Rapid diagnostic testing in the management of urinary tract infection: Potentials and limitations

Urine culture and sensitivity (C&S) remains the gold standard diagnostic for urinary tract infections (UTI). To reduce the use of inaccurate or broad-spectrum empiric antimicrobials, rapid identification and quantification (IDQ) and antimicrobial susceptibility testing (AST) with results within 30 and 150 min, respectively, are under development. To assess the impact of rapid diagnostics, five UTI vignettes were constructed, and ninety-one United States physicians were surveyed regarding their diagnostic, management, and antimicrobial choices before and after IDQ and AST results. Rapid diagnostics increased the postponement of antimicrobial therapy pending AST results from 16% to 38% and 5% to 54% in Vignettes 1 and 2 and reduced the use of ineffective antibiotics from 41% to 0% and 69% to 0% in Vignettes 2 and 4. Rapid diagnostics increased the use of narrow spectrum agents in the five vignettes, indicating its potential to revitalize physician responsibility in antimicrobial stewardship.