[A case of native valve infective endocarditis in an immunocompromised patient].

Infective endocarditis continues to be associated with high mortality, despite the medical and surgical therapeutic options available. Surgical intervention is indicated in cases of heart failure or uncontrolled infection and sometimes for the prevention of embolic phenomena. The authors present the case of a 56-year-old male patient, with fibro-calcific mitral-aortic valve disease, splenectomized and with recently relapsed Hodgkin's lymphoma, who was admitted with infective endocarditis due to Streptococcus dysgalactiae. On the thirtieth day of directed antibiotic therapy, the mitral vegetation showed a significant increase in size and mobility. Surgery was considered at this point. However, given the patient's clinical stability and laboratory results, it was decided to adopt a conservative approach and to extend antibiotic therapy. The vegetation had regressed considerably seven days later. Given this atypical vegetation behavior, with slower than usual regression for the causative agent, the authors suggest that antibiotic therapy should be extended in patients with some degree of immunosuppression.