Bài báo khoa học

Tilapia (Oreochromis sp.) is one of the key freshwater fish culture species, pointing domestic consumption as well as export requirements. However, Tilapia farming still faces many difficulties, including disease outbreaks and antibiotic management during farming. The study aims to provide initial data on disease status and antimicrobial used in tilapia farming areas in Hai Duong, Bac Ninh and Bac Giang provinces. The method of face -face interview with farmers according to the questionnaire was applied. The results showed that diseased fish have typical clinical signs such as cloudy eyes, pop eyes, fluid accumulation in the intestine/abdominal cavity or livers and kidneys, turn brown or black which are infected with a high rate (88.9100%) from May to August every year. Antimicrobial are commonly used to treat fish diseases, however the effectiveness of the treatment was low, although the dose has been increased 1.5-2 times compared to the instructions in the package and used continuously for 5-7 days for once use time. Amoxicillin is commonly used in Bac Giang and Hai Duong with the rate of 77.8 and 28.6%, respectively, while in Bac Ninh, the combination antibiotic Doxycycline + Florfenicol is popular with 55.6%.