An immune system disease that is an overactive immune response of the body against substances and tissues normally present in the body resulting from an abnormal functioning of the immune system that results in the production of antibodies or T cell directed against the host tissues. [ ls:IEDB http://purl.obolibrary.org/obo/ECO_0007638 url:http://en.wikipedia.org/wiki/Autoimmune_disease ]
Synonyms: autoimmune hypersensitivity disease hypersensitivity reaction type II disease