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1.
对秋季中华蜜蜂工蜂有分泌活性舌腺（９日龄）和无分泌活性的舌腺（采集蜂）的超微结构进行了观察和比较，发现二者的舌腺细胞的超微结构存在着差异。９日龄工蜂舌腺处在分泌活性状态。细胞核发达，多突起；粗面内质网发达，成平行状排列；胞内管、胞外管中都充满电子致密度均匀的物质，即王浆物质；有大量的分泌块；线粒体内嵴排列紧密，呈板层状。而采集蜂舌腺处在无分泌活性状态。核周边异染色质增多；粗面内质网不太发达，多呈泡状；胞内管中物质为一些不均匀的电子致密度大的粗颗粒物质；胞外管中只有少量水样物质；线粒体内嵴间隙相对变大，多发现内嵴间隙呈管泡状。 相似文献
2.
James K Klaassen 《Veterinary Clinics of North America: Small Animal Practice》2002,32(6):1237-66, v-vi
This article deals with the cytologic appearance of various glandular tissues located in the subcutaneous tissues. Normal cytologic features are described. In addition, inflammatory, infectious, neoplastic, and hyperplastic changes are discussed. Most of these features are depicted in the 60+ photomicrographs that are distributed throughout the article. Many of the changes are similar in the glands, and it is usually possible to differentiate the gland of origin based on cytologic appearances. Subcutaneous neoplasms that are not associated with a subcutaneous gland, and lymph node cytology are not covered in this article but are addressed elsewhere. 相似文献
3.
Moritz J 《DTW. Deutsche tier?rztliche Wochenschrift》2000,107(3):109-112
When pets are sold on pet markets there are frequently situations that are not consistent with the laws concerned with animal welfare. Animals are not packed properly, tropical animals needing certain temperatures are sold outdoors under unsuitable weather conditions, animals are kept and transported in unsuitable containers, shy animals not used to market conditions or sick animals are being offered. Different possibilities to guarantee proper conditions for the animals are being described involving the organizer as well as the local veterinary authority surveying the market. Possible executive measures are presented. 相似文献
4.
热激蛋白在动物应激中的应用 总被引：4，自引：0，他引：4
热应激蛋白(HSPs)存在于所有动物细胞中，是动物受到应激原刺激后诱导产生的一组应激蛋白，与机体的应激关系密切，在进化上高度保守。本文在对HSP发现、分类及功能简要介绍的基础上，对HSP70在动物应激中的作用及其调控机制进行了详细的综述，指出HSP将对阐明动物应激机理有重要的意义。 相似文献
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Surgical site infections caused by bacteria that are resistant to multiple classes of antimicrobials are an important and increasing problem in veterinary medicine. Organisms such as methicillin-resistant staphylococci, extended spectrum beta-lactamase Enterobacteriaceae and multi-drug resistant Enterococcus, Acinetobacter and Pseudomonas spp. are among the current concerns; however, the emergence and dissemination of other multi-drug resistant organisms will likely follow. Despite the negative connotations that are associated with multi-drug resistant infections, most infections are potentially treatable if basic principles of infection treatment and infection control are followed. 相似文献
7.
A. L. Nagy C. Cortinovis L. J. Spicer M. C. Perego F. Caloni 《Equine Veterinary Education》2019,31(9):496-500
Poisoning is a frequent problem in domestic animals. Horses are the third most commonly affected species and pesticides are one of the main causes of toxicosis. Here within are reviewed the most frequent toxicoses where it emerges that the main causes are misuse and accidental exposure. Rodenticides, acetylcholinesterase insecticides followed by herbicides are the main cause of toxicosis and effects of emerging chemicals are being reported. Metaldehyde is still a problem, together with methiocarb. No information has been reported on poisoning with pesticide mixtures. 相似文献
8.
A progressive axonopathy of Boxer dogs affecting the central and peripheral nervous systems 总被引：1，自引：0，他引：1
Five Boxer dogs with a new neurological disease are described. There is a progressive ataxia and weakness, initially in the hind-legs but later involving forelegs. The onset of signs is usually around 6 months of age although an older dog was affected. Proprioceptive function, muscle tone and tendon reflexes are diminished or absent while pedal reflexes and pain sensation are preserved. Muscle atrophy is minimal. The peripheral nerves are depleted in myelinated fibres. Nerve roots and, to a lesser extent, peripheral nerves show demyelination/remyelination changes and in the cervical ventral roots in particular, regenerative clusters are present. Forelimb muscles show evidence of re-innervation. In the CNS numerous swollen axons are present. The dorsolateral and ventral columns of the spinal cord are affected throughout their length. In the brain a number of nuclei and tracts, particularly in the lower brain stem, are affected and the superior olives are severely involved. The cerebral cortex and subcortical white matter appear normal. Various portions of the auditory and optic pathways are affected pathologically as are a number of cranial nerves. The axonal swellings contain a number of organelles including smooth endoplasmic reticulum, disordered neurofilaments, vesicles and mitochondria. The disease may be specific to Boxer dogs and may be inherited. 相似文献
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李朋 《四川畜牧兽医学院学报》2008,(6):146-150
笔者认为苔丝、爱玛、安娜“自杀”主要有三个方面的原因：首先，对爱情的绝望是她们自杀的最直接原因；其次，她们自身带着沉重的罪恶感。一方面想从现实环境中逃脱出来，一方面又无法摆脱既定的社会法则；最后，她们都生活在转型时期比较混乱的社会环境中，各种社会因素交织成一张巨网，使她们围困其中而无法动弹。 相似文献
11.
本文首次深入研究了中国柴胡属29种,5变种及2变形果实的三维结构。结构显示果实结构变化较大,分果表面平滑,横切面近圆形,脊略微突出。中果皮有两种分泌结构,伴生油管及非伴生油管（油管）。前者仅存在于少数物种,且直径小,后者包括不分支及分支油管。不分支油管存在于多数物种的沟（1～5）和结合面（2～7）,油管通常与分果近等长,但亦存在短油管。少数物种的油管呈分支状,在中果皮不规则分布。种皮由1或2层薄壁细胞构成。胚乳在结合面平直或微凹。中果皮无结晶。心皮柄多为2个,在结合面彼此相对。柴胡属果实的多数特征存在于芹亚科其他类群,但分支状油管及2层细胞的种皮仅见于牵环花亚科,变豆菜亚科及芹亚科的基础类群。柴胡属果实的解剖结构支持分子系统学将柴胡属位于芹亚科其他类群的基础位置。 相似文献
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J C Fox H E Jordan K M Kocan T J George S T Mullins C E Barnett B L Glenn R L Cowell 《Veterinary parasitology》1986,20(1-3):13-29
Current methods and commercial test systems for the diagnosis of parasitic infections in both animals and humans are reviewed. Lists of test kits and their manufacturers are provided along with ordering information: the only commercially available test kits are for the diagnosis of toxoplasmosis in humans or animals and dirofilariasis (heartworm) in dogs. A partial list of diagnostic laboratories and the parasite tests they perform is also provided. Complete lists of diagnostic tests that could be obtained in the private sector are not available but would be useful. Two microfluorometric solid-phase assay systems are reviewed, and adaptations to custom assays for several kinds of parasites are briefly described. User problems in performing tests and interpreting results are stressed with emphasis placed on diagnosis of dirofilariasis in dogs. False-positive serology in dogs without heartworms and negative antibody responses in micro-filariae-positive animals are discussed with respect to proper interpretation of results. 相似文献
13.
宁夏柠条资源利用现状及其饲料开发潜力调查--以盐池县为例 总被引：2，自引：0，他引：2
对以宁夏盐池县为代表的柠条资源分布、利用状况、存在问题等相关内容进行了全面调查与分析。结果表明:截至2003年,全区柠条资源存林面积已达43.672 4万hm2,占全区总土地面积的8.431%。其中天然林为2.590 5万hm2,人工存林面积累计已达41.081 9万hm2,是全区柠条总面积的94.068%,具有面积大、分布广、幼林化、生物贮量多等特点。主要存在有开发与利用程度低下、资源老化程度严重和过度放牧等问题,并结合当地实际,提出了柠条资源的开发与利用相关对策。 相似文献
14.
A M Klide 《Veterinary Clinics of North America: Small Animal Practice》1992,22(2):389-391
The vaporizers that are positioned outside of the circle have known constant output concentrations and are not affected by positive pressure ventilation. The vaporizers that are positioned inside the circle system have unknown, variable output concentrations and are markedly affected by positive pressure ventilation. Either type can be safely used if its operating characteristics are understood. 相似文献
15.
Ziegler R 《DTW. Deutsche tier?rztliche Wochenschrift》2001,108(3):125-131
Rabbits are wide spread farm animals and pets, which are kept in the most diverse areas. The evaluation of rabbit husbandries in regard to animal welfare legislation is often complicated by different and contradictory recommendations of various organisations, which should partly be revised. In the following article some regulations and guidelines are discussed. In addition, some aspects for the keeping of rabbits in accordance with their behavioural needs are outlined, some frequent shortcomings regarding the keeping of rabbits are described and possibilities for taking official measures are presented. 相似文献
16.
The roles free-living amebae and the parasitic protozoa Entamoeba histolytica and Balantidium coli play as agents of waterborne zoonotic diseases are examined. The free-living soil and water amebae Naegleria fowleri, Acanthamoeba spp., and Balamuthia mandrillaris are recognized etiologic agents of mostly fatal amebic encephalitides in humans and other animals, with immunocompromised and immunocompetent hosts among the victims. Acanthamoeba spp. are also agents of amebic keratitis. Infection is through the respiratory tract, breaks in the skin, or by uptake of water into the nostrils, with spread to the central nervous system. E. histolytica and B. coli are parasitic protozoa that cause amebic dysentery and balantidiasis, respectively. Both intestinal infections are spread via a fecal-oral route, with cysts as the infective stage. Although the amebic encephalitides can be acquired by contact with water, they are not, strictly speaking, waterborne diseases and are not transmitted to humans from animals. Non-human primates and swine are reservoirs for E. histolytica and B. coli, and the diseases they cause are acquired from cysts, usually in sewage-contaminated water. Amebic dysentery and balantidiasis are examples of zoonotic waterborne infections, though human-to-human transmission can occur. The epidemiology of the diseases is examined, as are diagnostic procedures, anti-microbial interventions, and the influence of globalization, climate change, and technological advances on their spread. 相似文献
17.
Kim DY Mauldin GE Hosgood G Cho DY 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2005,19(4):610-612
Melanocytic tumors are relatively common in dogs and most often occur in the oral cavity, lip, skin, digit, and eye. There are notable differences in the behavior of these tumors, depending on their anatomical location. The majority of oral melanomas and two-thirds of melanomas arising from the digit are malignant, whereas most of melanomas originating from the haired skin are benign. The anus and perianal areas are very uncommon sites for melanocytic tumors in domestic animals except horses, and most of those tumors in horses are malignant. To our knowledge, perianal malignant melanoma has not been reported in the dog and its prognosis is unknown. 相似文献
18.
对中国喀喇昆仑山地区禾本科野生植物资源进行调查研究,结果表明该地区禾本科植物有18属,79种,4亚种,2变种;其中54%~59%为植物群落中的建群种或优势种;97.7%的种类为优良牧草,是该地区野生动物和家畜生存的重要食物来源;作物近缘种有赖草属(Leymus)和披碱草属(Elymus)植物约22种;防风固沙植物资源有芨芨草属(Achnatherum)、拂子茅属(Calamagrostis)、赖草属等约14种;水土保持植物资源有早熟禾属(Poa)、碱茅属(Puccinellia)等约26种;高海拔地区和北方冷季型草坪草资源有早熟禾属、羊茅属(Festuca)、(艹洽)草属(Koeleria)等约9种。 相似文献
19.
This paper attempts to relate the practicalities of vaccine development to the ideals which should be aimed for in a new vaccine. The type of immune response induced is dependent upon the nature of the antigen in the vaccine and the site and timing of its presentation to the immune system. In this respect the influence of age, maternal immunity and antigenic competition are discussed. The possible side effects associated with vaccination are defined and vaccines which are currently available for horses are reviewed. These vaccines are mostly for the prevention of respiratory disease. Finally, the possible uses for antisera are considered. 相似文献
20.
Implications of mycotoxins in animal disease 总被引：7，自引：0，他引：7
A C Pier J L Richard S J Cysewski 《Journal of the American Veterinary Medical Association》1980,176(8):719-724
Mycotoxins are formed on animal feeds when conditions of moisture and temperature permit the growth of naturally occurring toxigenic fungi. In general, mycotoxins are low molecular weight, nonantigenic substances, many of which are relatively heat stable. Mycotoxins can cause acute disease episodes when animals consume critical quantities of them. Specific toxins affect specific organs or tissues such as the liver, kidney, oral and gastric mucosa, brain, or reproductive tract. In acute mycotoxicoses, the signs of disease often are marked and directly referable to the affected target organs. Most frequently, however, concentrations of mycotoxin in feeds are below those that cause acute disease. At lower concentrations, the effects of mycotoxins are more protean. They reduce the growth rate of young animals, and some interfere with native mechanisms of resistance and impair immunologic responsiveness, making the animals more susceptible to infection. These effects on immunity and resistance are difficult to recognize because the signs of disease are associated with the infection rather than with the mycotoxin that predisposed the animal to infection. Animals vary in their susceptibility to some mycotoxins, according to the species and age of animal; young growing animals are more susceptible to certain mycotoxins than are adults. The major effects, sources, and dose response relationships of mycotoxins important to the health of food-producing animals are presented in accompanying tables. 相似文献