For the monitoring and surveillance of antimicrobial resistance in aquaculture under the Japanese Veterinary Antimicrobial Resistance Monitoring System (JVARM), antimicrobial susceptibility monitoring are conducted focusing on Lactococcus garvieae and Photobacterium damselae subsp. picicida that are derived from diseased fish (Seriola) and on Vibrio parahaemolyticus that is derived from aquaculture environment. Strains that were isolated and identified from diseased fish at prefectural fisheries experiment stations were mainly used for testing. In antimicrobial susceptibility tests, MIC values were measured using an agar plate dilution method based on the CLSI guidelines. BP was defined as microbial BP: midpoint of a bimodal MIC distribution.
To further enhance surveillance of trends in antimicrobial resistance in aquaculture, the scope of surveillance was expanded to all farmed fish species in FY2017. The results of antimicrobial susceptibility monitoring of Lactococcus garvieae and Vibrio spp. are due to be published once available.