| 1. | The test gave consistently positive results with virulent virus .
用强毒病毒时，此试验恒定地呈现阳性结果。 |
| 2. | Some virulent strains of pvx cause rugosity go the leaves even crinkling, called pvx crinkle .
PVX的有些强毒株系引起叶子的粗缩甚至皱缩，叫做PVX皱缩。 |
| 3. | Diagnostic technique for virulent marek ' s disease virus infection of chickens
鸡马立克氏病强毒感染诊断技术 |
| 4. | Some virulent strains of pvx cause rugosity go the leaves even crinkling , called pvx crinkle
Pvx的有些强毒株系引起叶子的粗缩甚至皱缩，叫做pvx皱缩。 |
| 5. | There were six major open reading frames in genome of f48e9 strain which encode the viral np , p , m , f , hn and l protein , respectively
为了验证该6个碱基是否只存在于强毒株及其与毒力的关系，我们又设计一对引物x1和x2 。 |
| 6. | Among 31 strains , gx - 8 / 99 was the most virulent , which could cause as high mortality as 70 % - 94 % in the relatively wide ranges of ages
致病性最强的gx8 99可在易感年龄的spf鸡引起70 - 92的死亡率，是典型的超强毒。 |
| 7. | Indirect immuno - fluorescent assay and enzyme linked immunosorbent assay ( elisa ) showed that the expressed protein was reactive with chicken anti - ibdv serum
Dna疫苗对bc6 85 、 zj2000 、 zj991等3株强毒株具有良好的免疫保护效果，平均保护率达83 |
| 8. | The rpoifn - ct antiviral activity was assayed by inhibition of the cytopathic effect ( cpe ) of vesicular stomatitis virus ( vsv ) on mardin darby bovine kidney cells ( mdbk ) or other cell lines
并进一步在pk - 15细胞上进行抗猪瘟病毒( hcv )石门系( sm )强毒的试验。 |
| 9. | The ha 1 gene was inserted into the bacterial plasmid pgex - 4t - 2 and the recombinant plasmids containing ha 1 gene were identified by restriction enzyme analysis and pcr mathod
结果表明同源性分别达到98和97 ，并且在ha1切割位点有多个碱性氨基酸的插入序列，证明其为强毒株。 |
| 10. | The results showed that samples confined non - virulent apmv - 1 can yield two bands of 123bp and 362bp , while those of virulent ndv can yield two bands of 254bp and 362bp
对强毒株可扩增出362bp的通用片段和254bp的强毒株特异性片段，弱毒株则可扩增出362bp的通用片段和123bp的弱毒株特异性片段。 |
