RT article
T1 Commensal Escherichia coli Antimicrobial Resistance and Multidrug-Resistance Dynamics during Broiler Growing Period: Commercial vs. Improved Farm Conditions
A1 Montoro-Dasí, Laura
A1 Villagra, Arantxa
A1 Sevilla-Navarro, Sandra
A1 Pérez-Gracia, María T.
A1 Vega, Santiago
A1 Marín, Clara
K1 Multidrug resistance
K1 L73  Animal diseases
K1 L01  Animal husbandry
K1 L70  Veterinary science and hygiene
K1 L50  Animal physiology and biochemistry
K1 Antimicrobial resistance
K1 Broilers
K1 Farm management
K1 Escherichia coli
AB New measures applied to reduce antimicrobial resistances (AMR) at field level in broilerproduction are focused on improving animals’ welfare and resilience. However, it is necessary tohave better knowledge of AMR epidemiology. Thus, the aim of this study was to evaluate AMR andmultidrug resistance (MDR) dynamics during the rearing of broilers under commercial (33 kg/m2density and max. 20 ppm ammonia) and improved (17 kg/m2 density and max. 10 ppm ammonia)farm conditions. Day-old chicks were housed in two poultry houses (commercial vs. improved),and no antimicrobial agents were administered at any point. Animals were sampled at arrival day,mid-period and at slaughter day. High AMR rates were observed throughout rearing. No statisticaldifferences were observed between groups. Moreover, both groups presented high MDR at slaughterday. These results could be explained by vertical or horizontal resistance acquisition. In conclusion,AMR and MDR are present throughout rearing. Moreover, although a lower level of MDR wasobserved at mid-period in animals reared under less intensive conditions, no differences were foundat the end. In order to reduce the presence of AMR bacteria in poultry, further studies are needed tobetter understand AMR acquisition and prevalence in differing broiler growing conditions.
PB MDPI
SN 2076-2615
YR 2021
FD 2021
LK http://hdl.handle.net/20.500.11939/7522
UL http://hdl.handle.net/20.500.11939/7522
LA en
NO Montoro-Dasi, L., Villagra, A., Sevilla-Navarro, S., Pérez-Gracia, M. T., Vega, S., & Marin, C. (2021). Commensal Escherichia coli Antimicrobial Resistance and Multidrug-Resistance Dynamics during Broiler Growing Period: Commercial vs. Improved Farm Conditions. Animals, 11(4), 1005.
DS MINDS@UW
RD Oct 3, 2022