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You are here: Contents > 2018 > Volume 27 Number 2 March 2018 > ENDOCARDITIS > Capnocytophaga Canimorsus Endocarditis in a Patient With Prior Cardiac Surgery For Endocarditis

Capnocytophaga Canimorsus Endocarditis in a Patient With Prior Cardiac Surgery For Endocarditis

Ramsey GG Powell1, William DT Kent2, John M Conly3, Wilson W Chan4, Andrew Maitland2,5

1Faculty of Medicine, Memorial University of Newfoundland, St. Johns, NL, Canada
2Libin Cardiovascular Institute of Alberta, Division of Cardiac Surgery, Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Foothills Medical Centre, Alberta Health Services - Calgary and Area, Calgary, Alberta, Canada
3Section of Infectious Diseases, Department of Medicine, Cumming School of Medicine, University of Calgary, Foothills Medical Centre, Alberta Health Services- Calgary and Area, Calgary, Alberta, Canada
4Clinical Section of Microbiology, Calgary Laboratory Services, Calgary, Alberta, Canada
5Electronic correspondence: Andrew.maitland@ahs.ca

Endocarditis caused by zoonotic organisms has rarely been reported. Capnocytophaga canimorsus is a fastidious, Gram-negative bacillus found in the normal oral flora of dogs and cats. We present here an unusual case of C. canimorsus endocarditis involving a mechanical prosthetic mitral valve and tricuspid valve containing an annuloplasty ring, in the context of previous cardiac surgery for endocarditis. The patient died 6 months following repeat surgery due to sepsis unrelated to the procedure. The epidemiology of C. canimorsus endocarditis is not well established and presentation is variable. The infection may be acute or subacute and symptoms are nonspecific. The incidence of C. 

canimorsus may be underreported due to its fastidious nature, the large population at risk of infection and nonspecific presentation which may be inconsistent with conventional diagnostic criteria. This case highlights the potential of C. canimorsus to cause prosthetic valve endocarditis as well as the subacute, non-specific presentation of this rare disease.

Video 1: 3D Echocardiogram prior to second surgery demonstrating mechanical prosthetic mitral valve, adjacent localized cavity and associated intracavitary blood flow.

The Journal of Heart Valve Disease 2018;27:178-181


Capnocytophaga Canimorsus Endocarditis in a Patient With Prior Cardiac Surgery For Endocarditis

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