3.2. Bacterial isolation, identification, and antimicrobial resistance profile
E. coli was isolated from celomic cavity, esophagus, lungs, small intestine, and cloaca. Clonal relatedness analysis (ERIC-PCR) and antimicrobial resistance profile confirmed the infection by an identicalE. coli clone. All E. coli strains were ESBL producers and displayed a resistant profile to human and veterinary broad-spectrum cephalosporins, tetracyclines, aminoglycosides, sulfonamides, trimethoprim, and quinolones, remaining susceptible to carbapenems, cephamycin and monobactams. E. coli strain from lung tissue sample was selected to WGS analysis and designed as PMPU strain.