Epidemiology of antimicrobial resistance (AMR) on California dairies: descriptive and cluster analyses of AMR phenotype of fecal commensal bacteria isolated from adult cows.
Essam M AbdelfattahPius S EkongEmmanuel OkelloTapakorn ChamchoyBetsy M KarleRandi A BlackDavid SheedyWagdy R ElAshmawyDeniece R WilliamsDaniela CalifanoLuis Fernando Durán TovarJonathan OngomTerry W LehenbauerBarbara A ByrneSharif S AlyPublished in: PeerJ (2021)
Our findings showed high rates of AMR to several drugs that are not labeled for use in lactating dairy cattle 20 months of age or older. Conversely, very low resistance was observed for drugs labeled for use in adult dairy cows, such as cephalosporins and penicillin. Overall, our findings identified important differences in AMR by antimicrobial class, region and season.