Food Science and Biotechnology

Korean Society of Food Science and Technology (한국식품과학회)
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Application of Buoyant Density Centrifugation Method for the Rapid Detection of Feline Calicivirus in Oyster and Lettuce as Norovirus Surrogate

  • Cho, Yun-Sik (Department of Food Science and Technology and Research Center for Bioresource and Health, Chungbuk National University) ;
  • Lee, Kang-Whie (Department of Food Science and Technology and Research Center for Bioresource and Health, Chungbuk National University) ;
  • Jang, Keum-Il (Department of Food Science and Technology and Research Center for Bioresource and Health, Chungbuk National University) ;
  • Ahn, Jun-Bae (Department of Food Service Industry, Seowon University) ;
  • Kim, Kwang-Yup (Department of Food Science and Technology and Research Center for Bioresource and Health, Chungbuk National University)
  • Published : 2008.10.31
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Abstract

Norovirus has become the most common cause of human gastroenteritis in developed countries. Detection procedures of foodborne viruses from foods require several steps. The concentration step using polyethylene glycol (PEG) is time-consuming and the detection efficiency of reverse transcription-polymerase chain reaction (RT-PCR) is affected by inhibitors from food components. In this study, a rapid detection method based on buoyant density centrifugation was developed to replace the time-consuming chloroform-polyethylene glycol-Tris Tween method. Feline calicivirus that belongs to the family Caliciviridae was used as a surrogate model for norovirus. After artificial inoculation of feline calcivirus (FCV) to oyster and lettuce, 830 ${\mu}L$ of homogenized sample suspension was layered on the top of 670 ${\mu}L$ 20% percoll and centrifuged. Then RNA extraction step was proceeded with the supernatant. By varying several physical conditions, the detection limits were lowered to $2.4{\times}10^2$ PFU per 1 g in oyster and $2.4{\times}10^0$ PFU per 1 g in lettuce. The protocol obtained in this study could be used to develop new detection method for norovirus in foods.

Keywords

References

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