A case of Neisseria elongata subsp. nitroreducens endocarditis with a favourable course is presented. Dental foci were involved as the infective origin. Only conservative therapy was performed for 6 weeks; no complications were registered in 3 months of follow-up. The other 12 cases with similar aetiology communicated in the past 30 y were reviewed.

Four cases are described of Aerococcus viridans endocarditis with favorable outcome, focusing on the clinical picture. Extracardiac findings (e.g. neurological, renal, musculoskeletal, intra-abdominal) in infective endocarditis (IE) have been recognized more frequently in recent years, and may delay the diagnosis and have a negative influence on the prognosis. Aerococcus viridans, a very rare microorganism causing invasive infections, has been associated