Most resistant pathogen: E. coli. MRSA is present as well:
Of major concern is the level of resistance to oxacillin and 3rd generation cephalosporins (i.e. ceftiofur) in S. aureus. The prevalence of oxacillin resistance in Spain (3.7%) and France (8.3%) and the resistance towards cephalosporins in Spain (0.9% in 2004) and France (4.2% in 2002; 1% in 2003) indicate the presence of methicillin resistant S. aureus (MRSA) in these two countries.The authors ascribe the differences among countries to different patterns of antimicrobial use by veterinarians and stress that it is time for veterinarians to begin using measurements of local resistance patterns (in human medicine, an "antibiogram") before prescribing.
I wasn't aware that this same set of authors (Hendriksen, RS et al.) just a few weeks ago published a similar review of antimicrobial resistance in pigs in Europe. It looks at several bacterial species in pigs, but unfortunately for our purposes, no S. aureus.