期刊
FOOD CONTROL
卷 31, 期 1, 页码 208-210出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2012.10.011
关键词
Extended-spectrum-beta-lactamase; CTX-M-type; Sheep; Beef cattle; Sequence typing
资金
- Fundacao para a Ciencia e a Tecnologia (FCT), Portugal [SFRH/BD/47706/2008]
- Programa Ciencia
- POPH QREN Type 4.2-Employment Promotion Scientific
- European Social Fund
- National Funds of Ministry of Science and Technology for High Education (MCTES)
- Fundação para a Ciência e a Tecnologia [SFRH/BD/47706/2008] Funding Source: FCT
The prevalence of extended-spectrum beta-lactamase-containing Escherichia coli isolates was studied in beef cattle and sheep at slaughter in Portugal. CTX-M-producing E. coli isolates were detected in 7% of the 127 fecal samples. The beta-lactamase genes detected were as following: CTX-M-32 (n = 4), TEM-1 + CTX-M-1 (n = 3) and CTX-M-1 (n = 2). All CTX-M-containing isolates exhibit a multiresistant phenotype. MLST analysis revealed four different STs under 2 ST complexes (STC10 and STC155) and we detected a novel allelic profile representing a new ST, registered in the database as ST2526. Five of the CTX-M-containing isolates were classified in the B1 phylogroup and 4 isolates in the A phylogroup. Eight isolates harbored at least one of the virulence factors studied. Detection of CTX-M-producers E. coli in beef cattle and sheep raises important questions as they can represent a potential risk factor to public health. (C) 2012 Elsevier Ltd. All rights reserved.
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