Abstract
The coronavirus disease 2019 (COVID-19) pandemic has influenced hospital infection control practices. To evaluate the impact of the COVID-19 pandemic on healthcare-associated infections (HAIs) in intensive care units (ICUs). A retrospective analysis using data from the Korean National Healthcare-Associated Infections Surveillance System was conducted. Comparisons between incidence rates and micro-organism distributions of bloodstream infection (BSI), central line-associated bloodstream infections (CLABSI), catheter-associated urinary tract infection (CAUTI), and ventilator-associated pneumonia (VAP) before and during the COVID-19 pandemic were performed according to hospital size. The incidence rate of BSI significantly decreased during the COVID-19 pandemic compared to the pre-COVID-19 period (1.38 vs 1.23 per 10,000 patient-days, relative change -11.5%; P < 0.001). The incidence rate of VAP (1.03 vs 0.81 per 1000 device-days, relative change -21.4%; P < 0.001) significantly decreased during the COVID-19 pandemic compared to the pre-COVID-19 period, whereas rates of CLABSI (2.30 vs 2.23 per 1000 device-days; P= 0.19) and CAUTI (1.26 vs 1.26 per 1000 device-days; P= 0.99) were similar between the two periods. The rates of BSI and CLABSI significantly increased during the COVID-19 pandemic compared to the pre-COVID-19 period in large-sized hospitals, whereas these rates significantly decreased in small-to-medium-sized hospitals. The rates of CAUTI and VAP significantly decreased in small-sized hospitals. There were no significant changing trends in the rates of multidrug-resistant pathogens isolated from patients with HAI between the two periods. The incidence rates of BSI and VAP in ICUs decreased during the COVID-19 pandemic compared to the pre-COVID-19 period. This decrease was mainly seen in small-to-medium-sized hospitals.
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