In August, follow-up testing of paired-serum samples found a fourfold rise in neutralization antibody titer for H5N1, a test result which meets the WHO criteria for laboratory confirmation.
在8月，配对血清样本的后续检测发现H5N1中和抗体效价增加4倍，这是符合世卫组织实验室确诊标准的检测结果。
Test results, using two different assays, showed high antibody titer for H5N1 on consecutive serum samples taken on days 11 and 15 of his illness.
利用两种不同测定法进行的检测结果显示在他发病第11天和第15天采集的连续血清样本的H5N1抗体效价高。
The serum of the immunized ducklings were collected and the antibody titer were measured by neutralizing test.
同时对免疫的雏鸭采血，中和试验测定血清的效价。
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