1698. Epidemiology and Antifungal Susceptibility of Candidemia Among Adult Patients at a Tertiary Care Hospital in South Korea During an 8-Year Period

Abstract Background Candidemia continues to contribute to significant morbidity and mortality in the hospital. This study aimed to evaluate the epidemiology and antifungal susceptibility at a tertiary care hospital in South Korea during an 8-year period. Methods Adult patients ≥19 years with candidemia at a tertiary care hospital in South Korea from 2006 to 2018 were reviewed, and cases of candidemia with antifungal susceptibility data were included for the analysis. Results There were 270 cases of candidemia with fluconazole susceptibility data from 2011 to 2018. Overall, fluconazole resistance rate of candidemia was 8.5%. Between period 1 (2011–2015) and period 2 (2016–2018), fluconazole resistance rate was significantly higher in the period 2 (14.3%) than in the period 1 (0.9%), P < 0.001. Among candidemia caused by different Candida spp., a significant increase of fluconazole-resistant C. parapsilosis candidemia was noted in the period 2 (12 out of 34 cases; 35.3%) when compared with the period 1 (0 out of 17 cases; 0.0%), P = 0.004. Although there was a trend of higher fluconazole resistance rate for candidemia caused by C. albicans (9.1% vs. 1.8%), C. tropicalis (2.7% vs. 0.0%), and C. glabrata (11.1% vs. 0.0%) in the period 2 than in the period 1, no statistical significance was observed. Echinocandin (caspofungin and micafungin) susceptibility data were available for 211 cases of candidemia from 2013 to 2018. There were no cases of caspofungin-resistant candidemia except for 2 cases of C. utilis candidemia. However, there were 9 cases of micafungin-resistant candidemia (1 case of C. tropicalis candidemia out of 51 cases [2.0%], 6 cases of C. glabrata candidemia out of 18 cases [33.3%], and 2 cases of C. utilis candidemia out of 2 cases [100.0%]). Micafungin-resistant C. tropicalis and C. glabrata candidemia cases were susceptible to caspofungin. Conclusion A significant increase of fluconazole-resistant candidemia in recent years was noted, particularly among C. parapsilosis candidemia cases. Echinocandin resistance among candidemia cases is rare. However, close monitoring needs to be considered for the possible emergence of differential echinocandin resistance. Disclosures All authors: No reported disclosures.