Candida auris outbreak at a tertiary care hospital during the COVID-19 pandemic

Background Candida auris (C. auris) is a fungal pathogen that has the potential for environmental persistence leading to outbreaks in healthcare settings. There has been a worldwide surge in C. auris outbreaks during the COVID-19 pandemic. In this report, we describe an outbreak of C. auris, its control, patient outcomes, and lessons learned. Methods The outbreak occurred in a 600-bed adult academic tertiary care hospital. Contact tracing was initiated immediately after identification of the index case and surveillance testing for C. auris was obtained from patients who were exposed to the index case. Infection prevention measures were closely followed. Results A total of 560 cultures were performed on 453 unique patients between August 2021 and December 2021. Of those, 31 cultures (5.5%) were positive for C. auris; 27 (87.1%) were colonized with C. auris, while 4 patients developed a clinical infection (12.9%). The secondary attack rate was 6.8% (31/453). The 30-day all-cause mortality rate for all patients who tested positive for C. auris was 9.7%. Discussion C. auris can cause protracted outbreaks that result in colonization and invasive infections. Multidisciplinary work to improve adherence to infection prevention measures as well as targeted admission screening are essential to limit outbreaks.