Rapid pathogen identification using a novel microarray-based assay with purulent meningitis in cerebrospinal fluid.

Area of Science:

• Microbiology
• Molecular Diagnostics
• Infectious Diseases

Background:

• Purulent meningitis diagnosis relies on timely and accurate pathogen identification.
• Traditional cerebrospinal fluid (CSF) culture methods have limitations in speed and sensitivity.
• Developing advanced diagnostic tools is crucial for effective meningitis management.

Purpose of the Study:

• To develop and evaluate a DNA microarray technique for simultaneous detection of seven key bacterial pathogens in CSF.
• To compare the diagnostic performance of the DNA microarray with conventional CSF culture.

Main Methods:

• DNA extraction from 24 CSF samples.
• Polymerase chain reaction (PCR) amplification of specific pathogen genes.
• Fluorescence labeling and hybridization to oligonucleotide probes on a DNA microarray.
• Comparison with CSF culture results.

Main Results:

• DNA microarray achieved 87.5% positive results, significantly higher than CSF culture (58.3%).
• Identified 37.5% of cases not confirmed by culture but clinically suspected.
• Detected multiple bacterial infections in 5 cases.
• Sensitivity demonstrated as 3.5 × 10^1 gene copies/μL.

Conclusions:

• The DNA microarray technique offers superior specificity, accuracy, and sensitivity for CSF pathogen detection compared to culture.
• This method enables rapid identification of multiple pathogens and strain subtypes, aiding prompt diagnosis and treatment of purulent meningitis.