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http://dx.doi.org/10.13103/JFHS.2020.35.6.552

Quantitative Risk Assessment of Listeria monocytogenes Foodborne Illness Caused by Consumption of Cheese  

Ha, Jimyeong (Risk Analysis Research Center, Sookmyung Women's University)
Lee, Jeeyeon (Department of Food & Nutrition, Dong-eui University)
Publication Information
Journal of Food Hygiene and Safety / v.35, no.6, 2020 , pp. 552-560 More about this Journal
Abstract
Listeria monocytogenes is a highly pathogenic gram-positive bacterium that is easily isolated from cheese, meat, processed meat products, and smoked salmon. A zero-tolerance (n=5, c=0, m=0/25 g) criteria has been applied for L. monocytogenes in cheese meaning that L. monocytogenes must not be detected in any 25 g of samples. However, there was a lack of scientific information behind this criteria. Therefore, in this study, we conducted a risk assessment based on literature reviews to provide scientific information supporting the baseline and to raise public awareness of L. monocytogenes foodborne illness. Quantitative risk assessment of L. monocytogenes for cheese was conducted using the following steps: exposure assessment, hazard characterization, and risk characterization. As a result, the initial contamination level of L. monocytogenes was -4.0 Log CFU/g in cheese. The consumption frequency of cheese was 11.8%, and the appropriate probability distribution for amount of cheese consumed was a Lognormal distribution with an average of 32.5 g. In conclusion, the mean of probabilities of foodborne illness caused by the consumption of cheese was 5.09×10-7 in the healthy population and 4.32×10-6 in the susceptible population. Consumption frequency has the biggest effect on the probability of foodborne illness, but storage and transportation times have also been found to affect the probability of foodborne illness; thus, management of the distribution environment should be considered important. Through this risk assessment, scientific data to support the criteria for L. monocytogenes in cheese could be obtained. In addition, we recommend that further risk assessment studies of L. monocytogenes in various foods be conducted in the future.
Keywords
Quantitative risk assessment; Listeria monocytogenes; Cheese; @RISK;
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Times Cited By KSCI : 7  (Citation Analysis)
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