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SummaryBackground: Aspergillus infections of pacing systems are extremely uncommon, and most cases reported are characterized by an aggressive behavior that may lead to death of the patient.Hypothesis: The study was undertaken to assess the incidence of pacemaker infection due to Aspergillus in a defined population.Methods: A retrospective review of the case histories of all patients who underwent pacemaker implantation in the reference center for a defined population over a 13-year period was undertaken. A literature review of pacemaker infections due to Aspergillus was conducted.Results: Of the 1,321 patients who required pacemaker implantation at Hospital Xeral-Calde in the Lugo region of northwestern Spain, 38 suffered a pacemaker infection. A pacemaker pocket infection due to Aspergillus fumigatus was found in two patients. Both patients had a previous history of diabetes mellitus. Cultures from pacemaker pocket inflammatory fluid yielded positive results. Following pacemaker explantation and antifungal therapy, clinical improvement was achieved. A literature review showed another five cases of pacemaker infection due to Aspergillus. However, two peculiarities were found in our patients: In both cases an etiological diagnosis was achieved prior to surgery and, to the best of our

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