Escherichia coli strains were isolated from a single dairy farm as a sentinel organism for the
persistence of antibiotic resistance genes in the farm environment. Selective microbiological
media were used to obtain 126 E. coli isolates from slurry and faeces samples from different
farm areas. Antibiotic resistance profiling for 17 antibiotics (seven antibiotic classes) showed
57.9% of the isolates were resistant to between 3 and 15 antibiotics. The highest frequency
of resistance was to ampicillin (56.3%), and the lowest to imipenem (1.6%), which appeared …

Antimicrobial resistance (AMR) is a major public health concern, especially the extended-
spectrum β-lactamase-producing (ESBL) Escherichia coli bacteria are emerging as a global
human health hazard. This study characterized extended-spectrum β-lactamase Escherichia
coli (ESBL-E. coli) isolates from farm sources and open markets in Edo State, Nigeria. A total
of 254 samples were obtained in Edo State and included representatives from agricultural
farms (soil, manure, irrigation water) and vegetables from open markets, which included …