Multiple displacement amplification as an adjunct to PCR-based detection of Staphylococcus aureus in synovial fluid View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2010-10-13

AUTHORS

Sandeep Kathju, Roger S Lasken, Latha Satish, Sandra Johnson, Paul Stoodley, J Christopher Post, Garth D Ehrlich

ABSTRACT

BACKGROUND: Detection of bacterial nucleic acids in synovial fluid following total joint arthroplasty with suspected infection can be difficult; among other technical challenges, inhibitors in the specimens require extensive sample preparation and can diminish assay sensitivity even using polymerase chain reaction (PCR)-based methods. To address this problem a simple protocol for prior use of multiple displacement amplification (MDA) as an adjunct to PCR was established and tested on both purified S. aureus DNA as well as on clinical samples known to contain S. aureus nucleic acids. FINDINGS: A single round of MDA on purified nucleic acids resulted in a > 300 thousand-fold increase in template DNA on subsequent quantitative PCR (qPCR) analysis. MDA use on clinical samples resulted in at least a 100-fold increase in sensitivity on subsequent qPCR and required no sample preparation other than a simple alkali/heat lysis step. Mixed samples of S. aureus DNA with a 103 - 104-fold excess of human genomic DNA still allowed for MDA amplification of the minor bacterial component to the threshold of detectability. CONCLUSION: MDA is a promising technique that may serve to significantly enhance the sensitivity of molecular assays in cases of suspected joint infection while simultaneously reducing the specimen handling required. More... »

PAGES

259-259

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/1756-0500-3-259

DOI

http://dx.doi.org/10.1186/1756-0500-3-259

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1047933778

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/20942932


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