Clinical and Financial Impact of Rapid Antimicrobial Susceptibility Testing in Blood Cultures

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Abstract

The rapid identification of pathogens that cause bloodstream infections plays a vital role in the modern clinical microbiology laboratory. Despite demonstrating a significant reduction in turnaround time and a significant effect on clinical decisions, most methods do not provide complete antimicrobial susceptibility testing (AST) information. We employed rapid identification (ID) and AST using the Accelerate PhenoTest on positive blood cultures containing Gram-negative bacilli. The length of stay (LOS) significantly decreased from an average of 12.1 days prior to implementation to 6.6 days post-implementation (p = 0.02), representing potential total savings of USD 666,208.00. All-cause mortality did not differ significantly, 27 (19%) versus 18 (12%), p = 0.11. We also observed an associated decrease in the use of broad-spectrum antimicrobials, including meropenem and quinolones. The implementation of a rapid ID and AST method, along with a well-established antimicrobial stewardship program, has the potential to decrease LOS, broad-spectrum antibiotic use, and costs to the healthcare system, with no observable impact on mortality.

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Roth, F., Leedahl, N. D., Leedahl, D. D., & Guerrero, D. M. (2022). Clinical and Financial Impact of Rapid Antimicrobial Susceptibility Testing in Blood Cultures. Antibiotics, 11(2). https://doi.org/10.3390/antibiotics11020122

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