[Rare endocarditis due to Abiotrophia defectiva. Case report and literature review]

Endocarditis by Abiotrophia defectiva is rare but associated with high rates of complications and mortality. The microbiological identification is challenging. Two cases without preexisting valvulopathy and one case with mitral-aortic involvement are described in the literature. A case of this subacute form of endocarditis, with normal mitral and aortic valves, is reported. Surgery was necessary, and mitral repair and aortic homograft implantation were performed with good 3-month results. In case of subacute endocarditis, especially when etiology is difficult to detect, Abiotrophia defectiva should be suspected.