Method validation for norovirus detection in naturally contaminated irrigation water and fresh produce

Human enteric viruses are shed in extremely high numbers in the feces of infected individuals, becoming environmental contaminants and eventually leading to contamination of a variety of foodstuffs at the pre-harvest stage. Among these foods at risk is fresh produce and irrigation water is a major v...

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Bibliographic Details
Published in:International journal of food microbiology 2013-10, Vol.167 (1), p.74-79
Main Authors: El-Senousy, Waled Morsy, Costafreda, M. Isabel, Pintó, Rosa M., Bosch, Albert
Format: Article
Language:English
Subjects:
Allium cepa
Biological and medical sciences
Egypt
Enteric viruses
Food industries
Food microbiology
Food Microbiology - methods
Foodborne viruses
Fundamental and applied biological sciences. Psychology
Norovirus
Norovirus - genetics
Norovirus - physiology
Reverse Transcriptase Polymerase Chain Reaction
Vegetables - genetics
Vegetables - virology
Virus assay
Water Microbiology
Water Pollution - analysis
Waterborne viruses
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Summary:Human enteric viruses are shed in extremely high numbers in the feces of infected individuals, becoming environmental contaminants and eventually leading to contamination of a variety of foodstuffs at the pre-harvest stage. Among these foods at risk is fresh produce and irrigation water is a major vehicle for crop contamination. In the present study, a standardized molecular method for quantitative virus assay has been evaluated in different types of fresh produce and in irrigation water for human norovirus (NoV) detection. Two different virus concentration procedures, polyethylene-glycol precipitation (PEG) and organic flocculation (OF), were employed. The procedures were initially assayed in spiked samples and later validated on naturally contaminated samples from the Nile Delta in Egypt. Overall, PEG provided significantly (p
ISSN:0168-1605
1879-3460
DOI:10.1016/j.ijfoodmicro.2013.06.023