The Role of fosA in Challenges with Fosfomycin Susceptibility Testing of Multispecies Klebsiella pneumoniae Carbapenemase-Producing Clinical Isolates

Author:

Elliott Zachary S.12,Barry Katie E.2,Cox Heather L.12,Stoesser Nicole34ORCID,Carroll Joanne5,Vegesana Kasi6,Kotay Shireen2,Sheppard Anna E.34,Wailan Alex2,Crook Derrick W.347,Parikh Hardik8,Mathers Amy J.25ORCID

Affiliation:

1. Department of Pharmacy Services, University of Virginia Health System, Charlottesville, Virginia, USA

2. Division of Infectious Diseases and International Health, Department of Medicine, University of Virginia Health System, Charlottesville, Virginia, USA

3. Modernizing Medical Microbiology Consortium, Nuffield Department of Clinical Medicine, John Radcliffe Hospital, Oxford University, Oxford, United Kingdom

4. NIHR Health Protection Research Unit in Healthcare Associated Infection and Antimicrobial Resistance, University of Oxford in partnership with Public Health England, Oxford, United Kingdom

5. Clinical Microbiology, Department of Pathology, University of Virginia Health System, Charlottesville, Virginia, USA

6. Health Information & Technology, University of Virginia Health System, Charlottesville, Virginia, USA

7. NIHR Oxford Biomedical Research Centre, Oxford, United Kingdom

8. School of Medicine Research Computing, University of Virginia, Charlottesville, Virginia, USA

Abstract

With multidrug-resistant (MDR) Enterobacterales on the rise, a nontoxic antimicrobial agent with a unique mechanism of action such as fosfomycin seems attractive. However, establishing accurate fosfomycin susceptibility testing for non- Escherichia coli isolates in a clinical microbiology laboratory remains problematic. We evaluated fosfomycin susceptibility by multiple methods with 96 KPC-producing clinical isolates of multiple strains and species collected at a single center between 2008 and 2016.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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