A Highly Sensitive and Selective DAMP Assay for the Detection of Bacterial Pathogens Associated With Brain Inflammation.

The early detection of meningitis pathogens-including Haemophilus influenzae, Neisseria meningitidis, Streptococcus pneumoniae, and Klebsiella pneumoniae-through point-of-care (POC) systems is essential for mitigating the risk of neurological damage, enhancing patient outcomes, and facilitating prompt clinical decision-making. Nucleic acid amplification testing (NAAT) is a promising tool for improving the diagnosis process of bacterial pathogens associated with brain inflammation. This is due to its high sensitivity, rapidity, and compatibility with portable diagnostic platforms, making it particularly suitable for POC applications. This protocol introduces an innovative diagnostic approach designed to function effectively without the need for advanced laboratory equipment. By leveraging dual-priming isothermal amplification (DAMP), the assay uses custom internal primers to enhance specificity and minimize false results. Brilliant Green is used in this assay for fluorescence detection due to its availability, high fluorescence level, and optimal sample-to-background (S/B) ratio. The assay demonstrated excellent specificity, absence of false positives, sensitivity comparable to loop-mediated isothermal amplification (LAMP), and a high S/B ratio. Key features • A POC-compatible diagnostic assay developed to enable rapid and accurate diagnosis of meningitis without the need for advanced laboratory infrastructure. • A DAMP-based approach for the identification of pathogens responsible for bacterial meningitis with high sensitivity and specificity while ensuring the absence of false-positive results.