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1 土霉素(又名四环素) 性状与作用:土霉素为黄色晶体,无臭、味略苦,性稳定,易溶于水。其主要作用是抑菌,高浓度时有杀菌作用。土霉素对鱼类的最低抑菌浓度为0.31～10μg/ml,多数为0.31～1.25μg/ml。治病范围广,毒性小,细菌耐药力产生很慢。肠道对其吸收很快,排出也快。使用方法:药物拌入饵料内服,预防剂量,每千克鱼每天给药2—10mg,连喂3—7天;治疗剂量每千克鱼每天3—7天。可防治白皮病、腐皮病,疖疮病、鳗鱼赤鳍病、鲤鱼竖鳞病、烂鳃病等。注意事项:此药在碱性条件下即分解失效。 2 红霉索性状与作用:红霉素为灰白晶体,碱性,与有机酸结台成盐,难溶与水。在碱
1 oxytetracycline (also known as tetracycline) traits and effects: oxytetracycline yellow crystals, odorless, slightly bitter taste, sexual stability, soluble in water. Its main role is antibacterial, high concentrations of bactericidal effect. The minimum inhibitory concentration of oxytetracycline on fish was 0.31 ~ 10μg / ml, the majority of 0.31 ~ 1.25μg / ml. A wide range of treatment, toxicity, bacterial resistance is very slow. Intestinal absorption of its fast, fast discharge. Usage: Drugs mixed with bait orally, the dose of prophylaxis per kilogram of fish daily dose of 2-10mg, even feeding 3-7 days; treatment dose per kilogram of fish 3-7 days a day. Can control white skin disease, skin disease, scabies disease, eel fin disease, carp vertical scale disease, rotten gill disease. Note: This drug is decomposed in alkaline conditions failure. 2 erythromycin cable traits and effects: Erythromycin is gray crystals, alkaline, with organic acid junction Taiwan salt, insoluble and water. In alkali