WordNet
subacute bacterial endocarditis
n. a chronic bacterial infection of the endocardium and heart valves; symptoms develop slowly
Wikipedia
Subacute bacterial endocarditis
Subacute bacterial endocarditis (also called endocarditis lenta) is a type of endocarditis (more specifically, infective endocarditis). Subacute bacterial endocarditis can be considered a form of type III hypersensitivity.