| http://www.w3.org/ns/prov#value | - It is invariably fatal if untreated.Most affected patients have prosthetic heart valves or valvular abnormalities, particularly aortic bicuspid valves, mitral valve prolapse, and moderate mitral insufficiency.Approximately 40% of persons with a known valvulopathy with an acute Q fever diagnosis subsequently develop infective endocarditis.The second most common form of chronic Q fever is infection
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