阳性标准 meaning in English

positive criteria

Experiment shows that the antigen extracted by autoclave is best for dot - ppa - elisa . applying the x2 test , optimal concentration of antigen was determined , and the optimum dilution of enzyme hrp - spa was 1 : 10 . the high specificity of dot - ppa - elisa was proved by the specific blocking test , and also by the cross - reaction test in which the diaphragm does not react with the antibodies against salmonellosis , pasteurellosis , chlamydiosis , hcv , ppv , brucellosis , erysipelas suis , colibacillosis , prv
试验中对多种方法提取的诊断抗原进行了比较、筛选；确定了dot - ppa - elisa的最佳工作条件；测定了st - 171株的免疫猪血清抗体及c群、 2型人工感染猪血清抗体效价，并初步确定了该方法的阳性标准。
Different kinds of salmonella antigens have been tried and an improved heat - extracted antigen was used as the diaphragm antigen . the optimum condition of dot - ppa - elisa was determined . the antibody positive standard of salmonella infection was established as 1 : 32 , and the positive standard of protecting pigs from salmonella infection as 1 : 512
研究中对多种方法提取的沙门氏菌抗原进行了筛选，选取了特异性良好的抗原；确定了dot - ppa - elisa的最佳工作条件；初步确定了感染仔猪副伤寒的dot - elisa抗体阳性标准为1 ： 32 ，猪只抵御副伤寒感染的dot - elisa抗体保护标准为1 ： 512 。