Abstract Background and Aims Kocuria species, gram-positive actinobacteria, are typically found in the environment, on human skin and as oral flora. These microorganisms are considered saprophytes and non-pathogenic. They rarely cause infections. Patients generally have some compromise due to underlying conditions, including solid tumors, hematologic malignancies, or metabolic disorders. There are few cases in the literature of peritoneal dialysis-associated peritonitis due to these germs. Reports of exit site infections or tunnel infections are even rarer or doesn't exist. Method Retrospective description of 4 cases of exit site and/or tunnel infections due to Kocuria kristinae over a 3-year period in a single center. Results Four cases of exit site infection were evaluated, with an average age of 63.2 ± 8.8 years. Half of the patients were diabetic. No patient had a history of peritoneal dialysis-related infection. The dialysis modality for all patients was CAPD (Continuous Ambulatory Peritoneal Dialysis). All patients presented symptoms of exit site infection, such as erythema and purulent discharge, but none of them had peritonitis. Three cases were treated with quinolones, and one received linezolid. One case received two antibiotic treatment regimens without an adequate response, and tunnel infection developed, required the removal of the dialysis catheter and a change in modality to HD (hemodialysis). Conclusion Exit site infections due to Kocuria are extremely rare. Despite the absence of specific management guidelines, the response to treatment is usually adequate. Due to the theoretical ability to produce biofilm, Kocuria infections should be considered a potential risk for recurrence and refractory disease. To our knowledge, there are no reports of exit site infections due to Kocuria.
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