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Journal of Clinical Microbiology, April 2004, p. 1590-1595, Vol. 42, No. 4
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.4.1590-1595.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Endocarditis with Ruptured Cerebral Aneurysm Caused by Cardiobacterium valvarum sp. nov.

Xiang Y. Han,1* Michelle C. Meltzer,1 Joan T. Woods,1 and Victor Fainstein2

Section of Clinical Microbiology, The University of Texas M. D. Anderson Cancer Center,1 Section of Infectious Diseases, The Methodist Hospital, Houston, Texas 770302

Received 6 August 2003/ Returned for modification 10 September 2003/ Accepted 21 December 2003

A fastidious gram-negative bacterium was isolated from the blood of a 37-year-old man who had insidious endocarditis with a sudden rupture of a cerebral aneurysm. Characterization of the organism through phylogenetic and phenotypic analyses revealed a novel species of Cardiobacterium, for which the name Cardiobacterium valvarum sp. nov. is proposed. C. valvarum will supplement the current sole species Cardiobacterium hominis, a known cause of endocarditis. Surgeries and antibiotic treatment cured the patient's infection and associated complications. During cardiac surgery, a congenital bicuspid aortic valve was found to be the predisposing factor for his endocarditis.

* Corresponding author. Mailing address: Section of Clinical Microbiology, The University of Texas M. D. Anderson Cancer Center, Unit 84, 1515 Holcombe Blvd., Houston, TX 77030. Phone: (713) 792-3515. Fax: (713) 792-0936. E-mail: xhan{at}mdanderson.org.

Journal of Clinical Microbiology, April 2004, p. 1590-1595, Vol. 42, No. 4
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.4.1590-1595.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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