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Determination of Genetic Relatedness of Linezolid-resistant Vancomycin-resistant Enterococci (VRE) Surveillance Cultures

This study has been completed.
Information provided by (Responsible Party):
University of Pittsburgh Identifier:
First received: May 17, 2007
Last updated: December 5, 2014
Last verified: December 2014
The study will help in identifying the best empiric antibiotic option for Linezolid resistant Vancomycin-resistant Enterococci (VRE) infections. This research is important because it allows the determination of resistance rates to antibiotics that may not be frequently tested to by the clinical microbiology laboratory at UPMC-Presbyterian. It also will provide antibiotic minimum inhibitory concentrations (MICs) for these pathogens which may help in identifying the best empiric antibiotic option for Linezolid-resistant VRE infections.


Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Retrospective
Official Title: Determination of Genetic Relatedness of Linezolid-resistant Vancomycin-resistant Enterococci (VRE) Surveillance Cultures

Resource links provided by NLM:

Further study details as provided by University of Pittsburgh:

Primary Outcome Measures:
  • dead or alive [ Time Frame: end of study ]
    health status

Enrollment: 20
Study Start Date: April 2007
Study Completion Date: December 2014
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Detailed Description:
After 20 linezolid-resistant VRE isolates are identified, genetic relatedness will be determined using a method known as Pulse-field gel electrophoresis (PFGE). No patient related data will accompany these isolates, nor will any related identifiers. These isolates will be tested using standardized susceptibility methods. We will then grow each isolate and test via approved laboratory standards (E-test, AB Biodisk, Stockholm, Sweden) to the drug linezolid. Those determined to be resistant using this approved methodology will be saved until 20 isolates are identified. For resistant isolates found, analytical and molecular techniques will be performed to determine the mechanisms of resistance and whether resistant isolates are coming from a single source/being transmitted from person to person.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Probability Sample
Study Population
isolates for rectal surveillance

Inclusion Criteria:

  • Dr. Harrison's laboratory collected the rectal surveillance isolates for infection control purposes. The isolates will be from January 1, 2006 to December 31, 2006.
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Please refer to this study by its identifier: NCT00475891

United States, Pennsylvania
University of Pittsburgh Medical Center
Pittsburgh, Pennsylvania, United States, 15213
Sponsors and Collaborators
University of Pittsburgh
Principal Investigator: Brian Potoski, Pharm D University of Pittsburgh
  More Information

Responsible Party: University of Pittsburgh Identifier: NCT00475891     History of Changes
Other Study ID Numbers: PRO07050007
Study First Received: May 17, 2007
Last Updated: December 5, 2014

Keywords provided by University of Pittsburgh:

Additional relevant MeSH terms:
Anti-Bacterial Agents
Anti-Infective Agents
Protein Synthesis Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action processed this record on May 25, 2017