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Case Reports
. 2023 Oct 1;62(19):2919-2922.
doi: 10.2169/internalmedicine.1141-22. Epub 2023 Feb 22.

First Case Report of Peritoneal Dialysis-associated Peritonitis Caused by Lysinibacillus sphaericus

Teruhisa Kinoshita  1 , Shoko Sahara  1 , Tomomi Amano  2 , Masashi Ito  3 , Takashi Sakakibara  1 , Norio Takimoto  1 , Yukari Osada  4 , Keisuke Oka  5
Affiliations
Case Reports

First Case Report of Peritoneal Dialysis-associated Peritonitis Caused by Lysinibacillus sphaericus

Teruhisa Kinoshita et al. Intern Med. .

Abstract

We herein report a case of peritoneal dialysis-associated peritonitis caused by Lysinibacillus sphaericus in a 40s-year-old patient. Treatment was initiated with intermittent intraperitoneal cefazolin and ceftazidime. Later, both peritoneal dialysate and blood cultures detected L. sphaericus, so the antibiotic was changed to ampicillin (ABPC). The patient was treated with a combination of intraperitoneal intermittent and intravenous ABPC for 7 days, followed by 14 days of amoxicillin. The patient experienced no adverse events and no recurrence for 30 days. The patient had four dogs, and the infection was deemed likely to have been caused by environmental contamination and inadequate catheter replacement.

Keywords: Lysinibacillus sphaericus; peritoneal dialysis; peritonitis.

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Conflict of interest statement

The authors state that they have no Conflict of Interest (COI).

Figures

Figure.
Figure.
Gram stain findings for each culture test. (a) Blood culture subculture ×1,000. (b) Blood culture colony ×1,000. (c) Peritoneal dialysate culture colony ×1,000.
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