A "cat"-astrophic case of Bartonella infective endocarditis causing secondary cryoglobulinemia: a case report.

Background: Culture-negative infective endocarditis (IE) constitutes approximately 10% of all cases of IE. Bartonella endocarditis is a common cause of culture-negative endocarditis and is associated with a high mortality rate. To date, no cases of Bartonella IE has been reported in association with cryoglobulinemia in the UK.