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The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
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Methods to Detect Viruses in Foods: Testing and Interpretation of Results <sup>1</sup>.

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Methods for Detecting Viruses in Foods: Background and General Principles 1.

D O Cliver1, R D Ellender1, M D Sobsey1

  • 1Food Research Institute, W.H.O. Collaborating Centre on Food Virology, and Department of Bacteriology, University of Wisconsin, Madison, Wisconsin 53706; Department of Microbiology, Institute of Genetics, University of Southern Mississippi, Hattiesburg, Mississippi 39401; and Department of Environmental Science and Engineering, University of North Carolina, Chapel Hill, North Carolina 27514.

Journal of Food Protection
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PubMed
Summary
This summary is machine-generated.

Foodborne viruses like Hepatitis A are a health concern. Current detection methods using cell cultures are insufficient for key viruses, necessitating improved testing for safer food supplies.

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Area of Science:

  • Food safety
  • Virology
  • Microbiology

Background:

  • Viruses, including Hepatitis A (HA) and viral gastroenteritis agents, can be transmitted through food.
  • Bacterial indicators of fecal contamination poorly correlate with viral presence in foods.
  • Certain foods like shellfish, fruits, vegetables, ground beef, and raw milk are of particular interest for viral contamination.

Purpose of the Study:

  • To describe methods for detecting viruses in various food types.
  • To highlight the limitations of current virus detection techniques.

Main Methods:

  • Current methods involve sample liquefaction, clarification, concentration, and inoculation of primate cell cultures.
  • These methods require specialized equipment and careful inclusion of controls.

Main Results:

  • Cell culture-based detection methods are inadequate for Hepatitis A virus and major foodborne gastroenteritis viruses.
  • Bacterial indicators lack reliability for assessing viral contamination in food.

Conclusions:

  • There is a critical need for improved and specific methods to detect foodborne viruses.
  • Accurate virus detection is essential for ensuring food safety and public health.