Đã có ngày càng sử dụng thuốc và hóa chất trong nuôi tôm như nó đã được di chuyển từ thấp đến mức độ cao về tăng cường. | Tạp chí Nghiên cứu Khoa học 2006 70 -78 Trường Đại học Cần Thơ KHẢO SÁT TÌNH HÌNH SỬ DỤNG THUỐC - HÓA CHẤT TRONG NUÔI TÔM VÀ Sự TỒN LƯU CỦA ENROFLOXACIN VÀ FURAZOLIDONE tRoNG tôm sú Penaeus monodon Huỳnh Thị Tú 1 Nguyễn Thanh Phương1 Frédéric Silvestre2 Caroline Douny3 Châu Tài Tảo1 Guy Maghuin-Rogister3 và Patrick Kestemont2 ABSTRACT There has been an increasingly use of drugs and chemicals in shrimp farming as it has been moving from low to high level of intensification. The results of the investigation of 60 shrimp farming and drug and chemical stores in Soc Trang and Bac Lieu provinces showed that there were 74 kinds of drugs and chemicals used in shrimp farimg of which there were 19 antibiotics. The accumulation and elimination kinetics of enrofloxacin fluoroquinolones and furazolidone nitrofuran residues in shrimpmuscle were conducted both in tanks and in improved extensive and intensive ponds. Shrimps were treated with medicated feed of 4 g kg feed during 1 week followed by a recovery were sampled at different time and analyzed for residues by liquid chromatography mass spectrometry LCMS-MS . Results showed that in tank condition enrofloxacin and furazolidone residues were increasing during one week of contamination. The maximum concentrations of AOZ furazolidone metabolite and enrofloxacin were 874ppb and 441 ppb respectively. After 28 days of decontamination the concentration of AOZ dropped to 115ppb and the concentration of enrofloxacin dropped to . Whereas the maximum residue levels for enrofloxacin and furazolidone have been set at 100 ppb and 0 ppb respectively. Enrofloxacin was not detected either in improved extensive or intensive shrimp farm after 1 week of decontamination. The present study suggests that time needed before enrofloxacin disappears from shrimp muscle tissue is about 2 weeks in farm condition and furazolidone should not be used. Keywords enrofloxacin furazolidone residue back tiger shrimp Title Investigation on .
