首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   18篇
  免费   2篇
  国内免费   1篇
基础医学   2篇
临床医学   3篇
内科学   2篇
特种医学   1篇
综合类   2篇
预防医学   11篇
  2020年   5篇
  2015年   2篇
  2014年   2篇
  2013年   1篇
  2012年   1篇
  2008年   2篇
  2006年   1篇
  2005年   1篇
  2004年   1篇
  2000年   1篇
  1997年   1篇
  1995年   1篇
  1989年   1篇
  1979年   1篇
排序方式: 共有21条查询结果,搜索用时 15 毫秒
1.
《Ticks and Tick》2020,11(6):101494
The phylogeny of the hard tick genus Amblyomma Koch, 1844 deserves special attention, because several poorly studied tick species associated with reptiles still bear the name of this genus, although they may not belong to it. This study focuses on the phylogeny of two such species with uncertain taxonomic status, i.e., Amblyomma transversale (Lucas, 1845) and Amblyomma exornatum Koch, 1844, analyzing two mitochondrial (cytochrome c oxidase subunit 1 and 16S rRNA) and two nuclear (18S and 28S rRNA) genes.In the cox1 phylogenetic analysis, both Am. transversale and Am. exornatum were part of a sister group to all other Metastriata, whereas in the 16S rRNA gene analysis, Am. transversale belonged to a sister group to three subfamilies (Amblyomminae Neumann, 1911; Haemaphysalinae Hoogstraal and Aeschlimann, 1982; Bothriocrotoninae Klompen, Dobson and Baker, 2002), and Am. exornatum formed a sister group to other Amblyomminae. However, based on the 18S and 28S rRNA genes, Am. transversale belonged to a sister group of either Bothriocrotoninae alone or of both Bothriocrotoninae and Haemaphysalinae, respectively. In the latter two phylogenetic analyses Am. exornatum always clustered within Amblyomminae. Morphological comparisons revealed that Am. transversale has at least four unique characters and shares a high number of traits with the genera Robertsicus Barker and Burger, 2018 and Archaeocroton Barker and Burger, 2018, as well as with the subgenus Alloceraea Schulze, 1918 (represented by Haemaphysalis inermis Birula, 1895). These results justify that the genus Africaniella Travassos Dias, 1974 should be reinstated, and the species name of Am. transversale should be used as Africaniella transversale (Lucas, 1845).  相似文献   
2.
医学节肢动物中蜱作为主要的媒介生物不仅叮咬人和动物,吸食其血液,也是许多严重传染病的传播媒介。内蒙古有关蜱类的系统研究开始于20世纪60年代,以姚文炳等为代表发表了一系列关于内蒙古蜱类的研究论文,这些文献资料散布在各种期刊和书籍中,内蒙古自治区地方病防治研究中心在研究与蜱类有关的疾病中也收集了内蒙古东部、中部和西部的蜱类标本1000余份,通过检索文献资料和检视标本发现内蒙古蜱类共有2科7属27种,本文记述了内蒙古部分蜱类标本的鉴定结果,并列出了内蒙古蜱类的分布和宿主。另外,对内蒙古蜱传疾病的研究做了回顾。  相似文献   
3.
Ticks are distributed worldwide and impact human and animal health, as well as food animal production. Control of ticks has been primarily by application of acaricides, which has resulted in selection of resistant ticks and environmental pollution. Vaccines have been shown to be a feasible tick control method that offers a cost-effective, environmentally friendly alternative to chemical control. However, identification of tick-protective antigens remains the limiting step in vaccine development. Tick antigens exposed naturally to the host during tick feeding and those concealed have both shown promise as candidate vaccine antigens. Development of vaccines against multiple tick species may be possible using highly conserved tick-protective antigens or by antigens showing immune cross-reaction to different tick species. Vaccines made from a combination of key protective antigens may greatly enhance vaccine efficacy. Preliminary studies have suggested the possibility of vaccine strategies directed toward both tick control and the blocking of pathogen transmission. Characterization of the tick genomes will have a great impact on the discovery of new protective antigens. The future of research directed toward tick vaccine development is exciting because of new and emerging technologies for gene discovery, and vaccine formulation and delivery.  相似文献   
4.
山东省沂蒙山区莱姆病自然疫源地调查   总被引:1,自引:0,他引:1  
目的 :调查山东省沂蒙山区莱姆病自然疫源地。方法 :1992~ 1999年设点 ,用间接免疫荧光抗体试验进行人群莱姆病感染调查 ;用直接免疫荧光抗体法进行蜱中肠带螺旋体率调查 ;取鼠的肾脏、膀胱分离病原。结果 :沂蒙山区人群莱姆病平均感染率为 7.50 % ,林区人群感染率明显高于非林区人群 ;该地区蜱类以长角血蜱为优势种 ,该蜱中肠携带莱姆病螺旋体率为 12 .0 % ,从86组长角血蜱培养物中获得 2株莱姆病螺旋体。结论 :从病原学上证实沂蒙山区为莱姆病自然疫源地  相似文献   
5.
6.
本文为蜱总科内三个科(硬蜱科、软蜱科和纳蜱科)的比较研究,鉴于消化和生殖系统在传病中的重要作用,作者选择这两个系统为主要研究对象。从三个科的解剖特点来看,其消化系统基本相似,只有一些细微的差别。例如,软蜱科的中肠体积较大而长度较小、侧枝数量变化大。生殖系统,硬蜱科与软蜱科区别明显,软蜱雌虫以扩大的子宫作为受精囊,而硬蜱却以阴道颈部代替;此外,软蜱科的雄虫有贮精囊,而硬蜱科则缺,这说明前者比后者更进化、更高等。纳蜱科除兼具上述两科的特点外,又具独有的特征,故其是一个中间类型的科。  相似文献   
7.
Ixodid and argasid tick species and west nile virus   总被引:3,自引:0,他引:3  
Control of West Nile virus (WNV) can only be effective if the vectors and reservoirs of the virus are identified and controlled. Although mosquitoes are the primary vectors, WNV has repeatedly been isolated from ticks. Therefore, tick-borne transmission studies were performed with an ixodid (Ixodes ricinus) and an argasid tick species (Ornithodoros moubata). Both species became infected after feeding upon viremic hosts, but I. ricinus ticks were unable to maintain the virus. In contrast, O. moubata ticks were infected for at least 132 days, and the infection was maintained through molting and a second bloodmeal. Infected O. moubata ticks transmitted the virus to rodent hosts, albeit at a low level. Moreover, the virus was nonsystemically transmitted between infected and uninfected O. moubata ticks co-fed upon uninfected hosts. Although ticks are unlikely to play a major role in WNV transmission, our findings suggest that some species have the potential to act as reservoirs for the virus.  相似文献   
8.
广西书籍硬蜱有6属11种,其中缅甸血蜱、厚体盲花蜱、嗜鸟血蜱和短小扇头蜱为省内硬蜱的新记录,我们采集并鉴定169头成蜱,微小牛蜱占50.3%,可能为广西的硬蜱翁势种。调查龙胜林区34人,资源林区112个,有明显蜱咬史的分别为28人和93人,叮咬率达82.4%和83.0%,且男性高于女性。林工工龄越长,有蜱咬史率越高,人 体被蜱叮咬部位多为两下肢。  相似文献   
9.
《Ticks and Tick》2020,11(5):101471
Basic knowledge of species, ecological preferences and behavior of ticks in preserved rainforests are scanty. We herein describe species richness, seasonal activity, altitude influence and questing height of ticks along 3375 m of animal trails within the largest remain of inland Atlantic rainforest in Brazil, the Iguaçu National Park (INP). Altogether, 2954 ticks from nine tick species were collected; Amblyomma brasiliense Aragão (49.09% of the specimens), Amblyomma coelebs Neumann (29.08%), Amblyomma incisum Neumann (12.49%), Haemaphysalis juxtakochi Cooley (5.21%), Amblyomma ovale Koch (2.64%), Amblyomma longirostre Koch (0.20%), Ixodes fuscipes Fonseca (0.17%), Ixodes loricatus Neumann (0.07%) and Amblyomma dubitatum Neumann (0.03%) (Ixodida: Ixodidae). There was an evident seasonal influence on tick host-questing activity, with each tick stage prevailing in a season before the following one, and a general trend of one tick generation per year. Adult tick questing height mode on vegetation showed a correspondence between tick species and preferred host size and height. Adult ticks quested higher than immatures, but several larval clusters were found high enough to seek for large-sized hosts as well. Nymphal and adult tick questing height increased significantly at higher altitudes within the park. Amblyomma incisum and A. coelebs were more abundant at higher and lower altitudes, respectively. The knowledge on tick species richness, ecological preferences and behavior herein obtained provides baseline information to understand tick-borne disease epidemiology occurring at landscapes under a strong anthropogenic impact.  相似文献   
10.
This work emphasizes the detection of Candidatus “Rickettsia amblyommii” in questing Haemaphysalis juxtakochi and Amblyomma mixtum. From February 2009 to December 2012, questing ticks were collected from the vegetation and leaf-litter of four protected forests and two grassy areas around the Panama Canal basin. DNA was extracted from Amblyomma mixtum, Amblyomma naponense, Amblyomma oblongoguttatum, Amblyomma pecarium, Amblyomma tapirellum, Haemaphysalis juxtakochi, and unidentified immature Amblyomma. Specific primers of citrate synthase gene gltA were used to detect and identify the rickettsiae. Amplicons with the expected band size were purified and sequenced. DNA of C. “R. amblyommii” was found in A. mixtum, H. juxtakochi and Amblyomma immatures. To our knowledge, these finding represent the first report of C. “R. amblyommii” in free-living ticks in the wilderness of Central America.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号