RT Journal Article SR Electronic T1 Endocarditis due to Actinobacillus actinomycetemcomitans of both a prosthetic valve and a native valve in the same patient JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 193 OP 195 VO 53 IS 2 A1 Wilson, John H. A1 Franco, Irving A1 Keys, Thomas F. YR 1986 UL http://www.ccjm.org/content/53/2/193.abstract AB A patient with Actinobacillus actinomycetemcomitans endocarditis, a rare cause of gram-negative endocarditis, is reported. This case is unique in that it is the onlyone in the literature with documented involvement of both prosthetic (aortic) and native (mitral) valves. The patient required surgical replacement of the aortic valve prosthesis and debridement of the mitral valve, as well as prolonged antibiotic therapy.