A case of CAPD peritonitis in which <i>Streptococcus vestibularis</i> was found to be the causative agent by MALDI‒TOF MS

Abstract

vestibularis, PD peritonitis 〈Abstract〉 An 81 year old male, who was on continuous ambulatory peritoneal dialysis (CAPD), developed abdominal pain and cloudy peritoneal fluid. His white blood cell count was 17,510 cells/μL, his C reactive protein level was 1.36 mg/dL, and the white blood cell count of his peritoneal fluid was 16,670 cells/μL, suggesting acute peritonitis. Empiric therapy ameliorated his symptoms. A microbiological examination of the peritoneal fluid using matrix assisted laser desorption/ionization-time of flight mass spectrometry (MALDI TOF MS) revealed Streptococcus vestibularis. Herein, we present the first Japanese case report of peritonitis due to S. vestibularis related to CAPD.