Antimicrobial resistance in commensal Escherichia coli and Enterococcus spp. is influenced by production system, antimicrobial use, and biosecurity measures on Spanish pig farms

1. Mencía-Ares, O.
2. Argüello, H.
3. Puente, H.
4. Gómez-García, M.
5. Manzanilla, E.G.
6. Álvarez-Ordóñez, A.
7. Carvajal, A.
8. Rubio, P.