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.
Hepatosplenic schistosomiasis refers to the major complication of chronic infection with Schistosoma mansoni, S japonicum and S mekongi, schistosomal portal hypertension. It is usually associated with enlargement of the liver and spleen, and reversible hepatosplenomegaly may occur in early infections. It is a chronic complication, which develops as a consequence of inflammatory response.