Staphylococcus capitis prosthetic valve endocarditis: report of two rare cases and review of literature.

Staphylococcus epidermidis is the most common organism associated with prosthetic valve endocarditis. Staphylococcus capitis, a coagulase-negative Staphylococcus, is a rare cause of endocarditis. We report two cases of S.capitis prosthetic valve endocarditis, both involving prosthetic aortic valve and complicated by aortic root abscess. We also review the literature for this rare condition caused by this rare organism.