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Cerebellar abscesses, infective endocarditis and bacteraemia due to a rare pathogen: Streptococcus constellatus

Rafael García Carretero1

  • 1Hospital Universitario de Mostoles, Mostoles, Madrid, Spain.

BMJ Case Reports
|September 3, 2017
PubMed

Insights

Streptococcus constellatus, typically a normal flora, rarely caused infective endocarditis and cerebellar abscesses in a patient with colorectal cancer. This case highlights an unusual presentation of S. constellatus bacteraemia.

Area of Science:

  • Infectious Diseases
  • Neurology
  • Cardiology

Background:

  • Intracranial infections arise from contiguous spread or hematogenous dissemination.
  • Streptococcus constellatus, a commensal bacterium, typically causes localized infections and rarely infective endocarditis (IE) or brain abscesses.

Observation:

  • A patient with a colorectal tumor developed IE and cerebellar abscesses.
  • Blood cultures identified Streptococcus constellatus as the causative agent of bacteraemia.

Findings:

  • This case demonstrates an exceptionally rare instance of S. constellatus causing both IE and brain abscesses.
  • The patient's colorectal tumor may have served as the primary source for the S. constellatus bacteraemia.

Implications:

  • Highlights the potential for S. constellatus to cause severe systemic infections, including IE and brain abscesses.
  • Suggests a need for heightened awareness of S. constellatus in patients with unexplained bacteraemia, particularly those with underlying conditions like malignancy.
  • Underscores the importance of considering unusual pathogens in the differential diagnosis of brain abscesses and endocarditis.
Keywords:
General Practice / Family MedicineInfectious Diseases

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