Rapid detection of Pseudomonas aeruginosa by the fluorescence quantitative PCR assay targeting 16S rDNA / 生物工程学报
Chinese Journal of Biotechnology
; (12): 789-794, 2006.
Article
em Zh
| WPRIM
| ID: wpr-286209
Biblioteca responsável:
WPRO
ABSTRACT
The 16S rDNA specific primers were designed for rapid detection of Pseudomonas aeruginosa (PA) by the fluorescence quantitative PCR (FQ-PCR) assay, based upon multiple sequence alignment and phylogenetic tree analysis of the 16S rDNAs of over 20 bacteria. After extraction of PA genomic DNA, the target 16S rDNA fragment was amplified by PCR with specific primers, and used to construct recombinant pMDT-Pfr plasmid, the dilution gradients of which were subjected to the standard quantitation curve in FQ-PCR assay. Different concentrations of PA genomic DNA were detected by FQ-PCR in a 20microL of reaction system with SYBR Green I. At the same time, various genomic DNAs of Staphylococcus aureus, Salmonella typhi, Shigella flexneri, Proteus vulgaris, Staphylococcus epidermidis, Escherichia coli, and Mycobacterium tuberculosis were used as negative controls to confirm specificity of the FQ-PCR detection assay. Results demonstrated that the predicted amplified product of designed primers was of high homology only with PA 16S rDNA, and that sensitivity of the FQ-PCR assay was of 3.6pg/microL of bacterial DNA or (2.1 x 10(3) +/- 3.1 x 10(2)) copies/microL of 16S rDNA, accompanied with high specificity, and that the whole detection process including DNA extraction could be completed in about two hours. In contrast to traditional culture method, the FQ-PCR assay targeting 16S rDNA gene can be used to detect PA rapidly, which exhibits perfect application prospect in future.
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Índice:
WPRIM
Assunto principal:
Pseudomonas aeruginosa
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DNA Ribossômico
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Dados de Sequência Molecular
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RNA Ribossômico 16S
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Sequência de Bases
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Reação em Cadeia da Polimerase
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Fluorescência
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Genética
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Métodos
Tipo de estudo:
Diagnostic_studies
Idioma:
Zh
Revista:
Chinese Journal of Biotechnology
Ano de publicação:
2006
Tipo de documento:
Article