Risk assessment for norovirus foodborne illness by raw oyster (Ostreidae) consumption and economic burden in Korea
- Authors
- 유윤정; Hyemin Oh; Yewon Lee; 성미선; Jeongeun Hwang; Ziwei Zhao; Sunho Park; Changsun Choi; Yohan Yoon
- Issue Date
- May-2022
- Publisher
- 한국수산과학회
- Keywords
- Seafood; Virus; Quantitative microbial risk assessment (QMRA); Food poisoning; Socio-economic cost
- Citation
- Fisheries and Aquatic Sciences, v.25, no.5, pp 287 - 297
- Pages
- 11
- Journal Title
- Fisheries and Aquatic Sciences
- Volume
- 25
- Number
- 5
- Start Page
- 287
- End Page
- 297
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/152759
- DOI
- 10.47853/FAS.2022.e26
- ISSN
- 2234-1749
2234-1757
- Abstract
- The objective of this study was to evaluate the probability of norovirus foodborne illness by raw oyster consumption. One hundred fifty-six oyster samples were collected to examine the norovirus prevalence. The oyster samples were inoculated with murine norovirus and stored at 4℃−25℃. A plaque assay determined norovirus titers. The norovirus titers were fitted with the Baranyi model to calculate shoulder period (h) and death rate (Log PFU/g/h). These kinetic parameters were fitted to a polynomial model as a function of temperature. Distribution temperature and time were surveyed, and consumption data were surveyed.
A dose-response model was also searched through literature. The simulation model was prepared with these data in @RISK to estimate the probability of norovirus foodborne. One sample of 156 samples was norovirus positive. Thus, the initial contamination level was estimated by the Beta distribution (2, 156), and the level was –5.3 Log PFU/g. The developed predictive models showed that the norovirus titers decreased in oysters under the storage conditions simulated with the Uniform distribution (0.325, 1.643) for time and the Pert distribution (10, 18, 25) for temperature. Consumption ratio of raw oyster was 0.98%, and average consumption amount was 1.82 g, calculated by the Pert distribution [Pert {1.8200, 1.8200, 335.30, Truncate (0, 236.8)}]. 1F1 hypergeometric dose-response model [1 – (1 + 2.55 × 10–3 × dose)–0.086] was appropriate to evaluate dose-response. The simulation showed that the probability of norovirus foodborne illness by raw oyster consumption was 5.90 × 10–10 per person per day. The annual socioeconomic cost of consuming raw oysters contaminated with norovirus was not very high.
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