A post-bacterial multisystem inflammatory disease occurring as a post-infectious, nonsuppurative sequela of untreated streptococcus pyogenes (Group A streptococcus [GAS]) pharyngitis, and mainly occurs in individuals aged 5 to 15 years. The most common presenting signs are fever, migratory polyarthritis and carditis. The disease is MONDO_0017767 (rheumatic fever). Also known as: ARF, RHF - rheumatic fever, acute rheumatic fever.