Bacteria Broadly-Resistant to Last Resort Antibiotics Detected in Commercial Chicken Farms.

Resistance to last resort antibiotics in bacteria is an emerging threat to human and animal health. It is important to identify the source of these antimicrobial resistant (AMR) bacteria that are resistant to clinically important antibiotics and evaluate their potential transfer among bacteria. The objectives of this study were to (i) detect bacteria resistant to colistin, carbapenems, and β-lactams in commercial poultry farms, (ii) characterize phylogenetic and virulence markers of isolates to potentiate virulence risk, and (iii) assess potential transfer of AMR from these isolates via conjugation.