致病力

RAPD分析能区分1号4号生理小种，菌株的地理来源，致病力；

RAPD analysis could detect race 1 and 4 , geographic origin of isolates , and pathogenicity ;

Hp是目前认识到最有基因多态性的一种微生物，基因型的不同可能导致致病力的不同。

Hp is recognized as a kind of microorganism possessing genetic polymorphism , and different genotypes may lead to difference in pathogenicity .

腺胃病变型鸡传染性支气管炎病毒分离株（IBV-D971）对SPF鸡的致病力试验

Virulence Test on SPF Chickens Using a New Avian Infectious Bronchitis

结论：1.宫颈病变的发展不依赖HPV感染亚型种类的多少，而取决于HPV亚型的致病力。

The development of cervical lesions did not depend on the types of HPV , but for the pathogenicity .

H5N1亚型禽流感病毒NS第263~277位核苷酸缺失提高病毒对鸡的致病力

The deletion of nucleotides of NS gene from 263 to 277 of H5N1 increases viral virulence in chicken

测试了12个致病力不同的Xanthomonasoryzaepv。

Twelve strains with different pathogenicity of Xanthomonas oryzae pv . oryzae were tested .

表达短lef-1dsRNA的转化细胞对家蚕核型多角体病毒的抗性核盘菌中dsRNA种类及其与致病力的关系

Resistance to BmNPV of Transformation Cells Expressing Short lef-1 dsRNA

为进一步在PA上寻找其影响致病力的关键位点，我们拯救出一系列PA突变的病毒，并且做了感染家鸭实验。

In order to pinpoint the key amino acids that affected virulence , we generated many PA mutant viruses and tested them on ducks .

为防制这一高致病力IBD的发生，一些新的免疫方法迎应而生。

This has led to some novel approaches to preventing this highly virulent form of IBD .

目的：了解伯氏疟原虫氯喹敏感株（N）和抗性株（RC）红内期虫体在抗药性、致病力和诱导免疫应答方面差异的形态学基础。

Objective : To understand the morphologic foundation for differences in drug-resistance , virulence and immunity between chloroquine-sensitive ( N ) and chloroquine-resistant ( RC ) strains of Plasmodium berghei .

推导氨基酸的序列分析表明，其HA蛋白裂解位点的氨基酸序列为-GR-GLF-，仅包含1个碱性氨基酸（R-）残基，符合低致病力AIV的基因特征。

The single basic amino acid at the cleavage site of HA implies the low pathogenic characteristics of the virus isolates .

EM对稗草致病力强，但孢子产量低，而CL孢子产量高，但对稗草的致病力弱。

EM strain had high virulent to barnyardgrass but low spore yield , while the CL strain had high spore-yield but low virulent to the weed .

GPV野毒株鉴定及其致病力试验

Identification & Pathogenic Test on a GPV Wild Strain

江苏省小麦赤霉病菌优势种&禾谷镰刀菌FusariumgraminearumSchwabe的致病力

Virulence of a predominant pathogen Fusarium graminearum Schwabe causing wheat scab in Jiangsu Province

方法：本文调查了213例肝病患者的HGV感染情况和分析了HGV感染的致病力。

Methods : The clinical epidemic and virulence of HGV infection were researched in213 cases with liver diseases .

RAPD群的划分与地理来源、分离寄主、致病力、交配型及甲霜灵抗性水平等表型特征均无明显的相关性。

No correlation was obviously found between the RAPD groups and the groups defined by geographic origin , host , virulence , mating type as well as metalaxyl resistance .

致病力明显降低，对小白鼠的半数致死量大于1.0×108CFU（ColonyFormingUnits）。

In addition , the pathogenicity capability was greatly decreased and the 50 % lethal dose for mice was more than 1.0 × 108 CFU ( colony forming units ) .

为评估H5N1亚型禽流感病毒在实验室环境下对鸭的致病力，本研究以无特殊病原（SPF）鸭为模型，对我国近年分离的7株病毒进行了致病力分析。

To evaluate the virulence of the H5N1 influenza viruses in the experimental set , we tested 7 H5N1 viruses in special pathogen free ( SPF ) ducks .

麦类纹枯病防治研究&Ⅰ.大小麦及其轮作物丝核菌（Rhizoctoniaspp.）的生物学特性与致病力比较

Studies on control of Wheat Sheath Blight I. comparison of biology and virulence of Rhizoctonia spp . On wheat , barley and their rotation crops

ISSR遗传聚类组群的划分与菌株的地理来源有明显的相关性，但与菌株的致病力差异、菌株的生长速率都没有明显的相关性。

The ISSR clustering groups had obvious correlation with geographical origin of the isolates , but had no significant correlation with growth rate and pathogenicity variation .

而结构蛋白VP2构象的变化可进一步影响ADV的致病力等相关生物学相关特性。

Furthermore , the change on the configuration of the structure protein VP2 could do effect on pathogenicity of ADV.

B9R2的黑色素产生能力和致病力与亲本B9菌株相同。

There was no significant difference between B9 and B9-R2 in melanin production and pathogenicity .

采用共培养法测定了生防菌ANTI-8098A对青枯雷尔氏菌强致病力菌株F-01-V和无致病力菌株F。

The inhibitions of the biocontrol bacterium strain ANTI-8098A ( Bacillus cereus ) against Ralstonia solanacearum virulent strain F-01-V and avirulent strain F.

为了确定水稻纹枯病菌的致病力分化与其遗传差异的相关性，对25个分离菌的致病力、可溶性蛋白电泳及由RAPD得到的DNA指纹图谱进行了分析。

To identify the correlation between the variability in virulence and the hereditary differentiation of rice sheath blight fungus , 25 isolates were analyzed for virulence and electrophoretic profiles of soluble proteins , as well as the DNA fingerprinting by RAPD .

virR基因的致病力无疑是最强的。

There is no doubt that virR has the strongest pathogenicity .

一个新的ANK蛋白基因在病原真菌的菌丝生长和致病力中起着重要作用

A novel ANK protein plays an important role in growth and pathogenicity of plant pathogenic fungi

对LD50实验结果进行双因素方差分析（tw。一wayAnova），表明菌体培养温度和鱼体养殖水温两者对该菌致病力都有显著影响（P0.01），其交互作用显著（尸0.01）。

Two-way ANOVA analysis of the results of 4-d LD50 test showed that both temperatures significantly affected the virulence of E. tarda ( P0.01 ) and the interaction between them was also significant ( P0.01 ) .

同属于AG-4融合群的36个菌株也具有明显的致病力分化现象。

The virulence of 36 isolates belonged to AG-4 group were significantly different .

迄今公认的鸡艾美耳球虫病的病原有9种，其中柔嫩艾美耳球虫（E.tenella）为致病力最强的球虫之一。

There are 9 species of chicken coccidia and the most virulent specie is Eimeria tenella ( E. tenella ) .

即人们需要感染一种致病力弱的HSV，这种病毒足以激发持久的免疫反应，但又不足以致病。

In other words , people would be infected with a very weak form of HSV , one that is sufficient to trigger a sustained immune response but too frail to trigger disease outbreaks .