Japanese Veterinary Antimicrobial Resistance Monitoring System (JVARM)
Monitoring of antimicrobial resistance on 13 agents was carried out between 2011 and 2015. Among Enterococcus spp. in 2015, resistant strains accounted for between 2.3% (5 out of 220 cattle-derived strains) and 61.0% (89 out of 146 broiler-derived strains) of Enterococcus faecalis, and for between 7.5% (11 out of 146 broiler-derived strains) and 11.4% (25 out of 220 cattle-derived strains and 13 out of 114 layer-derived strains) of Enterococcus faecium. Resistance to enrofloxacin (ERFX), which is a critically important antimicrobial for human medicine, ranged between 6.8% and 20.2% among Enterococcus spp., but whereas the figures for Enterococcus faecalis ranged between 0.0% and 6.3%, those for Enterococcus faecium varied from 28.0% to as high as 92.3%.