subacute bacterial endocarditis (MONDO_0006981, a Monarch Disease Ontology id) can be described as follows. Subacute inflammation of the endocardium. Streptococcus viridans is the usual etiologic agent of subacute bacterial endocarditis. The distinction between "acute" and "subacute" endocarditis has traditionally been made based on the pathogenic organism and clinical presentation. Also known as: SBE, SBE - Subacute bacterial endocarditis, Subacute bacterial endocarditis, Subacute endocarditis, lenta, endocarditis lenta.