Recurrent Pseudobacteremias Traced to a Radiometric Blood Culture Device

Author:

Bradley Suzanne F.,Wilson Kenneth H.,Rosloniec Michael A.,Kauffman Carol A.

Abstract

AbstractFive clusters of pseudobacteremias over a seven-month period were traced to a BACTEC® radiometric device. Four episodes were due to enterococcus and one involved Staphylococcus aureus. Each cluster began with multiple positive blood cultures from a patient with clinical evidence of bacteremia. On subsequent days each bottle in sequence yielded growth of the identical organism, as shown by phage typing and antibiograms. Cultures from patients believed to be infected with the organisms tested positive earlier (mean = 1.4 days) than those patients believed to be pseudobacteremic (mean = 4.8 days). Investigation pointed toward the BACTEC device as the most likely source. Resin beads were found in the needle on several occasions and were shown to be transferred from bottle to bottle. We postulated that contaminated resin beads or liquid from a positive bottle remained in the needle above the portion that was heat-sterilized, contaminating the next bottle when it was sampled.

Publisher

Cambridge University Press (CUP)

Subject

General Medicine

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1. Pseudo-Outbreak of Multiresistant Pseudomonas aeruginosa in a Hematology Unit;Infection Control and Hospital Epidemiology;1997-02

2. PSEUDOINFECTIONS;Infectious Diseases in Clinical Practice;1995-03

3. A Pseudoepidemic Due to Laboratory Contamination Deciphered by Molecular Analysis;Infection Control and Hospital Epidemiology;1995-02

4. Investigation of a Pseudo-Outbreak of Orthopedic Infections Caused by Pseudomonas aeruginosa;Infection Control and Hospital Epidemiology;1994-10

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