青霉素又名盘尼西林,是一种含有氮和硫的有机酸,通常以钠盐或钾盐的形式存在。为易溶于水的白色结晶粉末;链霉素是链丝菌属的链丝菌培养液中提取的一种抗菌素,为易溶于水的白色或淡黄色粉末,有潮解性。两者的作用主要是抑制细菌的生长和繁殖,抗菌作用优于磺胺类药物,有很好的防治鱼病的作用。 Penicillin, also known as penicillin, is an organic acid containing nitrogen and sulfur, usually in the form of sodium or potassium salts. Is a water-soluble white crystalline powder; streptomycin is an antibacterial substance extracted from streptococcus of Streptomyces, which is a white or light yellow powder which is easily dissolved in water and has deliquescence. Both the role of the main inhibition of bacterial growth and reproduction, antibacterial effect is superior to sulfa drugs, there is a good role in the prevention and treatment of fish diseases.