Rapid Antimicrobial Susceptibility Testing Using Forward Laser Light Scatter Technology

Author:

Hayden Randall T.1,Clinton Lani K.2,Hewitt Carolyn1,Koyamatsu Terri3,Sun Yilun4,Jamison Ginger1,Perkins Rosalie1,Tang Li4,Pounds Stanley4,Bankowski Matthew J.35

Affiliation:

1. St. Jude Children's Research Hospital, Department of Pathology, Memphis, Tennessee, USA

2. Pathology Residency Program, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii, USA

3. Diagnostic Laboratory Services, Inc. (The Queen's Medical Center), Aiea, Hawaii, USA

4. St. Jude Children's Research Hospital, Department of Biostatisics, Memphis, Tennessee, USA

5. Department of Pathology and Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii, USA

Abstract

ABSTRACT The delayed reporting of antimicrobial susceptibility testing remains a limiting factor in clinical decision-making in the treatment of bacterial infection. This study evaluates the use of forward laser light scatter (FLLS) to measure bacterial growth for the early determination of antimicrobial susceptibility. Three isolates each (two clinical isolates and one reference strain) of Staphylococcus aureus , Escherichia coli , and Pseudomonas aeruginosa were tested in triplicate using two commercial antimicrobial testing systems, the Vitek2 and the MicroScan MIC panel, to challenge the BacterioScan FLLS. The BacterioScan FLLS showed a high degree of categorical concordance with the commercial methods. Pairwise comparison with each commercial system serving as a reference standard showed 88.9% agreement with MicroScan (two minor errors) and 72.2% agreement with Vitek (five minor errors). FLLS using the BacterioScan system shows promise as a novel method for the rapid and accurate determination of antimicrobial susceptibility.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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