The Shar-Pei is a type of dog breed known for its deep wrinkles and blue-black tongue. Although the Shar-Pei has been identified as a basal breed that predates the emergence of the modern breeds in the 19th century, the American Kennel Club recognized it as their 134th breed only in 1992. Compared to other breeds, Shar-Pei have an increased risk of developing atopic dermatitis, a chronic allergic skin disease. Dogs with allergic skin disease often get allergy-induced skin infections. Shar-Pei are also at an increased risk of demodicosis, a disease which happens when Demodex canis mites proliferate and cause skin irritation, inflammation and infection. Shar-Pei are also at an increased risk of demodicosis, a disease which happens when Demodex canis mites proliferate and cause skin irritation, inflammation and infection.