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Barišić I, Schoenthaler S, Ke R, Nilsson M, Noehammer C, Wiesinger-Mayr H
Diagn. Microbiol. Infect. Dis. 77 (2) 118-125 [2013-10-00; online 2013-08-12]
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 β-lactamases. The specificity of the assay was performed using 70 clinical bacterial isolates, recovering 98% of the β-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 β-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.
PubMed 23948548
DOI 10.1016/j.diagmicrobio.2013.06.013
Crossref 10.1016/j.diagmicrobio.2013.06.013
pii: S0732-8893(13)00345-3