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First report of CTX-M producing Escherichia coli, including the new ST2526, isolated from beef cattle and sheep in Portugal
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Orientador(es)
Resumo(s)
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.
Descrição
Palavras-chave
Extended-spectrum-b-lactamase CTX-M-type Sheep Beef Cattle Sequence Typing Resistência aos Antimicrobianos
Contexto Educativo
Citação
Food Control 2013;31(1):208-210
Editora
Elsevier/ European Federation of Food Science and Technology (EFFoST)