查询词典 pathogenic factor

The researchers found that the central genes or 'backbone' of the H9N2 virus that infects guinea fowl can protect birds and mice against highly pathogenic strains of influenza.

研究员们发现感染几内亚鸟类的H9N2病毒的核心基因或者主干基因可预防鸟类和鼠类感染高致病的流感病毒株。

Aiming at the two major migrating routs of wild birds in China, the ecological distribution and prevalence of avian influenza were studied based on the investigation and analysis of the occurring and relative influential factors of highly pathogenic avian influenza, serology of free birds of HAPI areas were investigation and analysis, live stocks and poultries of some areas of Heilongjiang province were investigation and analysis, the HA gene of avian influenza virus A/Goose/XJYL/10/2003HA(H_5N_1)isolated from Xinjiang goose were cloned and sequenced, NS gene of avian influenza viruses (H_5N_1) isolated in Xinjiang were also cloned and sequenced.

本文在调查、分析禽流感发生情况以及影响疫情相关因素的基础上，针对我国野鸟迁徙的2条主要路线，对我国禽流感病毒生态分布和禽流感流行现状的研究，对爆发高致病禽流感疫区的自主活动鸟类禽流感的血清学调查与分析，对黑龙江省部分地区散养畜禽流感病毒感染的血清学调查与分析，并对鹅源H5N1亚型禽流感病毒新疆分离株A／Goose／XJYL／10／2003HA基因的克隆和序列测定与分析，对H5N1亚型禽流感病毒新疆株NS基因的克隆和序列分析。

Results toxic test and ld 50 test showed that nata de coco strain was free from toxin.quality control system has not been established and sanitary facilities were incomplete in most fac-tories.totally54samples of nata de coco were hygienically determined.the pollution level of elements of pb,as,nitrate and nitrite was low,but chromium was relatively higher.no aflatoxin b 1 and pathogenic bacteria were detected.the residual hydrogen peroxide were detected from15out of the18samples detected.

结果 菌种毒力试验和急性毒性试验（ld 50 ）显示为无毒物；多数企业未建立卫生管理制度，卫生设施不完善；采集54份椰果样品做卫生学检测，铅、砷等重金属元素、硝酸盐、亚硝酸盐污染水平较低，铬含量相对较高，未发现黄曲霉毒素b 1 和致病菌的污染；18份椰果样品中有15份残留过氧化氢。

The hygienics indexes were compared between individual workshops and manufactories, including physics and chemistry, pesticides, plant growth regulaors, food additives, pathogenic microorganisms and sulfite contents （on the basis of SO2 , the same below）, and so on.

方法通过卫生学调研，对比分析工厂生产豆芽和小作坊孵化豆芽的理化、农药残留、植物生长调节剂、食品添加剂、致病微生物及亚硫酸盐（以SO2计、下同）等多项指标。

Based on the analysis, the pathogenic rate of the rice Zhe 173 to hybrid medium indicia rice, medium japonica rice and hybrid medium japonica was higher than others.

根据白叶枯病菌不同致病型菌株对参试品种致病率的分布情况分析，浙173菌株对杂交中籼、常规中粳稻和杂交中粳稻的致病率较高。

Objective To expiore the pathogenic mechanism of hemorrhagic fever with renal syndrome.Methods 2-3 days old inbred Balb/C suckling mice were inoculated intracerebrally with tissue suspension of soft parate petechia of HFRS patients and the HFRS virus RNA was tested in brain, lung and kidney tissues of sucking mice by nested PCR.

目的 探讨肾综合征出血热的发病机理方法 2～3天的近交系Balb/C乳鼠，脑内接早期HFRS重症患者软腭粘膜出血点组织悬液，用套式聚合酶链式反应检测乳鼠脑、肺及肾组织中的HFRS病毒RNA。

The results showed that typical FMD clinical signs produced in cattle inoculated intradermally with pathogenic FMDV after 48 h. The 3ABC antibody produced in these cattle were detected to be suspicious on the 3rd day, 3ABC antibody in the 1/4 cattle were positive on the 5th day, and the 4/4 were positive on the 8th day post virus inoculation; In 10 co-housed cattle (breeded with artificially infected pigs and sheep separately), no 3ABC antibody were detected on the 7th day and percent of positive 3ABC antibody was only 30%(3/10) on the 15th dpi (4/10 had clinical symptom).

实验表明，4头牛在舌面接种感染FMDV 48h后全数发病，第3天即出现可疑的3ABC抗体，第5天检测到阳性的3ABC抗体，至第8天3ABC抗体全部为阳性；10头同居牛（分别与接种感染猪和羊同居）在同居第7天时未检出3ABC抗体，在同居第15天时，3ABC抗体阳性率仅为30%；肌肉接种病毒羊3ABC抗体产生时间与接种病毒牛一致。

Koch publishes his Methods for the Study of Pathogenic Organisms in which he describes his success with solidified culture media.

科赫在病原生物研究一文中发表了他的方法，他在其中将自己的发明称为固体培养基。

The discovery of penicillin so that the people of pathogenic micro-organisms from infection caused by various diseases are no longer at a loss, and thus the development of a large number of β-lactam antibiotics, for the protection of human health have made great contributions to the.

青霉素的发现使人们对由病原微生物感染而引发的各类疾病不再束手无策，并由此发展了大量的β-内酰胺类抗生素，对保护人类健康作出了巨大贡献。

The liqase was positively controlled by HAI and AI-2 to some extent. The lecithinase was negatively controlled by HAI-1, and the hemolysin was negatively controlled by both HAI-1 and AI-2. Special primers of luxS gene were designed from the luxS gene sequence of V. harveyi obtained from the GenBank, and the gene was amplified from a pathogenic strain V. harveyi VIB645 by PCR. The luxS gene was cloned to a cloning vector pUC, and was sequenced. It was found that the open reading frame is 519 bp. The similarity of the luxS gene from V. harveyi VIB645 to the published sequence of V. harveyi strain in GenBank was only 90%.

从GenBank中获取哈维氏弧菌中编码AI-2合成酶的luxS基因序列设计一对特异性引物从哈维氏弧菌VIB645中PCR扩增luxS基因，将luxS基因克隆于pUC载体并测序，发现其与GenBank中已发表的哈维氏弧菌的luxS基因序列相似性为90%，证明LuxS/AI-2系统在哈维氏弧菌不同的菌株中的具有一定的特异性，推测LuxS/AI-2系统可能与哈维氏弧菌的致病性或发光现象有关。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。