Key Findings

The study identified multiple extended-spectrum beta-lactamase (ESBL) genes, including bla CTX-M-105, bla CTX-M-27, bla CTX-M-55, bla CTX-M-24e, and others, in Escherichia coli isolates from ducks and environmental samples. These genes confer resistance to various β-lactam antibiotics and other antimicrobials.