Leech Infestation, also known as hirudiniasis, is related to active peptic ulcer disease and deficiency anemia. An important gene associated with Leech Infestation is ANKRD49 (Ankyrin Repeat Domain 49), and among its related pathways/superpathways are Collagen chain trimerization and Diseases of hemostasis. The drug Antioxidants has been mentioned in the context of this disorder. Affiliated tissues include salivary gland and skin, and related phenotypes are homeostasis/metabolism and neoplasm