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 in infancy of recurrent bacterial infections and defective immune cell migration and chemotaxis primarily in neutrophils although other cell types may also be affected that has_material_basis_in homozygous or compound heterozygous mutation in the MKL1 gene on chromosome 22q13.1-q13.2. (DO)