Quantitative Prevalence and Toxin Gene Profile of Bacillus cereus from Ready-to-Eat Vegetables in South Korea

Foodborne Pathogens and Disease
Jung-Whan ChonKun-Ho Seo

Abstract

Ready-to-eat (RTE) foods such as prepared vegetables are becoming an increasingly popular food choice. Since RTE vegetables are not commonly sterilized by heat treatment, contamination with foodborne pathogens such as Bacillus cereus (B. cereus) is a major concern. The objective of this study was to assess the quantitative prevalence and toxin gene profiles of B. cereus strains isolated from RTE vegetables. We found that 70 of the 145 (48%) tested retail vegetable salad and sprout samples were positive for B. cereus. The B. cereus isolates harbored at least one enterotoxin gene. The detection rates of nheABC, hblCDA, cytK, and entFM enterotoxin genes among all isolates were 97.1%, 100%, 81.4%, and 98.6%, respectively. No strain carried the emetic toxin genes. Only 4 strains (5.7%) from the 70 isolates were psychrotrophic and were able to grow at 7°C. All of the psychrotrophic isolates possessed at least 1 enterotoxin gene.

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Citations

Apr 14, 2018·Foodborne Pathogens and Disease·Narayan PaudyalMin Yue
Mar 12, 2017·Archives of Microbiology·Yan CaiXiaojin Liu
Nov 11, 2020·Toxins·Nadja JessbergerErwin Märtlbauer
Feb 3, 2021·Toxins·Richard DietrichPer Einar Granum
Jun 24, 2021·Comprehensive Reviews in Food Science and Food Safety·Jelena JovanovicAndreja Rajkovic

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Methods Mentioned

BETA
PCR

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