不致病的

We didn't know it was possible to unleash this kind of pathogenic potential in the mosquito, Myles said.

我们不知道有可能引发这种致病潜力的蚊子，迈尔斯说。

Wild waterfowl are the natural reservoir of all influenza A viruses, and these viruses are usually nonpathogenic in these birds.

野生水鸟是所有甲型流感病毒的自然储存宿主，通常这些病毒对它们不具有致病性。

Wild waterfowl are the natural reseroir of all influenza A iruses, and these iruses are usually nonpathogenic in these birds.

野生水鸟是所有甲型流感病毒的自然储存宿主，通常这些病毒对它们不具有致病性。

The virus isolates' pathogenicities varied from completely nonpathogenic to highly lethal and were positively correlated with tracheal virus titers.

不仅如此，其中8个病毒株通过接触能够有效感染新的野鸭并能够在其体内大量复制而不表现致病性。

As for those intestinal parasitosis caused by roundworm,hook-worm'pinworm and tapeworm'it was clearly understood that those dis-eases were related to the parasites lodging in the body and that their OC-currenee was connected with unclean foodstuffs.

3对蛔虫、钩虫、蛲虫、绦虫等肠寄生虫病，人们更明确认识到由这些寄生虫寄生在人体而致病，它的发病与饮食不洁有关。

However, so far, their pathogenic factors are poorly defined.

但是到目前为止他们的致病因子，还不甚了解。

The main amblyogenic factors as sfrabismus, anisometropia, ametropia and so on, corresponding with the observed indexes were respectively definited for quantitative analysis of photos and for standardized diagnose of the retinoscopy results, then analysed and evaluated the results according to the standards.

针对屈光不正、屈光参差、斜视等主要弱视致病因素拟定观测指标及相应的照片量化分析标准和临床诊断标准，应用标准分析法进行评价。

Rheumatoid arthritis is an extravascular immune complex disease with chronic joint inflammation of unknown etiology.

类风湿性关节炎(rheumatoid arthritis， RA)为一种血管外的免疫复合性疾病，引发慢性关节发炎，其致病机转尚不甚清楚。

Ataxin-1 is another pathogenic protein which causes a disease called spinocerebellar ataxia, which is also an incurable hereditary nervous disorder.

Ataxin-1是另一种致病蛋白，它能够引起脊髓小脑性共济失调，也是一种不能治愈的遗传性神经系统疾病。

Results No apparent cytopathic effects could be observed during the first 24 hours of infection with L-form and elementary bodies, but the cytoplasm of some MA104 cells became vacuolated when the L-forms entering into the cells as shown by immunohistochemical staining and PCR.

结果 发现金葡菌L型及滤过的原生小体对细胞致病性降低，细胞不出现明显病变，部分细胞出现空泡样变，免疫组化及金葡菌PCR显示感染细胞内出现金葡菌抗原及DNA。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。