Pediatric Candidemia Epidemiology and Morbidities

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Abstract
Background: Candidemia is the most frequent pediatric fungal infection, but incompletely elucidated in population-based settings. We performed a nationwide cohort study including all pediatric patients with candidemia in Denmark from 2004 to 2014 to determine age, incidence, species distribution, underlying diseases, patient management and outcomes. Methods: All candidemia episodes were identified through the active nationwide fungemia surveillance program. Susceptibility testing followed the EUCAST E.Def 7 (European Committee on Antifungal Susceptibility Testing, Edition Definitive) reference method. χ2 test, Fisher exact test and Venn diagrams were used for statistical analyses. Results: One hundred fifty-three pediatric patients (≤ 15 years) with 158 candidemia episodes were identified. The overall annual incidence rate was 1.3/100,000 population, higher for neonates (5.7/100,000 live births) and low birth weight neonates (103.8/100,000 live births). From 2004 to 2009 to 2010 to 2014, the proportion of Candida albicans decreased from 74.4% to 64.7%, whereas fluconazole resistance increased from 7.8% to 17.7%. Virtually all patients had at least 1 underlying disease (98.6%) and multimorbidity was common (43.5%, ≥2 underlying diseases). Underlying diseases differed by age with heart malformations and gastrointestinal disease prevalent in children younger than 3 years. The overall 30-days mortality was 10.2% and highest for neonates (17.1%). Mortality increased from 2004 to 2010 to 2014, driven by an increase among older children. Conclusion: This first nationwide epidemiologic study of pediatric candidemia confirmed a high incidence among neonates and a substantial burden of comorbidities. Moreover, an increasing proportion of fluconazole resistant nonalbicans species was observed. Our findings underline the importance of choosing correct treatment and continuous surveillance of pediatric candidemia.

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