致病性

PCV-1 is nonpathogenic for pigs,whereas Porcine circovirus type 2(PCV-2) is considered as the major causative agent of Postweaning multisystemic wasting syndrome in domestic pigs.

PCV-1对猪无致病性，而PCV-2被认为是引起断奶仔猪多系统衰竭综合征的主要病原。

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〕。

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。

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。

They affect the development of organismal characters such as sex determination,the functional determination of centromeres,the development of Drasophila's eys,the prion pathogenicity and cancer formation greatly.

它对生物体的性状发育如性别决定、着丝粒的功能决定、果蝇复眼发育、朊病毒致病性的获得及癌的发生等等方面有着重要的影响。

Last week Croatian scientists detected a bird flu virus in wild swans found dead at a fish pond about 50 km (31 miles) west of the biggest ornithological park in this part of Europe.

克罗地亚有关方面26日宣布，欧盟禽流感实验室的检测证实上周在克东部发现的野天鹅是死于高致病性H5N1型禽流感病毒。

The lab is capable of quarantine hazardous biology such as : Phytophthora sojea , Tilletia controversa , Bursaphelenchus xylophilus , Sorghum halepense , Acanthoscelides obtectus , Bean Pod mottle virus , and practising diagnosis akabane disease , leukaemia bovum,paratuberculosis and other hazardous animal disease;detection of listeria monocytogenes , staphylococcus aureus and salmonella etc in food;examination of transgenic products such as soybean , rapeseed , corn etc and detection of bovine ,sheep and goat -derived for preventing bovine spongiferm encephalopathy .

检测的项目主要有：大豆疫病、小麦矮腥黑穗病菌、松材线虫、假高梁、菜豆象、菜豆英斑驳病毒等植物危险性有害生物，赤羽病、白血病、副结核等动物危险性有害生物，单增李斯特氏菌，金黄色葡萄球菌，沙门氏菌等致病性食品微生物，大豆、油菜籽、玉米等转基因产品，以及预防疯牛病的牛羊源成分检测等。

While it does not seem to be highly pathogenic, human to human transmission has been observed.

尽管似乎不是高致病性的，但仍发生了人与人之间的传染。

Objective To study pathogenicity and clinical significance of candida albicans in respiratory tract specimen of patients with pulmonary tuberculosis.

目的 了解肺结核患者呼吸道标本中白色念珠菌的致病性并评价其分离的临床意义。

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。