RGD uses the Human Disease Ontology (DO, https://disease-ontology.org/) for disease curation across species. RGD automatically downloads each new release of the ontology on a monthly basis. Some additional terms which are required for RGD's curation purposes but are not currently covered in the official version of DO have been added. As corresponding terms are added to DO, these custom terms are retired and the DO terms substituted in existing annotations and subsequently used for curation.
A primary immunodeficiency disease characterized by onset of chronic mucocutaneous candidiasis in the first years of life and lack of cellular responses to stimulation with certain IL17 isoforms that has_material_basis_in homozygous or compound heterozygous mutation in IL17RA on chromosome 22q11.1. (DO)