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J Vet Cardiol. 2008 Dec;10(2):141-5. doi: 10.1016/j.jvc.2008.07.001. Epub 2008 Nov 25.

Listeria associated mural and valvular endocarditis in an alpaca.

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  • 1Department of Clinical Sciences, Oregon State University, College of Veterinary Medicine, Corvallis, OR 97330, USA.


An alpaca presented for emergency evaluation of respiratory distress. Physical examination revealed weakness, pyrexia, and a grade V/VI left apical holosystolic murmur. Initial thoracic examination and radiographs were consistent with left sided congestive heart failure. Blood cultures, echocardiographic evaluation, and necropsy findings established a diagnosis of bacterial endocarditis associated with a Listeria monocytogenes infection. Left ventricular endocarditis is uncommon in ruminants, and to the authors' knowledge there are no other reports of L. monocytogenes being the causative agent in an alpaca.

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