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 viral infectious disease that is a hemorrhagic fever, has_material_basis_in Kyasanur forest disease virus, which is transmitted by Haemaphysalis spinigera tick bite. The infection has symptom fever, has symptom headache, has symptom stiffness of the neck, has symptom severe muscle pain, has symptom cough, has symptom dehydration, and has symptom bleeding problems. (DO)