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Multidrug resistance and integrons in Escherichia coli isolated from chicken in Greece

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Author(s): Dakić Ivana | Petrikkos G. | Dimitrijević V. | Charvalos Ekatherini

Journal: Acta Veterinaria
ISSN 0567-8315

Volume: 61;
Issue: 5-6;
Start page: 575;
Date: 2011;
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Keywords: Enterobacteriaceae | integrons | multiresistance | poultry

ABSTRACT
Enteric faecal flora of food-producing animals such as poultry is a potential reservoir for antimicrobial resistance genes which can be transferred to human pathogens via the food chain. The present study investigated 47 strains of Enterobacteriaceae recovered from a variety of chicken specimens for their resistance to 18 antimicrobial agents and the presence of integrons, and analyzed the association between integrons and antimicrobial susceptibility. Multidrug resistance was found in 82.9% of the isolates. The presence of integrons was shown in 68.1% of the strains tested: 42.5% carried a class 1 integron, 10.6% carried a class 2 integron, and 14.9% had both class 1 and 2 integrons. An unusual cassette aacA4-catB3-dfrA1 was revealed in two class 1 integron-positive isolates. The association between the presence of an integron and multidrug resistance was significant (p
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