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抗菌素的单位定义抗菌素的效价通常以单位来表示。经生物检定,具有一定生物效能的最小效价单元就叫做“单位”(U),经由国际协商规定出的标准单位,称为“国际单位”(IU)。各种抗菌素的单位定义大致有如下几种。1.重量单位:即以抗菌素的生物活性部分(纯盐基或纯游离酸)的重量作为单位。如链霉素盐基1μg=1单位,1mg=1000μg=1000单位,1g=1000mg=1000000μg=1000000单位。不管是链霉素硫酸盐或是链霉素氯化钙复盐,只要单位量相等,则所含链霉素量是相等的。除链霉素外,双氢链霉素(硫酸盐)、土霉素(盐酸盐)、卡那霉素(硫酸盐)、紫霉素(硫酸盐)、新霉素(硫酸盐)、红霉素碱、红霉素(乳糖酸盐)等,均以有抑菌效能部分(盐基纯品)的重量1μg等于1单位计算。同样,新生霉素不论何种制品,均以有抑菌
Antibacterial unit definition Antibacterial potency is usually expressed in units. The smallest unit of titration that has been biologically determined as having a certain biological potency is called “unit” (U), a standard unit stipulated by international consultation, called “International Unit” (IU). The definition of various antibiotic units is as follows. 1. Weight unit: that is, the biologically active portion of antibiotics (pure salt or pure free acid) as a unit. Such as streptomycin base 1μg = 1 unit, 1mg = 1000μg = 1000 units, 1g = 1000mg = 1000000μg = 1000000 units. Whether streptomycin sulfate or streptomycin calcium chloride double salts, as long as the unit amount is equal, the amount of streptomycin contained is equal. In addition to streptomycin, dihydrostreptomycin (sulphate), oxytetracycline (hydrochloride), kanamycin (sulphate), viomycin (sulphate), neomycin (sulphate) Erythromycin alkaloids, erythromycin (lactobionate), etc., are calculated with a unit of 1 μg equal to 1 μg of the bacteriostasis-inhibiting fraction (pure base). Similarly, no matter what kinds of products, noobomycin, are antimicrobial