Journal
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
Volume 207, Issue -, Pages 83-86Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijfoodmicro.2015.04.049
Keywords
ESBLs; RTE-vegetables; Prevalence; Escherichia coli; Klebsiella pneumoniae
Categories
Funding
- Export Promotion Technology Development Program of iPET - Ministry for Food, Agriculture, Forestry, and Fisheries [313010-3]
- KU Research Professor Program of Konkuk University
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The objective of this investigation was to determine the prevalence and characteristics of extended-spectrum-beta-lactamase (ESBL)-producing Escherichia coli and Klebsiella pneumoniae in ready-to-eat (RTE) vegetables. A total of 189 RTE vegetable samples (91 sprouts and 98 mixed salads) were collected in a retail market in South Korea from October 2012 to February 2013. The prevalence of ESBL-producing E. coli and K. pneumoniae was 10.1%. Of these, 94.7% were from the sprout samples. All isolates were resistant to cefotaxime, and many of the ESBL producers were also resistant to non-beta-lactam antibiotics, including gentamicin, trimethoprim/sulfamethoxazole, and ciprofloxacin (73.7%, 632%, and 26.3% respectively). TEM-1, SHV-1, -2, -11, -12, -27, -28 and -61, and CTX-M-14, -15 and -55 beta-lactamases were detected alone or in combination. The genetic platforms of all CTX-M producing isolates were ISEcp1-bla(CTX-M)-orf477 and ISEcp1-bla(CTX-M)-IS903 in CTX-M groups 1 and 9, respectively. To our knowledge, this is the first report of the prevalence and characterization of ESBL-producing E. coli and K. pneumoniae isolated from RTE vegetables. The results of this study indicate that RTE vegetables, sprouts, in particular, may play a role in spreading antimicrobial resistant bacteria and ESBL genes to humans. (C) 2015 Elsevier B.V. All rights reserved.
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