Purpose: This study aimed to establish the multienzyme isothermal rapid amplification with a lateral flow dipstick (MIRA-LFD) assay and evaluate its performance in detection of in spiked blood specimens.
Methods: The study was divided into two stages: a pilot study to establish the methodology and a clinical validation study to evaluate its performance. In the first step, we designed primers specific to detect , optimized the MIRA-LFD assay and analyzed its performance regarding limits of detection, reproducibility, specificity, and efficiency of detection using real-time PCR method. In the second step, we obtained 50 spiked blood isolates and detected these pathogens by MIRA-LFD assay. The MIRA-LFD time was 15 min from DNA sample amplification to complete pathogen detection.
Results: The developed MIRA-LFD assay displayed a detection limit of 6 CFU/mL for detecting , which was significantly better than that of real-time PCR method, and no cross-reactivity was observed in other non- studied. The results obtained with 50 spiked blood isolates suggested that the developed MIRA-LFD assay had high specificity and sensitivity for identifying .
Conclusions: This study demonstrates that the established MIRA-LFD assay is time-saving, more effective and sensitive, which may become a powerful tool for rapid and reliable diagnosis of bloodstream infection caused by in primary hospitals.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9626983 | PMC |
| http://dx.doi.org/10.3389/fcimb.2022.1010201 | DOI Listing |
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