| characterization of quinolone resistance in escherichia coli strains of animal origin from italy. | the aim of this study was to assess the possible circulation of genetic resistance determinants and chromosomal point mutations in quinolone-resistant escherichia coli isolated from livestock from central italy. forty-nine e. coli isolates were recovered from animals during the surveillance activities of the istituto zooprofilattico abruzzo e molise (izsa&m), italy, over 2 years. the plasmid resistance determinants and point mutations in dna gyrase and topoisomerase iv were characterized by pcr ... | 2010 | 20566420 |