E. coli are commonly found in the intestinal tract of humans and other animal species and constitute a reservoir of resistant genes for potentially pathogenic bacteria. E. coli are one of the important bacterial pathogens responsible for uterine infections in cow. Extended-spectrum beta-lactamases (ESBLs) are a novel group of enzyme, was detected in the mid-1980s among Serratiamarcescens and Klebsiellapneumoniae in Germany which produced by bacteria belongs to Enterobacteriaceae family and confer resistance to an extended-spectrum of cephalosporins besides penicillins and monobactams. From...