• Ryosuke Saiki, Tomohiro Murata, Kayo Tsujimoto, Fumika Tanaka, Daisuke Takahashi, Keiko Oda, Yosuke Hirabayashi, Kan Katayama, and Kaoru Dohi.
• Department of Cardiology and Nephrology, Mie University Graduate School of Medicine, Japan.
• Intern. Med. 2023 Jun 1; 62 (11): 163116331631-1633.

AbstractMicrococcus luteus can cause relapsing and refractory peritoneal dialysis infection because it leads to strong biofilm formation. A 69-year-old woman who had undergone peritoneal dialysis (PD) visited the emergency department complaining of cloudy peritoneal dialysate. She was initially given intraperitoneal cefazolin (1 g/day) and ceftazidime (1 g/day). Micrococcus luteus was detected in a culture test. Thus, ceftazidime was discontinued. She remained disease-free for 22 months until she developed PD-related peritonitis. We administered antibiotics for 21 days and thereafter identified 2 important clinical issues. Micrococcus species-related peritonitis can sometimes be cured without vancomycin. Furthermore, the provision of three weeks of sufficient treatment may be important.

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