ODC1 and infective endocarditis: S.lugdunensis is the only species that gives a positive result with dual PYR (pyrrolidonyl arylamidase) and ODC (ornithine decarboxylase) tests among CNS species.3Yen Liu et al.6, in their review published in 2010, mentioned that S.lugdunensis had a serious infective endocarditis effect and they advised to use PYR and ODC tests for identification of this bacterium.A study reported by Celebi et al.7 referred that early cardiac surgery should always be considered in the treatment of infective endocarditis due to S.lugdunensis.