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 plague that results_in infection located_in lymph node producing a bubo, which is an inflamed, necrotic, and hemorrhagic lymphoid tissue. The infection has_symptom enlarged, tender lymph nodes, has_symptom fever, has_symptom chills and has_symptom prostration. (DO)