Abstract

A bacteriological survey in cultured scallop Argopecten irradians was conducted in Jaran bay, Korea from April, 2016 to January, 2017. A total number of 32 Vibrionaceae isolates were collected, dominantly. All isolates were phenotypically characterized and then identified with sequencing of the 16S rDNA and rpoA gene. A fifth species of Vibrionaceae were identified as Vibrio harveyi (8 strains, 25.0%), Vibrio alginolyticus (4 strains, 12.5%), Vibrio mediterranei (3 strains, 9.4%), Vibrio shilonii (3 strains, 9.4%) and Vibrio chagasii (3 strains, 9.4%), Photobacterium jeanii (2 strains, 6.3%), Photobacterium swingsii (1 strains, 3.1%), Vibrio artabrorum (1 strains, 3.1%), Vibrio cyclitrophicus (1 strains, 3.1%), Vibrio fortis (1 strains, 3.1%), Vibrio owensii (1 strains, 3.1%), Vibrio parahaemolyticus (1 strains, 3.1%), Vibrio Pelagius (1 strains, 3.1%), Vibrio splendidus (1 strains, 3.1%), Vibrio zhanjiangensis (1 strains, 3.1%). In the aquacultured scallop Argopecten irradians, Harveyi clade is a major clade including by V. harveyi (3), V. alginolyticus (3) and V. parahaemolyticus (1). Most of detected all bacteria were vibrio species that are associated with bivalve molluscs in commensal or pathogenic relations.