疾病传播

Starting with the same number of resistant and nonresistant mosquitoes, they found that after nine generations the resistant type made up 70 percent of the population -- raising the possibility of replacing regular mosquitoes with resistant ones that don't spread disease.

实验开始时放置相同数量的免疫的和未免疫的蚊子，他们发现在繁殖九代之后，未免疫的占据了蚊子总数量的70％――这提升了用不传播疾病蚊子来取代传播疾病蚊子的可能性。

There are lots of uncertainties concerning the SARS epidemiological rules, pestiferous routes and the control methods till now. Therefore, it's important to understand the life cycle of SARS CoV since it could provide us some information on prevention of the SARS.

目前，人们对SARS CoV的了解、研究还远不够，对该病毒引起的SARS疾病的流行规律、具体传播途径、疾病的控制等还存在众多的疑问，本文的研究可为了解SARS CoV的生命规律，阻碍SARS CoV的传播，防治SARS提供依据。

The proportion of bloodborne or venereal infectious diseases increased,and AIDS occurred.

血源和性传播疾病构成有所升高，其中性传播疾病的发病明显升高，并出现了艾滋病病例。

The syphilis is one kind of dissemination disease which syphilitic spirochaeta spirochetes spirochaeta pallida causes by, is one kind of whole body chronicity infectious disease.

梅毒是由梅毒螺旋体引起的一种性传播疾病，是一种全身性慢性传染梅毒是由梅毒螺旋体引起的一种性传播疾病，是一种全身性慢性传染病。

The syphilis is one kind of dissemination disease which syphilitic spirochaeta spirochetes spirochaeta pallida causes by, is one kind of whole body chronicity infectious disease.

梅毒是由梅毒螺旋体引起的一种性传播疾病，是一种全身性慢性传染病梅毒是由梅毒螺旋体引起的一种性传播疾病，是一种全身性慢性传染病。

Kuru and vCJD belong to the same family of neurodegenerative conditions known as transmissible spongiform encephalopathies, affecting both humans and animals. Prion diseases are characterized by accumulation in the brain of an abnormal isoform of glycoprotein called prion protein, Dr. Collinge and colleagues write. It's thought that this protein is the agent of transmission in these diseases.

Kuru 和vCJD属於同一种神经退化性状况，已知为具传播性之海绵状脑病，对人类和动物均有影响；传染性蛋白质疾病特徵是在脑中累积异常glycoprotein同质体，Collinge医师和同事指出，该蛋白质被认为是这些疾病的传播物质。

At a certain range, habitat loss and its spatial structure can benefit the control of the epidemic disease, which indicates the possibility of using human disturbance in habitat as a potential epidemic-control method in conservation.(6) Not only the quantity of habitat loss but also the spatial correlations of patch types caused by nonrandom habitat loss affect the invasion and transmission of disease. More fragmented landscape (high amount of habitat loss, low clustering of lost patches) hinders the parasitic infection, which also indicates that whether the spatial heterogeneity benefits or hinders the invasion is dependent on the considered ecological process.(7) Two components of the spatial heterogeneity (the amount and spatial autocorrelation of the lost habitat) form a trade-off in determining the host-parasite dynamics.(8) Within a certain range of habitat loss, host can counterbalance the positive and negative effects, and shows a rising tendency.(9) The epidemic is more likely to break out in the prey-predator system if only a small amount of habitat loss.(10) A highly aggregated distribution of species is a common behavioral strategy when dealing with habitat loss or other environmental stresses.(11) The parasite-host/prey-predator eco-epidemiological systems have the similar mechanism with the intraguild predation systems, and the predator acts as the intraguild predation, the infected prey acts as intraguild prey, and the susceptible prey acts as shared resource.(12) Species at the highest trophic level are no longer affected the most by habitat loss, which depend not only on the biological mechanism but also on the external environmental disturbances.

随着邻体数目的增加，病毒的感染力度变得更大而且在空间上形成聚集的波形；(5)生境破坏及其空间结构在一定范围内有利于疾病的控制，这暗示人为对生境的干扰可作为疾病控制的一个潜在方法；(6)生境破坏的数量以及不同类型生境的空间分布格局都显著地影响了寄生病毒的入侵和传播，生境破碎化程度越高(高丧失斑块的数量或低聚集程度)，将越有害于病毒的入侵和传播，这暗示了空间异质性是否有益于物种的入侵依赖于所考虑的生态过程；(7)由生境破坏引起的空间异质性的两个组分之间存在负偶联关系trade-off(8在适度的生境破坏范围内，宿主种群能够平衡生境破坏带来的正负两种效应并呈现增长趋势；(9)在捕食-食饵系统中，寄生感染病毒极有可能在生境破坏量较低时爆发；(10)物种在面临生境破坏或者其它环境压力时表现出更高的聚集分布策略；(11)寄生-宿主/食饵-捕食生态传染病系统与共位捕食食物网结构具有相似的生物机制，其中捕食者扮演共位捕食者的角色，已感染食饵作为共位食饵，易感染食饵扮作共同消耗的资源；(12)位于最高营养级水平的种群对生境破坏的响应不一定是最敏感的，这不仅依赖于内在的生物机制同时也依赖于外在的环境干扰。

The researchers caution that they haven't shown conclusively that flies are in fact spreading the diseases. But more than 30,000 flies might enter a poultry house over six weeks. And flies are known to be vectors of viral and bacterial diseases such as cholera. Another study to add to the growing pile of research suggesting our cheap meat is not as cheap as it seems.

科研人员提醒：尽管这些样本还没最终认定此类疾病就是通过苍蝇传播的，但是一个养殖场在六个星期内就会有3万只苍蝇光顾，而众所周知，一些诸如霍乱的病毒和细菌类疾病就是靠苍蝇传播的。

Diseases resulting from sexually transmitted infections and infestations are now generally known as sexually transmitted diseases.

经由性传播的传染病和虫害侵扰性疾病现在通常被称为性传播疾病。

The decision as to which infections and infestations should be included among the STD's is therefore somewhat arbitrary.

至于性传播传染病与虫害侵扰性疾病都应该包括在性传播疾病内的决断因而是略微武断的。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。