Quantitative microbial risk assessment of vibrio parahaemolyticus foodborne illness of sea squirt (Halocynthia roretzi) in South Korea

Joohyun Kang, Yewon Lee, Yukyung Choi, Sejeong Kim, Jimyeong Ha, Hyemin Oh, Yujin Kim, Yeongeun Seo, Eunyoung Park, Min Suk Rhee, Heeyoung Lee, Yohan Yoon

Research output: Contribution to journalArticlepeer-review


The annual consumption of fishery products, particularly sea squirt (Halocynthia roretzi), per person has steadily increased in South Korea. However, the quantitative risk of Vibrio parahaemolyticus following intake of sea squirt has not been analyzed. This study focuses on quantitative predictions of the probability of consuming sea squirt and getting of V. parahaemolyticus foodborne illness. The prevalence of V. parahaemolyticus in sea squirt was evaluated, and the time spent by sea squirt in trans-portation vehicles, market displays, and home refrigerators, in addition to the temperature of each of these, were recorded. The data were fitted to the @RISK program to obtain a probability distribution. Predictive models were developed to determine the fate of V. parahaemolyticus under distribution conditions. A simulation model was prepared based on experimental data, and a dose-response model for V. parahaemolyticus was prepared using data from literature to estimate infection risk. V. parahaemolyt-icus contamination was detected in 6 of 35 (17.1%) sea squirt samples. The daily consumption quantity of sea squirt was 62.14 g per person, and the consumption frequency was 0.28%. The average probability of V. parahaemolyticus foodborne illness following sea squirt consumption per person per day was 4.03 × 10–9. The objective of this study was to evaluate the risk of foodborne illness caused by Vibrio parahaemolyticus following sea squirt consumption in South Korea.

Original languageEnglish
Pages (from-to)78-88
Number of pages11
JournalFisheries and Aquatic Sciences
Issue number2
Publication statusPublished - 2021

Bibliographical note

Funding Information:
This research was supported by a grant (17162MFDS035) from Ministry of Food and Drug Safety in 2018.

Publisher Copyright:
© 2021 The Korean Society of Fisheries and Aquatic Science.


  • Halocynthia roretzi
  • Quantitative microbial risk assessment
  • Sea squirt
  • Vibrio parahaemolyticus

ASJC Scopus subject areas

  • Oceanography
  • Biochemistry
  • Aquatic Science
  • Molecular Biology


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