致病性

Dynamic gene mutation and the reassortment of genes have been considered as the key factors responsible for influenza A virus virulence and host tropism change.

动态的基因突变和基因重组被认为是流感病毒A的致病性和宿主趋向性改变的关键因子。

Conelusion:Missense mutation of Tyr486Asp in Exon 5 of UGT1A1 gene is the pathogenic factor of the CN Ⅱ case in the family and recessively inherited.

Tyr486Asp突变是本例CN—Ⅱ家系的致病性基因，该突变不影响UGT1A1基因启动子区苯巴比妥酸的应答元件，其遗传规律符合常染色体隐性遗传。

Missense mutation of Tyr486Asp in Exon 5 of UGT1A1 gene is the pathogenic factor of the CNⅡ case in the family and recessively inherited. The mutation has no influence on the response elements of phenibarbital in the promoter region.

Tyr486Asp突变是本例CN-Ⅱ家系的致病性基因，该突变不影响UGT1A1基因启动子区苯巴比妥酸的应答元件，其遗传规律符合常染色体隐性遗传。

In this study, naturally occurring HBV strains were used to study the mechanisms of enhanced replicative efficiency.

近年来发现，除机体免疫应答外，HBV毒株的生物学特性与致病性相关。研究表明HBV复制增强常导致毒力增强。

A few percentage of Rhodococcus equi (1.9%) were also found. The cause about high value of pH T-VBN TVC and the latent disease hazards of survival bacteria flora should be further surveyed.

产品pH值、T-VBN值、菌落总数较高的原因和残存细菌的潜在致病性危害有待进一步研究。

Backgrand and Objective Leptospirosis is a spirochetal zoonosis that causes an acute febrile and systemic illness in humans caused by pathogenic Leptospira species.

背景和目的钩端螺旋体病是全世界流行的人兽共患病，致病性钩体侵入人体后能引起急性发热和全身各系统的疾病。

Vitelline antibody has significant dissolving and weakening effect on sparozoite, but it has no effect on the speed of sporation of E. tenella, and pathogenicity of sporulated oocysts.

tenella的子孢子具有明显的溶解和致弱作用，但对卵囊的孢子化速率和孢子化球虫卵囊的致病性没有明显影响。

This study demonstrates the integral function of SA, particularly streptococcal DNA, in the pathogenesis of psoriasis.

该研究通过揭示链球菌抗原的生物学功能，发现non-NASA相比SA可显著降低银屑病患者PBMC增殖和T细胞活化，提示链球菌DNA可辅助活化致病性T细胞，诱导银屑病的发生与发展。

Trichophyton actions,and canida albicans,cryptococcus neoformans,aspergillusfumigatus.

本研究前文报道了竹醋液对10种致病性皮肤癣菌的抑菌和杀菌效果［6］。

State Key Labratory of Veterinary Biotechnology,Harbin Veterinary Research Insti tute,CAAS,Harbin150001

有关研究表明VP1是CAV 唯一的结构蛋白，VP2为辅助蛋白，与病毒的装配有关，而VP3是CAV的致病性蛋白［1］。

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。