Background And Aim: Extended-spectrum beta-lactamase (ESBL)-producing strains exhibit antibiotic resistance and are known to infect humans worldwide. This study assessed the phenotypic and genotypic prevalence of ESBL-resistant isolates recovered from the respiratory tracts of chickens in El-Sharkia Governorate, Egypt.
Materials And Methods: We obtained 250 lung samples (one lung/bird) from 50 chicken farms (5 chickens/farm) to isolate, identify, and serotype .