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Updated: May 12, 2026

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Published on: December 18, 2010
Moraxella Catarrhalis peritonitis
Seyed-Ali Sadjadi1, Paz Obedoza, Pavan Annamarju
1Section of Nephrology, Jerry L Pettis Memorial Veterans Medical Center, Loma Linda University School of Medicine, Loma Linda, CA, U.S.A.
Peritonitis, a complication in peritoneal dialysis (PD), can lead to PD failure. This case highlights Moraxella Catarrhalis as a rare cause of PD peritonitis, emphasizing the need for prompt identification and treatment.
Area of Science:
- Nephrology
- Infectious Diseases
- Microbiology
Background:
- Peritonitis remains a significant complication for patients undergoing peritoneal dialysis (PD).
- While advances have reduced peritonitis incidence, Gram-positive and Gram-negative bacteria are common culprits.
- This report focuses on a rare case of peritonitis caused by Moraxella Catarrhalis.
Purpose of the Study:
- To report a rare case of Moraxella Catarrhalis peritonitis in a peritoneal dialysis patient.
- To review the diagnostic and therapeutic strategies for this uncommon cause of peritonitis.
Main Methods:
- A 56-year-old end-stage renal disease patient on PD presented asymptomatically with elevated peritoneal fluid white blood cell count.
- Identification of Moraxella Catarrhalis required two weeks and testing at two separate microbiology laboratories.
Main Results:
- The patient was diagnosed with peritonitis due to Moraxella Catarrhalis.
- Delayed identification of the causative organism impacted timely treatment initiation.
Conclusions:
- Peritonitis is a primary cause of peritoneal dialysis failure.
- Rapid identification of the causative pathogen is critical for effective and timely management of PD-associated peritonitis.
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