Infection control in two COVID-19 patients with evidence for Candida Auris, Germany

ABSTRACT

Introduction: Candida auris is an emerging pathogen in hospital infections that can present multi-resistance to antifungals and causes outbreaks. Objectives: The aim is to describe the infection prevention and control for C. auris. Methods: Identification of yeast isolates was performed by MALDITOF and confirmed by ITS sequencing. Infection control measures were decided by a multi-disciplinary ad hoc outbreak panel. Patient screening once or twice a week and extensive environmental testing for C. auris was conducted. Results: C. auris was isolated from a urine sample of a COVID-19 patient who had been transferred from an Egyptian hospital to our COVID-19 intensive care unit (ICU). Immediately, disinfection routine was changed, because C. auris is insensitive to quaternary ammonium compounds. The patient had already been isolated from admission due to evidence of 4MRGN Klebsiella pneumoniae. Six days after confirmation of C. auris in the index patient, a second COVID-19 patient was identified with C. auris. Both patients were isolated in a separated area of the ICU. Strict hygiene and infection control measures were implemented promptly. In the nine weeks from initial confirmation of C. auris and discharge of the two affected patients, C. auris was repeatedly identified in clinical samples of them. However, it was not detected in any other patient on the ICU (n = 7) or discharged from it (n = 13) nor in any environmental sample (n = 129). The two C. auris patients had been intubated using the same video laryngoscope seven days apart. Although the equipment and the spatulas had been manually reprocessed using chlorine dioxide-soaked wipes they might serve as transmission vehicle. Therefore, it was recommended to use disposable spatulas. Conclusion: A rapid confirmation of a C. auris in the lab and the immediate implementation of adequate hygiene measures at the ward are crucial in order to prevent transmission of C. auris to other patients.