Two cases of PD-related peritonitis caused by Micrococcus species

Abstract

We report two cases of peritoneal dialysis (PD)-related peritonitis caused by Micrococcus species. [Patient 1] A 61-year-old male had been on PD due to diabetic kidney disease since November 2017. Eleven months after the initiation of PD, he was diagnosed with PD-related peritonitis and was treated with antibiotics. Since Micrococcus species were cultured from the dialysis effluent, we changed the antibiotics based on drug sensitivity considerations. The patient recovered and was discharged on the 22nd hospital day. Twelve days later, he exhibited signs of PD-related peritonitis again, and was treated with vancomycin. However, his symptoms did not improve, and the PD catheter was removed on the 56th day. He did not present with any further symptoms. [Patient 2] A 64-year-old male had been on PD due to diabetic kidney disease since July 2018. Eight months after the initiation of PD, he developed PD-related peritonitis and was treated with antibiotics. Micrococcus species were cultured from the dialysis effluent. His condition improved, and he was discharged on the 16th hospital day. He did not show any signs of recurrence. In summary, PD-related peritonitis due to Micrococcus species is extremely rare. Since intractable peritonitis can occur, removing the PD catheter should be considered.