The First Detection of in Farmed Pacific Bluefin Tuna in South Korea, (Temminck and Schlegel, 1844).

The consumption of fish and shellfish worldwide is steadily increasing, and tuna is a particularly valuable fish species. However, infection caused by spp. is causing problems in many fish including the Pacific bluefin tuna (), and there is much controversy about the association of these infections with foodborne disease. In this study, using haematological and histological analyses of the blood and internal organs (liver, spleen, kidney, heart, stomach, intestine, gill, and muscle) of Pacific bluefin tuna cultured in South Korea, infection with Myxosporea was first identified, and molecular biological analysis was conducted. In this study, was finally identified. The Pacific bluefin tunas analysed in this study did not show any gross pathology lesions, such as visible cysts and/or myoliquefaction, of infection with this species. The histological analytical results can provide guidelines for the identification of . In the case of -induced infection, unlike other countries, such as Japan, there have been no reports in South Korea, and this study is the first to detect infection in Pacific bluefin tuna cultured in South Korea. The correlation between and food poisoning is not yet clear, however, it is thought that continuous observation of its infection is necessary.