Update 2016-2018 of the Nationwide Danish Fungaemia Surveillance Study: Epidemiologic Changes in a 15-Year Perspective

Malene Risum, Karen Astvad, Helle Krogh Johansen, Henrik Carl Schonheyder, Flemming Rosenvinge, Jenny Dahl Knudsen, Rasmus Kroger Hare, Raluca Datcu, Bent Lowe Roder, Valeria Stanislavovna Antsupova, Lise Kristensen, Jan Berg Gertsen, Jens Kjolseth Moller, Esad Dzajic, Turid Snekloth Sondergaard, Maiken Cavling Arendrup*

*Corresponding author for this work

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Abstract

As part of a national surveillance programme initiated in 2004, fungal blood isolates from 2016–2018 underwent species identification and EUCAST susceptibility testing. The epidemiology was described and compared to data from previous years. In 2016–2018, 1454 unique isolates were included. The fungaemia rate was 8.13/100,000 inhabitants compared to 8.64, 9.03, and 8.38 in 2004–2007, 2008–2011, and 2012–2015, respectively. Half of the cases (52.8%) involved patients 60–79 years old and the incidence was highest in males ≥70 years old. Candida albicans accounted for 42.1% of all isolates and Candida glabrata for 32.1%. C. albicans was more frequent in males (p = 0.03) and C. glabrata in females (p = 0.03). During the four periods, the proportion of C. albicans decreased (p < 0.001), and C. glabrata increased (p < 0.001). Consequently, fluconazole susceptibility gradually decreased from 68.5% to 59.0% (p < 0.001). Acquired fluconazole resistance was found in 4.6% Candida isolates in 2016–2018. Acquired echinocandin resistance increased during the four periods 0.0%, 0.6%, 1.7% to 1.5% (p < 0.0001). Sixteen echinocandin-resistant isolates from 2016–2018 harboured well-known FKS resistance-mutations and one echinocandin-resistant C. albicans had an FKS mutation outside the hotspot (P1354P/S) of unknown importance. In C. glabrata specifically, echinocandin resistance was detected in 12/460 (2.6%) in 2016–2018 whereas multidrug-class resistance was rare (1/460 isolates (0.2%)). Since the increase in incidence during 2004–2011, the incidence has stabilised. In contrast, the species distribution has changed gradually over the 15 years, with increased C. glabrata at the expense of C. albicans. The consequent decreased fluconazole susceptibility and the emergence of acquired echinocandin resistance complicates the management of fungaemia and calls for antifungal drug developmen
Original languageEnglish
Article number491
JournalJournal of Fungi
Volume7
Issue number6
Number of pages16
ISSN2309-608X
DOIs
Publication statusPublished - 19. Jun 2021

Keywords

  • Candida
  • candidaemia
  • candidiasis
  • resistance
  • echinocandin
  • mutation
  • epidemiology

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