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Background Korean Antimicrobial Surveillance System (Kor-GLASS) was established in 2016, which is compatible with the Global Antimicrobial Resistance Surveillance System launched by WHO. Here, we report a one-year assessment of Kor-GLASS in 2017, focusing on the antimicrobial resistance of urine isolates. Methods Non-duplicated clinical isolates of E. coli and K. pneumoniae recovered from urine cultures were collected from 8 sentinel hospitals. Demographic information, infection origin (hospital origin or community origin), and admission type were investigated. Bacterial species were confirmed using a matrix-assisted laser desorption/ionization time-of-flight mass spectrometer. Antimicrobial susceptibility was tested by disk diffusion and broth microdilution methods. Results During the one-year period of surveillance from January 2017 to December 2017, a total of 9,130 (11.9%) isolates of target pathogens were recovered from urine specimens of 76,625 patients with suspected urinary tract infection (UTI). The rate of culture-positive was the highest in the &lt; 1 age group (AG) (22.5%), stiffly decreased in the 5–&lt;15 AG to 3.4%, and gradually increased with age up to 19.6% in the ≥ 85 AG. The mean occurrence of UTI per 10,000 patient-days for inpatients was 19.3 (range, 3.4–46.1) for E. coli and 4.0 (range, 1.5–7.3) for K. pneumoniae. Resistance rate for cefotaxime was higher than those for ceftazidime both in E. coli (31.3% vs. 10.3%) and K. pneumoniae isolates (39.0% vs. 29.8%). Resistance rate for ciprofloxacin in E. coli isolates was 40.9%, and that in K. pneumoniae isolates was 31.9%. Only 4.9% and 10.9% of E. coli and K. pneumoniae isolates exhibited resistance phenotype to cefoxitin, respectively. Ertapenem-resistance was more frequently identified in K. pneumoniae isolates (1.6%) than in E. coli isolates (0.1%). Multidrug-resistance (MDR) phenotype was identified in 61.4% of the E. coli and 44.8% of K. pneumoniae urine isolates. Conclusion Kor-GLASS generated well-curated surveillance data devoid of collection bias or isolate duplication. Cefoxitin was an alternative treatment to ciprofloxacin for urinary tract infections caused by Enterobacteriaceae. About one-half of urine isolates belonged to either MDR or XDR. Disclosures All authors: No reported disclosures.

1457. Antimicrobial Resistance of Urinary Tract Infection Pathogens in South Korea: A Surveillance Report of the One-Year Assessment in 2017