Quantitative Risk Assessment of Norovirus Transmission in Food Establishments: Evaluating the Impact of Intervention Strategies and Food Employee Behavior on the Risk Associated with Norovirus in Foods

Duret, Steven; Pouillot, Régis; Fanaselle, Wendy; Papafragkou, Efstathia; Liggans, Girvin; Williams, Laurie; Van Doren, Jane M.

doi:10.1111/risa.12758

Title: Quantitative Risk Assessment of Norovirus Transmission in Food Establishments: Evaluating the Impact of Intervention Strategies and Food Employee Behavior on the Risk Associated with Norovirus in Foods

Journal Article · 01 March 2017 · Risk Analysis

DOI: https://doi.org/10.1111/risa.12758 · OSTI ID:1457215

Duret, Steven ^[1]; Pouillot, Régis ^[1]; Fanaselle, Wendy ^[1]; Papafragkou, Efstathia ^[1]; Liggans, Girvin ^[1]; Williams, Laurie ^[1]; Van Doren, Jane M. ^[1]

U.S. Food and Drug Administration Center for Food Safety and Applied Nutrition College Park MD USA

Abstract We developed a quantitative risk assessment model using a discrete event framework to quantify and study the risk associated with norovirus transmission to consumers through food contaminated by infected food employees in a retail food setting. This study focused on the impact of ill food workers experiencing symptoms of diarrhea and vomiting and potential control measures for the transmission of norovirus to foods. The model examined the behavior of food employees regarding exclusion from work while ill and after symptom resolution and preventive measures limiting food contamination during preparation. The mean numbers of infected customers estimated for 21 scenarios were compared to the estimate for a baseline scenario representing current practices. Results show that prevention strategies examined could not prevent norovirus transmission to food when a symptomatic employee was present in the food establishment. Compliance with exclusion from work of symptomatic food employees is thus critical, with an estimated range of 75–226% of the baseline mean for full to no compliance, respectively. Results also suggest that efficient handwashing, handwashing frequency associated with gloving compliance, and elimination of contact between hands, faucets, and door handles in restrooms reduced the mean number of infected customers to 58%, 62%, and 75% of the baseline, respectively. This study provides quantitative data to evaluate the relative efficacy of policy and practices at retail to reduce norovirus illnesses and provides new insights into the interactions and interplay of prevention strategies and compliance in reducing transmission of foodborne norovirus.

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Sponsoring Organization:: USDOE

OSTI ID:: 1457215

Journal Information:: Risk Analysis, Journal Name: Risk Analysis Journal Issue: 11 Vol. 37; ISSN 0272-4332

Publisher:: Wiley-BlackwellCopyright Statement

Country of Publication:: United States

Language:: English

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