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Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Med+Virol 2012 ; 84 (6): 906-11 Nephropedia Template TP
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Prospective evaluation of a new automated nucleic acid extraction system using routine clinical respiratory specimens #MMPMID22499014
J Med Virol 2012[Jun]; 84 (6): 906-11 PMID22499014show ga
The aim of the study was to evaluate the MagNA Pure 96 nucleic acid extraction system using clinical respiratory specimens for identifying viruses by qualitative real-time PCR assays. Three extraction methods were tested, that is, the MagNA Pure LC, the COBAS Ampliprep, and the MagNA Pure 96 with 10-fold dilutions of an influenza A(H1N1)pdm09 sample. Two hundred thirty-nine respiratory specimens, 35 throat swabs, 164 nasopharyngeal specimens, and 40 broncho-alveolar fluids, were extracted with the MagNA Pure 96 and the COBAS Ampliprep instruments. Forty COBAS Ampliprep positive samples were also tested. Real-time PCRs were used to identify influenza A and influenza A(H1N1)pdm09, rhinovirus, enterovirus, adenovirus, varicella zoster virus, cytomegalovirus, and herpes simplex virus. Similar results were obtained on RNA extracted from dilutions of influenza A(H1N1)pdm09 with the three systems: the MagNA Pure LC, the COBAS Ampliprep, and the MagNA Pure 96. Data from clinical respiratory specimens extracted with the MagNA Pure 96 and COBAS Ampliprep instruments were in 98.5% in agreement (P < 0.0001) for influenza A and influenza A(H1N1)pdm09. Data for rhinovirus were in 97.3% agreement (P < 0.0001) and in 96.8% agreement for enterovirus. They were in 100% agreement for adenovirus. Data for cytomegalovirus and HSV1-2 were in 95.2% agreement (P < 0.0001). The MagNA Pure 96 instrument is easy-to-use, reliable, and has a high throughput for extracting total nucleic acid from respiratory specimens. These extracts are suitable for molecular diagnosis with any type of real-time PCR assay.