Infective endocarditis complicating rituximab (anti-CD20 monoclonal antibody) treatment in an SLE patient with a past history of Libman–Sacks endocarditis: a case for antibiotic prophylaxis?

Abstract
We report a 54 year old female whose successful treatment of cerebral lupus with rituximab was complicated by the development of streptococcus intermedius, on valves damaged by Libman-Sacks endocarditis more than 20 years previously.