Clinical Significance of Rare Non-Candida Yeasts in Pediatric Fungemia: A Retrospective Analysis
Abstract
Background: Fungemia caused by non-Candida yeasts is rare but represents an emerging clinical problem that remains less well recognized and studied. These organisms often exhibit intrinsic resistance or reduced susceptibility to commonly used empirical antifungal agents, such as fluconazole and echinocandins. This poses significant challenges for empirical antifungal therapy.
Objectives: To describe the clinical characteristics, antifungal treatments, and outcomes of pediatric patients with bloodstream infections due to non-Candida yeasts and to summarize the antifungal susceptibility profiles of available isolates.
Methods: This retrospective study reviewed all episodes of fungemia caused by non-Candida yeasts at a tertiary pediatric center between 1 January 2020 and 1 September 2025.
Results: Of the 139 yeast-related fungemia episodes identified during the study period, five (3.6%) were caused by non-Candida yeasts: three by Trichosporon spp., one by Rhodotorula mucilaginosa, and one by Magnusiomyces clavatus (formerly Saprochaete clavatus). Two cases occurred as breakthrough infections under ongoing antifungal treatment. Empirical antifungal treatments most often included amphotericin B, fluconazole, or echinocandins. The median time to species-level identification after the first positive culture result was six days (range 4-7), highlighting a considerable delay that may critically affect clinical management. Overall mortality was 40%, while attributable mortality due to…
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