致病

To demonstrate experimentally the generation of velogenic NDV from a nonpathogenic waterfowl isolate, we passaged an avirulent goose isolate in chickens.

为了通过实验证明从水禽中分离的非致病型NDV可以转变为速发型病毒，我们通过在鸡体内传播鹅源性无毒力株，经气囊接种连续传代 9次，随后再在鸡脑内传代 5次。

Nevertheless, the eight virus isolates that were nonpathogenic in ducks replicated and transmitted efficiently to naive contacts, suggesting that highly pathogenic H5N1 viruses causing minimal signs of disease in ducks can propagate silently and efficiently among domestic and wild ducks in Asia and that they represent a serious threat to human and veterinary public health.

该现象提示高致病性流感毒株H5N1能够在野鸭或家禽体内迅速、隐匿复制而无明显表现，对人或家禽的健康安全构成严重威胁。您翻译的质量真不错，感谢您的参与我领第4单元。已完成。4单元译文。doc (27.5k)第10单元吧，可是我打不开，乱码，麻烦楼主发给我，邮箱已pm我领第七单元吧！我领第九单元吧！第七单元完成！

Objective To study the relationship between DNA fragments in ENV gene of SIVmac and viral replicating ability. Methods Reciprocal recombinants were constructed by replacing the clonable DNA fragments of ENV region of the nonpathogenic SIVmac142 clone with the pathogenic SIVmac 239 clone.

猴免疫缺陷病毒(simian immunodeficiency viruses SIV)是一组在致病性和毒力方面具有多样性的灵长类动物病毒，其中，SIVmac239克隆感染的猴表现为与人类AIDS相似的疾病，称之为致病株，而SIVmac142克隆仅引起猴发生病毒血症，不发生临床综合征，称之为非致病株〔1〕。

It is reported that nonfunctional tumorscause disease by compromising normal glandularfunction ,local extension ,or distant spread.

据报道，无功能性肿瘤通过使正常腺功能遭到破坏、局部扩张或向远处播散而致病。

This is the first nucleotide sequence of exogenous JSRV reported in China.

这是我国首次报道的具有致病性的外源性JSRV基因组全序列。

The results show that the patients with Chronic Obstructive Pulmonary Diseases had an increased risk of lung cancer.

进一步研究COPD和肺癌的共同致病因素，对这两种疾病的发生发展就有重要的意义。

The authors describe the characters of CAV from its epidemiology、path ology、diagnosis and treatment.

本文就近几年来，在该病的流行病学、致病机理、病原特征、诊断技术及防治方法方面的最新进展作一介绍。

Microbial infections of eye such as microbial keratitis, ocular onchocerciasis, bacterial endophthalmitis, viral retinitis and infectious uveitis are unfortunately common.

Toll样受体是自身免疫的关键受体，它参与宿主对致病微生物的识别和防御等感染免疫过程，也与人体的获得性免疫密切相关，是目前免疫学研究的重点和热点。

In the experiments of artificial infection three of four 12-day-old coccidia-free goslings were died after inoculated with mix oocysts of 5×10~4. Pure oocyst...

通过单种卵囊接种试验获得了5种球虫的纯种卵囊并对它们的一些生物学特征进行了观察，为这些球虫的生活史和致病性研究奠定了基础。

Assessment of disease mechanisms and to profile the optimum therapeutic strategy.

支援病因探讨的致病机转及治疗。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。