[Acute abdomen with findings of pneumococcal peritonitis]

Marlene Aagaard Hansen1, Michelle Meier1

  • 1Mave- og Tarmkirurgisk afdeling, Regionshospitalet Randers.

Ugeskrift for Laeger
|October 1, 2025
PubMed

Insights

A rare case of Streptococcus pneumoniae peritonitis occurred in a young, healthy man. Prompt antibiotic treatment led to rapid recovery, emphasizing the importance of pneumococcal vaccination.

Area of Science:

  • Medicine
  • Infectious Diseases
  • Microbiology

Background:

  • Peritonitis is inflammation of the peritoneum, often caused by bacterial infection.
  • Streptococcus pneumoniae is a common cause of pneumonia and meningitis, but rare cause of peritonitis.
  • Pneumococcal peritonitis typically affects individuals with liver disease or nephrotic syndrome.

Purpose of the Study:

  • To report a rare case of spontaneous pneumococcal peritonitis in a young, healthy adult.
  • To discuss the clinical presentation, diagnosis, and management of this unusual manifestation of pneumococcal disease.
  • To highlight the importance of considering pneumococcal infection in unexplained peritonitis, even in immunocompetent individuals.

Main Methods:

  • Case report of a 20-year-old male presenting with abdominal pain and fever.
  • Clinical examination revealed signs of peritoneal irritation.
  • Diagnostic workup included blood tests and blood cultures; laparoscopy was performed.
  • Treatment involved antibiotics and subsequent pneumococcal vaccination.

Main Results:

  • The patient presented with symptoms and signs consistent with peritonitis.
  • Laparoscopy confirmed purulent peritonitis of unknown etiology.
  • Blood cultures identified Streptococcus pneumoniae as the causative agent.
  • The patient showed rapid clinical improvement following antibiotic therapy.

Conclusions:

  • This case represents a rare instance of pneumococcal peritonitis in an otherwise healthy young adult.
  • Spontaneous bacterial peritonitis due to Streptococcus pneumoniae can occur in individuals without traditional risk factors.
  • Early diagnosis and appropriate antibiotic treatment are crucial for favorable outcomes.
  • Pneumococcal vaccination should be considered in patients recovering from pneumococcal peritonitis.

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