Prevalence and molecular characterization of fluoroquinolone resistance in Escherichia coli isolates from dairy cattle with endometritis in China.

Fluoroquinolones are frequently used to treat infectious disease that is caused by Escherichia coli in dairy cattle. However, fluoroquinolone resistance occurs and is due either to chromosomal mutations in the bacterial topoisomerase genes and/or to plasmid-mediated resistance genes. The purpose of this study was to determine the prevalence and molecular characteristics of fluoroquinolone resistance determinants in E.

Characterization of integrons in multiple antimicrobial resistant Escherichia coli isolates from bovine endometritis.

To assess the prevalence of antimicrobial resistance and three classes of integrons in Escherichia coli (E. coli) strains (n=57) isolated from bovine endometritis in Inner Mongolia of China, antimicrobial susceptibility and the presence of three types of integrons were characterized. Most isolates were susceptible to ceftiofur, furazolidone, ciprofloxacin and enrofloxacin, while 57 isolates were all resistant to sulfamethoxydiazine and trimethoprim.