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- W2057760401 abstract "To assess the frequency of class 1 integrons among isolates of Salmonella enterica producing different types of beta-lactamases from the health region of Tortosa, and to attempt to establish the resistance genes located within their variable regions.The presence of class 1 integrons and of aadA1, aadA2, dfrA1, tem-1, oxa-1 and pse-1 resistance genes within their variable regions was investigated by PCR in 100 ampicillin-resistant isolates of S. enterica (30 S. enteritidis, 56 S. Typhimurium and 14 from other serotypes) consecutively recovered in our laboratory between 2000 and 2001. Beta-lactamases were characterized by isoelectric focusing and PCR.a) 6/57 TEM-1 producing isolates carried integrons: 1 S. ser Panama, 2 S. ser Enteritidis and 1 S. ser Typhimurium (1600 pb/aadA1-dfrA1); 1 S. ser Panama (1600 pb/aadA2-dfrA1); 1 S. ser Grumpensis (1500 pb 1 1700 pb; aadA2 and ??) b) All OXA-1 producing isolates (20 S. ser Typhimurium) bore an integron of 2000 pb/aadA1-oxa-1; c) All PSE-1 producing isolates (22 S. ser Typhimurium, most of them 104 phage type, and 1 S. enterica immobile [4,12:-:-]) harbored 2 integrons (1000 pb/aadA1 and 1,00 pb/pse-1).The presence of class 1 integrons carrying oxa-1 or pse-1 resistance genes in all the OXA-1-producing and PSE-1-producing isolates investigated could have contributed to their spread and explain the increase in frequency of multiresistant S. ser Typhimurium isolates harboring these enzymes seen in the health region of Tortosa. In addition, we report the first isolate of S. ser enterica serotype Grumpensis harboring integrons." @default.
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- W2057760401 date "2005-05-01" @default.
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- W2057760401 title "Integrones de clase 1 en aislados de Salmonella enterica productores de diferentes tipos de betalactamasas recogidos en la región sanitaria de Tortosa" @default.
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- W2057760401 doi "https://doi.org/10.1157/13074965" @default.
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