Identification and Control Methods of Vibriosis in Farmed Red Sea Bream

    Vibriosis, also known as ulcer disease, is divided into summer vibriosis and low-water-temperature vibriosis. Vibriosis occurring during the high water temperature period in summer is summer vibriosis. It is manifested as hemorrhagic erosion and ulcers on the body surface of the fish; in diseased fish, anal bleeding, swelling and ascites can be seen. Low-water-temperature vibriosis occurs from late autumn to winter, especially when the surface water temperature drops sharply by 2 to 3°C. Diseased fish show hemorrhagic erosion and ulcers on the body surface, and feed-related disorders such as yellow fat disease are commonly present. The measures for preventing and treating vibriosis in red sea bream are: for vibriosis occurring in summer and vibriosis occurring in winter, oxytetracycline can be administered orally at a dose of 50 mg per kg per day mixed into the feed, fed continuously for 7 to 10 days; however, for low-water-temperature vibriosis, in addition to oral oxytetracycline, a multivitamin complex should also be administered. In late summer, do not feed spoiled or poor-quality feed, and strengthen feeding management.