Prevalence, Enterotoxin Genes, and Antibiotic Resistance of Bacillus cereus Isolated from Raw Vegetables in Korea

Journal of Food Protection
Kyung Min ParkMinseon Koo

Abstract

Bacillus cereus has long been recognized as an important pathogen in foodborne poisoning worldwide. Fresh vegetables are often contaminated with enterotoxigenic B. cereus and have been implicated as a vehicle for the transmission of this bacterium. This study reports on the occurrence, virulence gene profile, and antibiotic resistance of B. cereus in fresh vegetables. Of 102 examined samples, 48 (47%) of the samples were contaminated with B. cereus (>1 log CFU/g) and 7 (6.8%) of the samples showed more than 3 log CFU/g. In total, 118 B. cereus isolates were examined for the virulence genes nheA, nheB, nheC, hblA, hblC, hblD, cytK, and entFM and for resistance to antibiotics. Of these B. cereus isolates, 70% harbored nheA, nheB, nheC, and cytK. Eighteen (80%) of 21 isolates from bell peppers possessed eight enterotoxin genes. B. cereus isolates were susceptible to imipenem, vancomycin, gentamicin, erythromycin, ciprofloxacin, and chloramphenicol, whereas 22.4% of isolates from garlic chives, 48.7% from perilla leaf, and 40.5% from romaine lettuce showed antibiotic resistance to rifampin and 6% of isolates from garlic chives exhibited resistance to tetracycline. Three isolates from garlic chives were resistant to both tetracyclin...Continue Reading

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Citations

Nov 11, 2020·Toxins·Nadja JessbergerErwin Märtlbauer
Sep 11, 2019·Food Microbiology·Katia Rouzeau-SzynalskiMonika Ehling-Schulz
Feb 3, 2021·Toxins·Richard DietrichPer Einar Granum
Jun 24, 2021·Comprehensive Reviews in Food Science and Food Safety·Jelena JovanovicAndreja Rajkovic
Nov 26, 2020·Food Research International·Sun Ae KimMin Suk Rhee

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