Abstract
A simple, rapid, and user-friendly procedure has been developed to identify Staphylococcus aureus and determine its methicillin resistance directly from gram-positive cocci in cluster-containing blood culture medium. The specimens were diluted and heated prior to amplification of the nuc and mecA genes with isothermal helicase-dependent amplification. Amplicons were detected using a disposable detection device. The analytical sensitivity of the assays was 50 CFU per reaction, and the clinical sensitivity and specificity were both 100% for S. aureus detection and 100% and 98% for methicillin resistance determination, respectively.
Publication types
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Evaluation Study
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Research Support, N.I.H., Extramural
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Bacterial Proteins / genetics
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Blood / microbiology
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Culture Media
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DNA Helicases / metabolism
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Disposable Equipment
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Endonucleases / genetics
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Humans
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Methicillin Resistance*
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Micrococcal Nuclease / genetics
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Nucleic Acid Amplification Techniques / instrumentation
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Nucleic Acid Amplification Techniques / methods*
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Penicillin-Binding Proteins
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Reagent Kits, Diagnostic*
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Sensitivity and Specificity
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Staphylococcus aureus / classification*
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Staphylococcus aureus / drug effects
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Staphylococcus aureus / genetics
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Staphylococcus aureus / isolation & purification
Substances
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Bacterial Proteins
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Culture Media
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Penicillin-Binding Proteins
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Reagent Kits, Diagnostic
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mecA protein, Staphylococcus aureus
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nuc protein, staphylococcus
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Endonucleases
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Micrococcal Nuclease
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DNA Helicases