Oral Antimicrobial Treatment vs. Outpatient Parenteral for Infective Endocarditis

Inclusion Criteria: * Left-sided native or prosthetic infective endocarditis based on the modified Duke criteria infected with one of the following nonresistant microorganisms: Non-resistant streptococci and other gram positive cocci,e.g., Granulicatella and Abiotrophia; Enterococcus faecalis; Staphylococcus aureus;coagulase-negative staphylococci and HACEK group. * Male or female 18 years old or older. * 10 days or more of appropriate parenteral antibiotic treatment overall and at least one week of appropriate parenteral treatment after value surgery. * Temperature inferior to 38ºC for more than two days. 5. C-reactive protein dropped to \<25% of peak value or \<20 mg/l, and white blood cell count \<15x10\^9/l during antibiotic treatment * Transthoracic / transesophageal echocardiography performed within 48 hours of randomization Exclusion Criteria: * Body mass index \>40 * Concomitant infection requiring intravenous antibiotic therapy * Inability to give informed consent to participation * Suspicion of reduced absorption of oral treatment due to abdominal disorder * Microorganisms with no oral combinations for treatment (two active antibiotics of different families) * Any immunosuppressive disease or any medical condition at the discretion of the investigator that may preclude oral or OPAT therapy * No family or appropriate home support * Reduced compliance * Women of childbearing potential with a positive pregnancy test, or participants (male or female) who wish to plan a pregnancy during the trial period * Women in lactancy period