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Related Experiment Videos

The MicroScan WalkAway diagnostic microbiology system--an evaluation

A McGregor1, F Schio, S Beaton

  • 1Department of Clinical Microbiology, Westmead Hospital, Sydney.

Pathology
|April 1, 1995
PubMed
Summary

The MicroScan WalkAway system accurately identifies most bacteria and determines antibiotic susceptibility, offering rapid results for clinical microbiology. However, some Gram-positive organisms, like certain streptococci, may require further testing for definitive identification.

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Area of Science:

  • Clinical Microbiology
  • Medical Technology
  • Bacterial Diagnostics

Background:

  • The MicroScan WalkAway automated system for bacterial identification and susceptibility testing is newly available in Australasia.
  • Evaluating new diagnostic technologies is crucial for improving clinical laboratory efficiency and patient care.

Purpose of the Study:

  • To assess the performance of the MicroScan WalkAway system using Rapid fluorescent panels.
  • To compare MicroScan results with conventional methods for bacterial identification and antibiotic susceptibility testing.

Main Methods:

  • 100 Gram-negative and 100 Gram-positive organisms were tested.
  • MicroScan identifications and susceptibilities were compared to conventional biochemical identification and agar dilution methods.

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  • National Committee on Clinical Laboratory Standards guidelines were followed.

    • Main Results:

    • 93% agreement for Gram-negative identification; results available within 2 hours.
    • 2% very major/major and 8% minor discrepancies in Gram-negative susceptibility tests.
    • 87-90% agreement for Gram-positive identification; susceptibility results showed <1% major discrepancies.

    Conclusions:

    • The MicroScan WalkAway system provides rapid and generally accurate results for bacterial identification and susceptibility testing.
    • While effective for most organisms, further identification may be needed for certain Gram-positive bacteria, such as streptococci.
    • The system demonstrates good performance for clinical microbiology laboratories in Australasia.