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Simulating Cross-Contamination of Cooked Pork with Salmonella enterica from Raw Pork through Home Kitchen Preparation in Vietnam

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Listed:
  • Sinh Dang-Xuan

    (Center for Public Health and Ecosystem Research, Hanoi University of Public Health, 1A Duc Thang Road, Duc Thang Ward, North Tu Liem District, Hanoi 100000, Vietnam
    Veterinary Epidemiology Unit, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai Midorimachi, Ebetsu, Hokkaido 069-8501, Japan
    International Livestock Research Institute, 298 Kim Ma Street, Hanoi 100000, Vietnam)

  • Hung Nguyen-Viet

    (Center for Public Health and Ecosystem Research, Hanoi University of Public Health, 1A Duc Thang Road, Duc Thang Ward, North Tu Liem District, Hanoi 100000, Vietnam
    International Livestock Research Institute, 298 Kim Ma Street, Hanoi 100000, Vietnam
    Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute (Swiss TPH), 57 Socinstrasse, 4002 Basel, Switzerland
    University of Basel, Socinstrasse 57, 4002 Basel, Switzerland)

  • Phuc Pham-Duc

    (Center for Public Health and Ecosystem Research, Hanoi University of Public Health, 1A Duc Thang Road, Duc Thang Ward, North Tu Liem District, Hanoi 100000, Vietnam)

  • Delia Grace

    (International Livestock Research Institute, 30709 Naivasha Street, Nairobi 00100, Kenya)

  • Fred Unger

    (International Livestock Research Institute, 298 Kim Ma Street, Hanoi 100000, Vietnam)

  • Nam Nguyen-Hai

    (Center for Public Health and Ecosystem Research, Hanoi University of Public Health, 1A Duc Thang Road, Duc Thang Ward, North Tu Liem District, Hanoi 100000, Vietnam)

  • Thanh Nguyen-Tien

    (National Institute of Veterinary Research, 86 Truong Chinh, Hanoi 100000, Vietnam)

  • Kohei Makita

    (Veterinary Epidemiology Unit, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyodai Midorimachi, Ebetsu, Hokkaido 069-8501, Japan)

Abstract

Pork is the most commonly consumed meat in Vietnam, and Salmonella enterica is a common contaminant. This study aimed to assess potential S. enterica cross-contamination between raw and cooked pork in Vietnamese households. Different scenarios for cross-contamination were constructed based on a household survey of pork handling practices (416 households). Overall, 71% of people used the same knife and cutting board for both raw and cooked pork; however, all washed their hands and utensils between handling raw and cooked pork. The different scenarios were experimentally tested. First, S. enterica was inoculated on raw pork and surfaces (hands, knives and cutting boards); next, water used for washing and pork were sampled to identify the presence and concentration of S. enterica during different scenarios of food preparation. Bootstrapping techniques were applied to simulate transfer rates of S. enterica cross-contamination. No cross-contamination to cooked pork was observed in the scenario of using the same hands with new cutting boards and knives. The probability of re-contamination in the scenarios involving re-using the cutting board after washing was significantly higher compared to the scenarios which used a new cutting board. Stochastic simulation found a high risk of cross-contamination from raw to cooked pork when the same hands, knives and cutting boards were used for handling raw and cooked pork (78%); when the same cutting board but a different knife was used, cross-contamination was still high (67%). Cross-contamination between was not seen when different cutting boards and knives were used for cutting raw and cooked pork. This study provided an insight into cross-contamination of S. enterica , given common food handling practices in Vietnamese households and can be used for risk assessment of pork consumption.

Suggested Citation

  • Sinh Dang-Xuan & Hung Nguyen-Viet & Phuc Pham-Duc & Delia Grace & Fred Unger & Nam Nguyen-Hai & Thanh Nguyen-Tien & Kohei Makita, 2018. "Simulating Cross-Contamination of Cooked Pork with Salmonella enterica from Raw Pork through Home Kitchen Preparation in Vietnam," IJERPH, MDPI, vol. 15(10), pages 1-15, October.
  • Handle: RePEc:gam:jijerp:v:15:y:2018:i:10:p:2324-:d:177509
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    References listed on IDEAS

    as
    1. Delia Grace, 2015. "Food Safety in Low and Middle Income Countries," IJERPH, MDPI, vol. 12(9), pages 1-18, August.
    2. Sinh Dang-Xuan & Hung Nguyen-Viet & Fred Unger & Phuc Pham-Duc & Delia Grace & Ngan Tran-Thi & Max Barot & Ngoc Pham-Thi & Kohei Makita, 2017. "Quantitative risk assessment of human salmonellosis in the smallholder pig value chains in urban of Vietnam," International Journal of Public Health, Springer;Swiss School of Public Health (SSPH+), vol. 62(1), pages 93-102, February.
    3. Maxine Burton & Emma Cobb & Peter Donachie & Gaby Judah & Val Curtis & Wolf-Peter Schmidt, 2011. "The Effect of Handwashing with Water or Soap on Bacterial Contamination of Hands," IJERPH, MDPI, vol. 8(1), pages 1-8, January.
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