median dose lethal

The ratio of epr1+ epr2+ epr3+ gneJ+ is highest. A representative strain in five virulence genotypes was chosen to detect proteolytic activity, haemolysis, cell toxicity and median lethal dose of mice.

本试验从每个毒力基因型中选取一株代表菌株，进行了溶血性、溶蛋白活性、细胞毒性及小鼠半数致死量的研究。

Observe Single Leaf Asarum himalaicum's Acute Toxicity and Determination of its Median Lethal Dose

单叶细辛的急性毒性观察及半数致死量的测定

Metho ds: Mice acute toxicity test ( median lethal dose, minimum lethal dose, maximum tolerance dose);

方法：小鼠急性毒性实验（半数致死量、最小致死量、最大耐受量）；

Crawfishes ( Cambarus proclarkii) as animal were infected with white spot syndrome virus ( WSSV) for studying various infection characters, including temperature, transfer route, successive infection, median lethal dose ( LD 50), immunity against virus and virus conservation etc.

应用克氏原螯虾作为动物模型研究对虾白斑综合征病毒（WSSV）的感染增殖特性，涉及感染温度、感染途径、继发感染、半数致死量（LD50）、免疫保护及保存期等。

There were significant differences in different strains of virulence genes type in hemolytic, proteolytic activity, cell toxicity and median lethal dose of mice.

不同毒力基因型的菌株在溶血性、溶蛋白性、细胞毒性及小鼠半数致死量方面存在明显差异。

Biological characteristics study of mutant Δ AcnAA series biological characteristics of Δ AcnA and WT, including genetic stability, growth curve, morphology, hemolytic activity, infections to cells and median lethal dose to mice were tested.

突变株ΔAcnA的生物学特性研究对ΔAcnA突变株和WT进行一系列生物学特性分析（遗传稳定性、生长曲线、形态结构、溶血活性、细胞感染实验和小鼠半数致死量）。