Format

Send to

Choose Destination
J Clin Microbiol. 2018 Mar 26;56(4). pii: e01329-17. doi: 10.1128/JCM.01329-17. Print 2018 Apr.

Multicenter Evaluation of the Accelerate PhenoTest BC Kit for Rapid Identification and Phenotypic Antimicrobial Susceptibility Testing Using Morphokinetic Cellular Analysis.

Author information

1
The Ohio State University Wexner Medical Center, Columbus, Ohio, USA Preeti.Pancholi@osumc.edu.
2
The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
3
Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
4
Cedars-Sinai Medical Center, Los Angeles, California, USA.
5
Med Fusion, Lewisville, Texas, USA.
6
University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA.
7
Laboratory Alliance of Central New York, Liverpool, New York, USA.
8
Loyola University Medical Center, Maywood, Illinois, USA.
9
Geisinger, Danville, Pennsylvania, USA.
10
UCLA, Los Angeles, California, USA.
11
The Ohio State University Wexner Medical Center, Columbus, Ohio, USA.
12
Banner Gateway Medical Center, Gilbert, Arizona, USA.
13
Mayo Clinic, Rochester, Minnesota, USA.
14
MRIGlobal, Gaithersburg, Maryland, USA.
#
Contributed equally

Abstract

We describe results from a multicenter study evaluating the Accelerate Pheno system, a first of its kind diagnostic system that rapidly identifies common bloodstream pathogens from positive blood cultures within 90 min and determines bacterial phenotypic antimicrobial susceptibility testing (AST) results within ∼7 h. A combination of fresh clinical and seeded blood cultures were tested, and results from the Accelerate Pheno system were compared to Vitek 2 results for identification (ID) and broth microdilution or disk diffusion for AST. The Accelerate Pheno system accurately identified 14 common bacterial pathogens and two Candida spp. with sensitivities ranging from 94.6 to 100%. Of fresh positive blood cultures, 89% received a monomicrobial call with a positive predictive value of 97.3%. Six common Gram-positive cocci were evaluated for ID. Five were tested against eight antibiotics, two resistance phenotypes (methicillin-resistant Staphylococcus aureus and Staphylococcus spp. [MRSA/MRS]), and inducible clindamycin resistance (MLSb). From the 4,142 AST results, the overall essential agreement (EA) and categorical agreement (CA) were 97.6% and 97.9%, respectively. Overall very major error (VME), major error (ME), and minor error (mE) rates were 1.0%, 0.7%, and 1.3%, respectively. Eight species of Gram-negative rods were evaluated against 15 antibiotics. From the 6,331 AST results, overall EA and CA were 95.4% and 94.3%, respectively. Overall VME, ME, and mE rates were 0.5%, 0.9%, and 4.8%, respectively. The Accelerate Pheno system has the unique ability to identify and provide phenotypic MIC and categorical AST results in a few hours directly from positive blood culture bottles and support accurate antimicrobial adjustment.

KEYWORDS:

FISH; MIC; antimicrobial susceptibility testing; bacteremia; blood culture; candidemia; identification; morphokinetic cellular analysis; phenotypic; rapid

PMID:
29305546
PMCID:
PMC5869823
DOI:
10.1128/JCM.01329-17
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for HighWire Icon for PubMed Central
Loading ...
Support Center