Multiplex detection of antibiotic resistance genes using padlock probes
2013 (English)In: Diagnostic microbiology and infectious disease, ISSN 0732-8893, E-ISSN 1879-0070, Vol. 77, no 2, 118-125 p.Article in journal (Refereed) Published
The elucidation of resistance mechanisms is of central importance to providing and maintaining efficient medical treatment. However, molecular detection methods covering the complete set of resistance genes with a single test are still missing. Here, we present a novel 100-plex assay based on padlock probes in combination with a microarray that allows the simultaneous large-scale identification of highly diverse beta-lactamases. The specificity of the assay was performed using 70 clinical bacterial isolates, recovering 98% of the beta-lactamase nucleotide sequences present. Additionally, the sensitivity was evaluated with PCR products and genomic bacterial DNA, revealing a detection limit of 10(4) DNA copies per reaction when using PCR products as the template. Pre-amplification of genomic DNA in a 25-multiplex PCR further facilitated the detection of beta-lactamase genes in dilutions of 10(7) cells/mL. In summary, we present an efficient, highly specific, and highly sensitive multiplex detection method for any gene.
Place, publisher, year, edition, pages
2013. Vol. 77, no 2, 118-125 p.
Multiplex detection, beta-lactamases, Microarray, Padlock probes
Microbiology Infectious Medicine
IdentifiersURN: urn:nbn:se:su:diva-96106DOI: 10.1016/j.diagmicrobio.2013.06.013ISI: 000325449100007OAI: oai:DiVA.org:su-96106DiVA: diva2:664056