Camelidae and Cervidae Idiopathic Hyperkeratosis Study Guide

Overview and Clinical Importance

Idiopathic hyperkeratosis (commonly called munge in New World Camelids) represents one of the most perplexing and commonly encountered dermatologic conditions in llamas and alpacas. This hyperkeratotic skin disorder is characterized by thickening of the stratum corneum, resulting in crusting, scaling, and alopecic lesions that can significantly impact animal welfare, fiber quality, and show appearance. The condition encompasses several related syndromes including zinc-responsive dermatosis, idiopathic necrolytic neutrophilic hyperkeratosis (INNH), and focal perioral/perinasal dermatitis.

For cervids (deer, elk, moose), true idiopathic hyperkeratosis similar to camelid munge is not a recognized clinical entity. However, cervids experience various hyperkeratotic skin conditions secondary to ectoparasitic infestations (demodectic mange, sarcoptic mange), bacterial infections (dermatophilosis), and viral diseases (cutaneous fibromas). Understanding these differential diagnoses is crucial for the NAVLE examination.

Camelid Skin Anatomy and Unique Characteristics

Understanding camelid skin physiology is essential for diagnosing and treating hyperkeratotic conditions. New World Camelids have unique dermatologic features that affect disease presentation and treatment response.