Journal of Microbiology

The Microbiological Society of Korea (한국미생물학회)
권호 표지

Development of a Virus Concentration Method and its Application for the Detection of Noroviruses in Drinking Water in China

  • Liu, Junyi (Wuhan Institute of Virology, Chinese Academy of Science) ;
  • Wu, Qingping (Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology) ;
  • Kou, Xiaoxia (Wuhan Institute of Virology, Chinese Academy of Science)
  • Published : 2007.02.22
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Abstract

A new procedure for the concentration of nonoviruses from water samples has been developed. This procedure (calcium flocculation-citrate dissolution method) uses the following steps: virus flocculation formed by treatment with 1 M $CaCl_2$ and 1 M $Na_2HPO_4$, virus release by sodium citrate dissolution (0.3 M Na citrate, pH 3.5), and virus re-concentration by ultrafiltration. When reverse transcription (RT)-PCR was performed after the procedure, the overall detection sensitivity for seeded noroviruses in a one liter drinking water sample was as low as 1 RT-PCR unit, which is equal to a $10^{-6}$ dilution of the virus sample. This approach showed at least a 5-fold-higher sensitivity than the current method with its three steps of adsorption-elution-concentration. The newly developed procedure was used to test different brands of bottled drinking water from China for putative contamination with noroviruses. A total of 144 samples were analyzed; all of the samples were negative for norovirus specific nucleic acids.

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References

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