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Lett Appl Microbiol. 2000 Dec;31(6):411-5.

An improved method for the detection of Norwalk-like caliciviruses in environmental samples.

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Laboratoire de Microbiologie, IFREMER, Nantes, France.


An original magnetic beads RNA capture was developed for the detection of Norwalk-like virus by RT-PCR. The same oligonucleotide was used both for capture and reverse transcription of the viral RNA. The optimization studies showed that the most important parameter for sensitivity is the biotin-binding capacity of the beads. This method was found to be efficient for eliminating inhibitors in sewage samples compared with the classic RT-PCR. Moreover, the sensitivity was greatly enhanced, allowing the detection of 42% positive sample after gel electrophoresis, which is fourfold greater than classic RT-PCR (11%). Beads-RT-PCR sensitivity is the same as classic RT-PCR and hybridization. Thus, this method, which is easy to perform, should be of particular interest for developing quantitative RT-PCR and sequencing.

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