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Related Experiment Video

Updated: Jun 21, 2026

One-day Workflow Scheme for Bacterial Pathogen Detection and Antimicrobial Resistance Testing from Blood Cultures

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Published on: July 9, 2012

Rapid identification of bacterial pathogens using a PCR- and microarray-based assay.

Anna-Kaarina Järvinen¹, Sanna Laakso, Pasi Piiparinen

¹Mobidiag Ltd, 00290 Helsinki, Finland. anna-kaarina.jarvinen@mobidiag.com

BMC Microbiology

|August 12, 2009

Summary

This study introduces a rapid PCR and microarray assay for identifying 12 bacterial pathogens and detecting methicillin resistance. The method offers accurate results in three hours, guiding timely antimicrobial treatment.

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Area of Science:

Microbiology
Molecular Diagnostics
Infectious Diseases

Background:

Rapid identification of bacterial pathogens is crucial for effective treatment.
Current methods can be time-consuming, delaying optimal antimicrobial therapy.
A need exists for faster, more accurate diagnostic tools in clinical settings.

Purpose of the Study:

To develop and evaluate a novel assay for simultaneous detection and identification of 12 bacterial pathogens.
To incorporate detection of methicillin resistance (mecA gene) into the assay.
To assess the assay's performance in routine diagnostic testing using clinical samples.

Main Methods:

Development of a modified broad-range PCR targeting conserved bacterial gyrB and parE genes.
Design of a DNA amplification method yielding single-stranded DNA for microarray hybridization.
Creation of species- or genus-specific probes for pathogen identification and mecA detection on an oligonucleotide microarray.

Main Results:

The assay achieved 96% sensitivity and 98% specificity compared to culture-based methods.
High accuracy was demonstrated with only one cross-reaction among 70 untargeted bacteria.
The entire assay, including DNA extraction, PCR, and microarray, was completed in just three hours.

Conclusions:

The developed PCR-microarray assay provides rapid and reliable data for bacterial identification.
This rapid diagnostic capability can significantly aid in making timely and optimal antimicrobial treatment decisions.
The assay shows promise for integration into routine clinical microbiology diagnostics.