致病性

Through a great number of field investigations and inoculation identifications, six corn varieties( Denghail, Jidan209, Dan639, Nongda3138, Benyu9) and two corn inbred-lines( Mo 17 and Huangzao4 ) widely popularized and used in Jilin province corn production and corn breeding now were defined as ideal differential hosts for pathogens of Sporisorium reilianum .They represented different resistant and susceptible level of corn to Sporisorium reilianum and were able to group the pathogen collections of Sporisorium reilianum from different corn-grown areas in Jilin.

经过大量的田间调查及人工接种鉴定，确定了登海1、吉单209、吉单180、丹639、农大3138、本育九、Mol 7和黄早四为较理想的玉米丝黑穗病鉴别寄主，初步建立了吉林省玉米丝黑穗菌致病性分化的鉴别寄主体系，该鉴别体系中的6个玉米品种及2个玉米自交系代表了吉林省正在推广使用的玉米品种资源和二大骨干自交系，对今后鉴定和监测病菌致病类型的分化具有重要作用。

On the base of upper studies, epidemiology and space-time distribution of HAPI were analyzed, the risk assessing frame of HPAI were established, the space-time model of air temperature which influenced the transmission of HPAI virus were analyzed and constructed, Bio-Math model for immunity and prevalence of avian influenza were establish.

在此基础上，对禽流感发生的流行病学分析，对高致病性禽流感时空分布规律的初步研究，从而初步建立了高致病禽流感传播的风险评估框架，分析并构建了温度对我国禽流感传播影响的时空模式，建立了禽流感免疫与流行的生物数学模型初析。

Strong gains in sales of diagnostic testing products will be driven by the rising numbers of food processor and government agency tests for pathogenic and nonpathogenic contaminants.

在诊断测试产品的销售强劲增长将产生推动作用的食品加工企业和政府机构测试上升的致病性和非致病污染物的数量。

The second and third group, which mainly contained very low virulent and nonpathogenic isolates, displayed high variation in both RAPD patterns and ITS sequences, compared with the first group.

第二、第三组与第一组在RAPD带型和ITS/5.8S区域序列上差异大，且致病性极弱或不致病。

Four field strains of Infections bursal disease viruses isolated in China during 1997～1999 were compared for their pathogenity and sequences in high variable region of vp2 genes.

对4个IBDV野毒株的致病性和它们的vp2基因高变区序列同时做了比较分析。结果表明， 4个IBDV毒株在致病性程度上存在较大差异。

Medical care and health institutions, anti-epidemicagencies and units engaged in the experimentationofpathogenic microorganisms must rigorously implementthe management system and the operation procedures stipulated by the health administration department under the State Council to prevent the iatric infection of infectious diseases, inside-hospital infection, laboratory infection and the spread of pathogenic microorganisms.

第十五条医疗保健机构、卫生防疫机构和从事致病性微生物实验的单位，必须严格执行国务院卫生行政部门规定的管理制度、操作规程，防止传染病的医源性感染、医院内感染、实验室感染和致病性微生物的扩散。

Medical care and health institutions, anti-epidemic agencies and units engaged in the experimentation of pathogenic microorganisms must rigorously implement the management system and the operation procedures stipulated by the health administration department under the State Council to prevent the iatric infection of infectious diseases, inside-hospital infection, laboratory infection and the spread of pathogenic microorganisms.

第十五条医疗保健机构、卫生防疫机构和从事致病性微生物实验的单位，必须严格执行国务院卫生行政部门规定的管理制度、操作规程，防止传染病的医源性感染、医院内感染、实验室感染和致病性微生物的扩散。

The toxin is a secondary metabolizable production in the pathogenic process of many pathogens,which can cause necrotic spot of the host. So it is a poisonous factor and it is important to the pathogenic activity.

毒素是许多亲和性植物病原菌致病过程中产生的次生代谢产物，离体使用可造成相应的寄主表现坏死斑反应，因此是病原菌的毒性因子，对决定病原菌的致病性有很重要作用。

It was showed that the growth speed of hypha, sclerotinia production and the pathogenicity of strains had little relation with host and geographical location. The ability of oxalic acid production of strains had positive relation with the pathogenicity. In order to study the nutrition aptness, 8 kinds of culture mediums were tested and the result showed that S.

sclerotinia不同菌株菌丝的生长速度、菌核产量、致病力与其地理来源和寄主来源关系不大，对12个代表菌株的草酸产生能力的测定表明，菌株的草酸产生能力和病菌的致病性基本呈正相关，致病力较强的菌株草酸产生能力较强；采用8种培养基对代表菌株营养条件进行了研究，结果表明核盘菌S。

Swine enteropathogenic E. colis were rejuvenescenced and 6 of them were selected to prepare blood serum. We had tested the reactance of cross agglutination and agar diffusion between the strains and the blood serums. No. 300 and No. 343 were selected because they had highly cross reaction. To test superantigen of No.300 and No.343, the antigens made by both of them immunized piglets, and then we detected the serum 0D values with indirect ELISA. The OMP and PF of No. 300 and No. 343 were extracted for SDS—PAGE and westen-blotting.

本研究针对10株猪致病性大肠杆菌，经复壮后选取致病性强的6菌株作为供试菌株，制备免疫血清与这6菌株的多种抗原分别进行交叉凝集试验和琼脂扩散试验，根据各菌株抗原的交叉反应程度，筛选出抗原交叉程度高的菌株300和343，检测两菌株超抗原的毒性作用，以不同方式制备抗原免疫仔猪，用间接ELISA检测免疫效果，并提取菌株300和343的外膜蛋白和渗透因子经SDS—PAGE及免疫印迹试验，进行相关分析。

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。