Abstract
The aim of this study was to develop a multiplex PCR test to detect Achromobacter xylosoxidans (AX), Burkholderia cepacia (BC), Pseudomonas aeruginosa (PSA) and Stenotrophomonas maltophilia (SM) directly from CF patient's respiratory samples using the open mode of the BD MAX™ System. A total of 402 CF respiratory samples were evaluated by culture and PCR. Specific sets of primers and probes for each target were designed in-house. Out of 402 samples tested, 196 were identified as negative and 206 as positive by culture for AX, PSA, BC and SM. Among culture positive samples, PCR detected 21/27 AX, 4/5 BC, 138/140 PSA and 29/34 SM. In addition, PCR assay identified 35 samples as positive that were initially negative by culture for those 4 targets. The CF BDM test proved to be an excellent tool to detect AX, BC, PSA and SM by real-time PCR on an automated platform.
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