Ji Hye Yangb, Jong Soo Moka,*, Yeoun Joong Jungb, Ka Jeong Leeb, Ji Young Kwona, Kunbawui Parka, Seong Yong Moonb, Soon Jae Kwonb, A Ra Ryub, Tea Seek Leea
a Food Safety and Processing Research Division, National Institute of Fisheries Science, Busan 46083, Republic of Korea
b Southeast Sea Fisheries Research Institute, National Institute of Fisheries Science, Tongyeong 53085, Republic of Korea
* Corresponding author : Jong Soo Mok
Vibrio parahaemolyticus and V. vulnificus are the most common pathogens causing seafood-borne illnesses in Korea. This study determines the abundance and antimicrobial resistance of pathogenic Vibrio species in seawater and zooplankton samples from the Geoje Island coast in Korea, which is an important area for coastal fisheries, the fishing industry, and tourism. The two Vibrio species were detected more in mesozooplankton samples than in seawater samples. V. parahaemolyticus isolates showed greater resistance than those of V. vulnificus for antimicrobials. Of V. parahaemolyticus isolates, 93.3% exhibited resistance to three or more antimicrobial agents. Conversely, more than 80% of V. vulnificus isolates showed susceptibility to all antimicrobials examined, with the exception of rifampicin. Our findings show that strong antimicrobial resistance of V. parahaemolyticus in the surveyed area was exposed to conventionally used antibiotics, therefore necessitating proper surveillance programs for the monitoring of antimicrobial resistance patterns in seawater bodies and aquatic animals.
Keywords : Vibrio parahaemolyticus, Vibrio vulnificus, Antimicrobial resistance, Mesozooplankton