Although it is primarily a disease in patients with congenital cardiac defects or rheumatic hearts, infective endocarditis can be seen in patients with no known heart defects. Streptococcus viridans and Staphylococcus aureus are the microorganisms most commonly seen in the etiology of infective endocarditis. A 9-year-old boy was brought to our clinic with the complaints of fever, cough and difficulty in breathing. The patient had the diagnosis of pneumonia and empyema. He was placed under thorax drainage for effusion and started on crystallized penicillin, chloramphenicol and ceftazidime treatment. On the fourth day of admission, he was still febrile, and a systolic cardiac murmur was heard at the mesocardium. Echocardiography revealed tricuspid valve endocarditis. Staphylococcus aureus was isolated from blood cultures taken on two different occasions. Therapy was changed to vancomycin and amikacin. Amikacin was stopped on the 10th day of therapy and vancomycin was continued for six weeks. The patient was discharged at the end of therapy and was placed under cardiologic follow-up. We report herein a case who was admitted to our clinic with pneumonia and was later diagnosed with tricuspid valve endocarditis due to Staphylococcus aureus.

Keywords: pnömoni, Staphylococcus aureus, trikuspit valve, endokarditi, pneumonia, staphylococcus aureus, tricuspid valve endocarditis