Simulation of cross contamination and decontamination of Campylobacter jejuni during handling of contaminated raw vegetables in a domestic kitchen

Chai, Lay-Ching and Lee, Hai-Yen and Mohd Ghazali, Farinazleen and Abu Bakar, Fatimah and Malakar, Pradeep Kumar and Nishibuchi, Mitsuaki and Nakaguchi, Yoshitsugu and Radu, Son (2008) Simulation of cross contamination and decontamination of Campylobacter jejuni during handling of contaminated raw vegetables in a domestic kitchen. Journal of Food Protection, 71 (12). pp. 2448-2452. ISSN 0362-028X

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Official URL: http://www.ncbi.nlm.nih.gov/pubmed/19244897

Abstract

Campylobacter jejuni was found to occur at high prevalence in the raw salad vegetables examined. Previous reports describe cross-contamination involving meat; here we investigated the occurrence of cross-contamination and decontamination events in the domestic kitchen via C. jejuni-contaminated vegetables during salad preparation. This is the first report concerning quantitative cross-contamination and decontamination involving naturally contaminated produce. The study was designed to simulate the real preparation of salad in a household kitchen, starting with washing the vegetables in tap water, then cutting the vegetables on a cutting board, followed by slicing cucumber and blanching (heating in hot water) the vegetables in 85°C water. Vegetables naturally contaminated with C. jejuni were used throughout the simulation to attain realistic quantitative data. The mean of the percent transfer rates for C. jejuni from vegetable to wash water was 30.1 to 38.2%; from wash water to cucumber, it was 26.3 to 47.2%; from vegetables to cutting board, it was 1.6 to 10.3%; and from cutting board to cucumber, it was 22.6 to 73.3%. The data suggest the wash water and plastic cutting board as potential risk factors in C. jejuni transmission to consumers. Washing of the vegetables with tap water caused a 0.4-log reduction of C. jejuni attached to the vegetables (most probable number/gram), while rapid blanching reduced the number of C. jejuni organisms to an undetectable level.

Item Type:Article
Subject:Campylobacter jejuni
Subject:Campylobacter infections
Subject:Food contamination
Faculty or Institute:Faculty of Food Science and Technology
Publisher:International Association for Food Protection
ID Code:16722
Deposited By: Khairil Ridzuan Khahirullah
Deposited On:24 May 2012 03:39
Last Modified:02 Nov 2012 06:50

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