Antimicrobial resistance and its relationship with antimicrobial use on Austrian dairy farms.

ABSTRACT: The aim of this study was to investigate the prevalence of ESBL/AmpC-producing E. coli and the resistance pattern of commensal E. coli, as well as the link between the use of antibiotics (AMU) and the occurrence of resistance in E. coli on Austrian dairy farms. AMU data from 51 farms were collected over a one-year period in 2020. Fecal samples were collected from cows, pre-weaned and weaned calves in 2020 and 2022. Samples were then analyzed using non-selective and selective agar plates, E. coli isolates were confirmed by MALDI-TOF analysis. Broth microdilution was used for antimicrobial susceptibility testing. The AMU of each farm was quantified as the number of Defined Daily Doses (nDDD_vet) and Defined Course Doses (nDCD_vet) per cow and y

SUBMITTER: Werner T 

PROVIDER: S-EPMC10403287 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature