, causing a generally milder but persistent form of mange that can be challenging to eradicate.

In South American camelids (SACs), chorioptic mange is increasingly recognized as the most common ectoparasite infestation, particularly affecting the interdigital spaces and lower limbs. In cervids, Chorioptes texanus specifically infests the ear canals of reindeer, while Chorioptes bovis has been documented in elk and moose populations.

Etiology and Taxonomy

Classification

Chorioptes mites belong to the following taxonomic classification: