致病性

This genetic and phenotypic heterogeneity has importantpractical consequences for a number of human interests, includingantibiotic or biocide resistance, the productivity and stabilityof industrial fermentations, the efficacy of food preservatives,and the potential of pathogens to cause disease.

这种遗传和表型异质性已成为部分人类利益的重要性，包括抗生素或生物杀灭剂抗性，工业发酵的产量和稳定性，食品防腐剂的效能和潜在的病原体致病性。

Use of biocides can also alter the pathogenic properties of plaque.

使用某些化学制剂，可改变菌斑的致病性。

The calf diarrhea is the clinical disease of familiar of the pathogenic E. coli infect calfs.

犊牛腹泻是由致病性大肠杆菌感染犊牛引起的一种常见临床疾病。

Kinds of specific sIgA against EPEC were identified from 9 colostrums by Wester-blot.

Wester-blot鉴定9份初乳中含有3种对肠致病性大肠埃希菌的特异性sIgA。

Was isolated from the diseased leaf of Cynodon hybrid in Red Lotus Lake golf courses in E-zhou. Pathogenicity was tested by inoculating the leaf with mycelium plug of Curvularia sp., the result indicated that Curvularia sp. isolate was the pathogen.

研究结果如下：从鄂州红莲湖高尔夫球场的狗牙根发病植株叶片上分离菌株Curvularia sp。，用菌丝块接种狗牙根叶片进行致病性测定，证实Curvularia sp。

The results showed that E.stigmosa was mild pathogenic for goslings.

结果表明，多斑艾美球虫对家鹅致病性较小。

The progress levels of symptoms after pathogen infection showed that interaction of gray leaf spot pathogen and host has differentiation or polymorphism. The progress levels of symptoms is different.The aggressively has polymorphism. The pathogenicity of different isolates in same cultivar has polymorphism, or the host reaction type of same isolate in different cultivars has polymorphism.The host reaction type has differentiation. There are seven types of host reaction in cultivar and inbred after infected by GLS pathogen:Rectangular lesion without chlorotic halo, Rectangular lesion with chlorotic halo,Irregular lesion without chlorotic halo,Irregular lesion with chlorotic halo, Spot lesion with chlorotic halo,Rectangular and irregular lesionand Rectangular and spot lesion. The host reaction type is coalesced lesion when disease severely. Frequency of each reaction types is different.

通过对玉米灰斑病菌侵染后的显症过程的系统观察，可在组织水平上说明该病菌与寄主互作反应存在分化或多样性：玉米灰斑病菌不同菌株侵染后显症过程表现出明显的差异；玉米灰斑病菌在侵袭力上存在多样性，菌株间对同一种品种的致病性表现多样化，或者同一菌株对不同品种侵染引起的寄主反应表现为多样性；病斑反应型的分化，玉米灰斑病菌侵染玉米品种或自交系后，主要有7种病斑反应类型，即RH型、RN型、IRH型(不规则形具褪绿晕圈病斑)、IRN型(不规则形无褪绿晕圈病斑)、SH型、RI型(长矩形与不规则形混合病斑)和RS型(长矩形与斑点形混合病斑)，若发病严重，病斑连成片，而且这些反应类型出现的频率也不同。

To obligatory pathogens like Pseudoperonospron cubensis, it could not only hold back the infection of hypha,but also heal the spot where infected by hypha.(8)The study on mechanism of action showed that the crude extract of S-5210 had a strong inhibition of the mycelia growth and spore germination which led to some abnormal growth such as the twisted and inflated mycelia, the abnormal increased branching, the broken mycelia wall and leakage of cytoplasm from hyphal tips.Alao the spores and the rate of germination were decreased, the germ tube was malformed in shape et al.The pathogenicity of hypha and spore was weakened.

8S-5210 活性产物的拮抗机理初步研究表明：S-5210 粗提物能强烈抑制病原菌菌丝的生长和孢子的萌发，引起病原菌菌丝扭曲或膨大、分枝增多、分枝顶端细胞壁破裂、原生质外溢；分生孢子数减少，孢子萌发率降低，芽管畸形等异常现象；菌丝和分生孢子致病性减弱。

ANALOGIES are often drawn between the fields of computer science and biology. The information-processing abilities of DNA are a form of natural molecular computing, and computer viruses leap from machine to machine in ways reminiscent of their disease-causing namesakes. At the International Solid-State Circuits Conference in San Francisco this week, a trio of mighty information-technology firms—Sony, Toshiba and IBM—pushed the analogy a little further. They unveiled a much anticipated new computer chip, four years in the making, the very name of which is a biological metaphor: the Cell.

人们经常把计算机科学和生物学进行类比，DNA的信息处理能力是一种自然分子的计算形式，而计算机病毒则让人想起致病性生物病毒，从一台机子感染另一台机子，而这个星期，信息技术的三巨头——索尼、东芝和IBM在旧金山召开的国际晶体管集成电路会议上，把两者间的这种类比作了进一步的推进，他们披露了一种已经研制了四年的、非常有希望的新型计算机芯片，这种芯片的名字来自生物学：细胞。

Phylogenic analysis based on entire S1 gene sequences showed that majority isolates clustered together with the close phylogenetic relationships. Therefore, we researched pathogenicity of the selected isolate IBV CK/CH/LDL/05II in this group, Pathogenic study showed that this virus caused 100% morbidity and 54.5% mortality to 15-day-old specific-pathogen-free.The kidneys from the dead chickens showed the predominant gross lesions which were pale, mottled, and swollen. The renal tubules and ureters were distended with excess urates.

经S1基因系统进化树分析发现，本实验所分离的大多数IBV毒株(8/12)分布于同一基因进化群内，并且亲缘关系较近，因此，我们对此群中IBV毒株CK/CH/LDL/05II的致病性进行研究，以10~(5.5)×EID_(50)/0.1ml的病毒接种15日龄的SPF雏鸡，鸡群发病率为22/22(100%)，死亡率为12/22(54.5%)，死亡鸡以肾脏肿大、苍白、外观呈现典型的&花斑肾&，肾小管和输尿管扩张并且有尿酸盐沉积为主要病理变化。

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。