76. Uncomplicated Urinary Tract Infections in the Multi-resistance Era: Is It Time of Microbiologic Diagnosis? An Observational Study in Buenos Aires City

Abstract Background Uncomplicated urinary tract infection (uUTI) is one of the main causes of antibiotics prescription in outpatient setting. Current recommendations, based on studies from pre-antimicrobial resistance era, suggest that diagnosis of uUTI can be made based on clinical symptoms and that urine analysis leads only to a minimal increase in diagnostic accuracy. We analyzed urine cultures (UC) from patients with clinical diagnosis. Methods Prospective and observational study carried out in an Emergency Department during August 2016 to August 2017. Women older than 15 years with 2 or more classic symptoms of uUTI and the absence of vaginal discharge and irritation were included. Those with complicated and recurrent urinary tract infection (UTI) were excluded. Urine cytology and UC were performed in all episodes. A bivariate and multivariate analysis was performed considering the probability of having a positive urine culture according to the different symptomatology variables. Results We enrolled 208 patients, with a median age of 25 (14-68 years). Previous UTI 6 (2.9%), previous antibiotic (last 3 months) 20 (9.6%). Inflammatory cytology 173 (83.2%), positive UC 109 (52.4%), cystitis 155 (74.5%). Symptoms: dysuria 154 (74%), frequency 111 (53.4%), tenesmus 97 (46.6%), fever 78 (37.5%), hematuria 43 (20, 7%), hypogastric pain 128 (61.5%), back pain 84 (40.4%). Combinations of 3 or more classic symptoms occurred in 52 (25%) episodes. The most frequent association was dysuria, frequency and tenesmus. No statistically significant association was found either in the bivariate or multivariate analysis in relation to presenting positive UC (Tables 1 and 2). Conclusion The results show that almost 50% of the patients with a clinical diagnosis of UTI had a negative urine culture. We consider it necessary to rethink the prescription of antibiotics without microbiological confirmation in the first episode of uUTI as a strategy to reduce inappropriate use of antibiotics. Disclosures All Authors: No reported disclosures

Background. Uncomplicated urinary tract infection (uUTI) is one of the main causes of antibiotics prescription in outpatient setting. Current recommendations, based on studies from pre-antimicrobial resistance era, suggest that diagnosis of uUTI can be made based on clinical symptoms and that urine analysis leads only to a minimal increase in diagnostic accuracy. We analyzed urine cultures (UC) from patients with clinical diagnosis.
Methods. Prospective and observational study carried out in an Emergency Department during August 2016 to August 2017. Women older than 15 years with 2 or more classic symptoms of uUTI and the absence of vaginal discharge and irritation were included. Those with complicated and recurrent urinary tract infection (UTI) were excluded. Urine cytology and UC were performed in all episodes. A bivariate and multivariate analysis was performed considering the probability of having a positive urine culture according to the different symptomatology variables.

Conclusion.
The results show that almost 50% of the patients with a clinical diagnosis of UTI had a negative urine culture. We consider it necessary to rethink the prescription of antibiotics without microbiological confirmation in the first episode of uUTI as a strategy to reduce inappropriate use of antibiotics.
Disclosures. All Authors: No reported disclosures

Opportunity for Improved Use of a Commercially Available Meningitis/ Encephalitis Panel in Pediatric Patients
Marilyn E. Valentine, MD 1 ; Jared Olson, PharmD 1 ; Emily A. Thorell, MD, MSCI 1 ; Anne Bonkowsky, MD/PhD 1 ; Jason Lake, MD, MPH 1 ; 1 University of Utah, Salt Lake City, Utah

Session: P-05. Antimicrobial Stewardship: Diagnostics/Diagnostic Stewardship
Background. The BioFire® FilmArray Meningitis/Encephalitis (ME) panel delivers timely CSF analysis when meningitis or encephalitis is suspected and has the potential for earlier optimization of patient care. It is unclear if the M/E panel provides incremental benefit over standard microbiologic methods such as culture and cell counts, especially in the absence of significant pleocytosis. We evaluated the clinical utility of the ME panel with respect to CSF white blood cell count per high power field (WBC/hpf) and patient age.
Methods. We identified paired CSF ME panels and CSF cultures collected throughout a large healthcare system from 2016-May 2021 in children < 18 years of age. CSF results from the same calendar day were included in the dataset. We reviewed standalone HSV and Enterovirus (EV) CSF studies to determine frequency of duplicative testing. Results were stratified by CSF WBC/hpf and patient age (< 14 days, 14-60 days, > 60 days and < 5 years, and > 5 years).