Infective endocarditis due to a rare pathogen, Streptococcus constellatus, in a patient with gingivitis: A case report and review of the literature

Abstract

<jats:title>Abstract</jats:title><jats:p>A 78-year-old Japanese man with a 5-day history of fever (∼38°C) and decreased appetite was admitted to our hospital. Transesophageal echocardiography revealed aortic valve vegetation. Streptococcus constellatus was detected from a blood culture. An antibiotic sensitive to this strain was administered for 6 weeks, and the patient has been well for 6 months without any sign of relapse. A review of all documented cases of infective endocarditis due to S. constellatus revealed nonspecific initial symptoms, especially coughing, and complications of abscess formation and septic embolisation. Clinicians should carefully consider the choice of antibiotic agents in the treatment of infective endocarditis due to S. constellatus, because penicillin-resistant strains have been documented in some cases.</jats:p>

The Clinical View on Streptococcus anginosus Group – Opportunistic Pathogens Coming Out of Hiding

“…Infective endocarditis due to S. constellatus revealed non-specific initial symptoms, especially coughing, and complications of abscess formation and septic embolization. The choice of antibiotic agent for the treatment of infective endocarditis due to S. constellatus should receive special attention, because penicillin resistant strains have been documented in some cases ( Yoshino et al, 2013 ).…”

First Case of Infective Endocarditis With Streptococcus equinus in an Immunocompetent Patient in North America: A Case Report and Review of Literature

“…are mainly responsible for IE. Among the Streptococcus species, Streptococci viridans is the main cause of IE, with about 17% of cases [ 2 ]. Streptococcus equinus ( S. equinus ) has been rarely noted to cause IE [ 3 ].…”