1779. Defining Antimicrobial Use and Resistance in a Teaching Hospital in the Dominican Republic: Key First Steps for Development of Antimicrobial Stewardship in a Resource Limited Setting

BACKGROUND: Antimicrobial resistance is a rising threat in developing nations. Establishing antimicrobial stewardship programs (ASP) in resource-limited settings may help curb the rise of antimicrobial resistance. Understanding local resistance patterns and antimicrobial usage may help define appropriate empiric treatment regimens and gaps for ASP development. There is a paucity of data on antimicrobial usage and local susceptibilities in the Dominican Republic (DR). As part of our antimicrobial stewardship initiative, we seek to define antimicrobial resistance and antimicrobial usage at Hospital General Plaza de la Salud (HGPS), a 200 bed teaching hospital in the DR. METHODS: This is a retrospective review of local susceptibility patterns and antimicrobial use. Antimicrobial susceptibility data for Gram-negative organisms was collected from 2014 to 2017. Antimicrobial use was collected from all inpatient units from January 1, 2017 to December 31, 2017. Defined daily doses (DDD) of antimicrobials used per 1,000 patient-days (DDD/1,000) was tabulated. RESULTS: The most common Gram-negative organisms were Klebsiella pneumoniae and Escherichia coli. Extended-spectrum β-lactamase (ESBL) producing E. coli and K. pneumoniae were common (Figure 1). The average rates of ESBL E. coli and K. pneumoniae were 55% and 64%. The total average DDD/1,000 was 83. The average DDD/1,000 per drug is graphed in Figure 2. CONCLUSION: Ceftriaxone and cefazolin were the most commonly prescribed antimicrobials. Rates of ESBL-producing EC and KP are high at HGPS, with average rates above 50%. This differs greatly from reported prevalence in the United States. Thus, local treatment guidelines need to be established and may differ from Infectious Diseases Society of America guidelines. Further studies are needed to identify the clinical characteristics and risk factors of patients with ESBL in the DR. This will help local ASP programs identify and advise carbapenem use for patients at risk. Our experience at HGPS suggests that assessing local antimicrobial susceptibilities and usage is a key initial step for understanding local needs toward ASP development in resource limited settings. DISCLOSURES: All authors: No reported disclosures.