The data presents the antimicrobial susceptibility testing results in three separate files: 1) third generation cephalosporin resistant E. coli isolates obtained on cefotaxime supplemented media; 2) extended spectrum beta-lactamase (ESBL) producing E. coli, and 3) ESBL-producing Klebsiella, Enterobacter and Citrobacter species obtained on chromogenic media. The data was generated as part of a research project that evaluated the impact of tylosin supplementation of feedlot cattle on the dynamics of antimicrobial resistant fecal bacteria. The study was a longitudinal design with periodic sampling of fecal samples from individual animals over the entire feeding period. Two publications from the project, one describing the study design in detail, and the other specifically reporting on these data, are linked to the database. Resources in this dataset:

Resource Title: Third generation cephalosporin resistant E. coli File Name: TYAMR-TGC Combined Data.xlsx Resource Description: Third generation cephalosporin resistant E. coli from TyAMR project.

Resource Title: ESBL-producing E. coli File Name: TyAMR-ESBLs isolates-combined AST data.xlsx Resource Description:

Resource Title: ESBL-producing Klebsiella, Enterobacter and Citrobacter spp. File Name: TyAMR KEC-with AST interpretation.xlsx Resource Description: ESBL-producing Klebsiella, Enterobacter and Citrobacter obtained as part of TyAMR project.