Fully automated identification of Neisseria meningitidis using the BD MAX system in a clinical laboratory setting: A...

Area of Science:

• Microbiology
• Clinical Diagnostics
• Molecular Biology

Background:

• Accurate identification of Neisseria meningitidis is critical for managing invasive infections and meningitis.
• Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry can misidentify Neisseria species, requiring biochemical confirmation.
• Current confirmatory tests necessitate subculturing, increasing biosafety risks due to high bacterial concentrations.

Purpose of the Study:

• To develop a real-time polymerase chain reaction (PCR) detection system for Neisseria meningitidis.
• To implement and evaluate this system on the BD MAX automated genetic testing platform.
• To assess the system's accuracy, sensitivity, and biosafety benefits compared to existing methods.

Main Methods:

• Development of a real-time PCR assay targeting Neisseria meningitidis.
• Utilized the BD MAX automated genetic testing platform for closed-system detection.
• Evaluated assay performance using 25 clinical isolates of Neisseria species, including N. meningitidis.

Main Results:

• The real-time PCR system demonstrated full agreement with sequencing-based identification results.
• Achieved a minimum detection sensitivity of 10 CFU/mL for Neisseria meningitidis.
• The BD MAX platform provided rapid and precise identification within a closed system.

Conclusions:

• The developed real-time PCR assay on the BD MAX platform offers accurate and rapid identification of Neisseria meningitidis.
• This automated system enhances laboratory biosafety by minimizing handling and reducing exposure risks.
• The findings support the adoption of this method for improved clinical management and infection control of N. meningitidis.