Viral respiratory disease of the horse.     

D G Powell 《Veterinary Clinics of North America: Equine Practice》1991,7(1):27-52

The diagnosis of any viral respiratory disease relies on laboratory procedures to isolate the virus and demonstrate a significant rise in serum antibody titers. To isolate viruses from the upper respiratory tract, it is imperative that nasopharyngeal swabs are obtained from animals in the early acute stage of illness, i.e., during the pyrexic phase when the virus is replicating. Nasopharyngeal swabs must be placed in a virus transport medium and forwarded immediately to the laboratory at refrigerated temperature. Equine influenza, rhinopneumonitis, and equine viral arteritis are the three viral infections causing outbreaks of respiratory disease in North America. African horse sickness, although foreign to North America, could be introduced despite stringent horse importation regulations. Specific antiviral therapy is not available to treat viral respiratory disease in the horse. A variety of inactivated and modified live vaccines, however, are available to prevent clinical disease and the spread of infection caused by the common viral respiratory pathogens. A considerable amount of research is underway to enhance the potency and duration of immunity of the present vaccines against influenza and rhinopneumonitis. This research is directed at defining and characterizing the importance of specific glycoprotein antigens on the surface of the virus, which trigger the various host immune responses, and determining whether they are stimulatory or suppressive.  相似文献   

A COMPARISON OF DIATRIZOATE* AND IOXAGLATE† FOR POSITIVE CONTRAST SHOULDER ARTHROGRAPHY IN DOGS     

Henri van Bree  Bernadette Van Russen  Kathelijne Peremans  Jan Peremans 《Veterinary radiology & ultrasound》1991,32(6):291-296

In six experimental dogs, arthrographic quality and synovial inflammatory response with shoulder arthrography comparing meglumine-sodium diatrizoate (Urovison) and the monoacidic dimer, meglumine-sodium ioxaglate (Hexabrix) was evaluated. In our study initial films were of equally high diagnostic quality for both contrast media, but delayed films significantly favored ioxaglate for diagnostic quality. The rise in white blood cells in synovial fluid samples collected 24 hours after the arthrographic procedure was significantly lower after the use of ioxaglate. Histologic examination performed 14 days after the intra-articular injection revealed no drug related lesions.  相似文献   

Cryptosporidiosis in lovebirds (Agapornis sp.)     

Belton DJ  Powell IB 《New Zealand veterinary journal》1987,35(1-2):15

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Estimation of Genetic Variation Among Verticillium Isolates using AFLP Analysis     

Jan Fahleson  Ulf Lagercrantz  Qiong Hu  Lisa Ann Steventon  Christina Dixelius 《European journal of plant pathology / European Foundation for Plant Pathology》2003,109(4):361-371

Amplified fragment length polymorphism (AFLP) analysis was used to study genetic variation among 76 isolates of Verticillium. A dendrogram based on the AFLP data revealed three main groups. One group consisted of 35 European isolates derived from Brassica napus together with five Californian isolates taken from B. oleracea. This group displayed a high degree of genetic similarity and included three isolates earlier classified as Verticillium longisporum, indicating that all isolates in this group probably should be regarded as members of V. longisporum. V. dahliae isolates constituted the second group while the third group contained four V. albo-atrum isolates. In addition to these three groups, a cluster of six V. nigrescens isolates was observed. However, the genetic distances between the isolates of V. nigrescens were much higher than those between members in the other groups and the bootstrap value for the V. nigrescens cluster was subsequently low. Four isolates classified as V. tricorpus were highly diverse and did not cluster together. Analysis of molecular variance revealed that the isolates of V. longisporum were separated into four subgroups, based on geographic origin. The study furthermore shows that AFLP is a suitable method for studying population structure in Verticillium.  相似文献   

微管、微丝特异性抑制剂处理对水稻抗病性的影响   总被引：3，自引：0，他引：3  

杨民和  郑重  Jan E.LEACH 《植物病理学报》2003,33(2):156-161

 微管特异性抑制剂oryzalin、微丝特异性抑制剂细胞松弛素A (cytochalasin A,CA)和细胞松弛素D (cytochalasin D,CD)的试验表明:oryzalin在5~50μmol/L、CA在0.5~1.0μg/mL、CD在1~20μg/mL的浓度范围内,对稻瘟病菌孢子的萌发和附着胞的形成基本上没有影响。采用以上几种细胞骨架特异性抑制剂处理水稻叶鞘都可以不同程度地抑制寄主细胞抗病菌扩展的能力。在抑制剂处理的水稻叶鞘细胞中,病菌扩展的速度加快。进一步的观察发现,抑制剂处理抑制水稻细胞抗病菌的扩展能力与水稻的抗病防卫反应如原生质颗粒化、多酚类物质的积累和HR发生的延迟是相关的。  相似文献   

Effect of ionization,bedding, and feeding on air quality in a horse stable          下载免费PDF全文

Esther Willemijn Siegers  Milou Anthonisse  Frank J. C. M. van Eerdenburg  Jan van den Broek  Inge M. Wouters  Cornélie Martine Westermann 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2018,32(3):1234-1240

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Serologic and fecal markers to predict response to induction therapy in dogs with idiopathic inflammatory bowel disease          下载免费PDF全文

Cristiane C. Otoni  Romy M. Heilmann  Mercedes García‐Sancho  Angel Sainz  Mark R. Ackermann  Jan S. Suchodolski  Jörg M. Steiner  Albert E. Jergens 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2018,32(3):999-1008

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Equine foetal gender determination in mid‐ to late gestational mares: A practical inquiry          下载免费PDF全文

Margot Van de Velde  Kim Roels  Cyrillus Ververs  Ilse Gerits  Jan Govaere 《Reproduction in domestic animals》2018,53(5):1027-1032

In recent years, the interest in equine foetal gender determination (FGD) during gestation increased remarkably. Ultrasonographic FGD can be performed in two different periods during gestation. The earliest examination can take place at a gestational age of 60–70 days, whereby the genital tubercle is used to differentiate between male and female foeti. The time window of the second approach is wider (120–210 days), and there are more characteristics to take into consideration. In this article, the feasibility and accuracy of ultrasonographic FGD in mid‐ to late gestation are evaluated. One hundred twenty‐one mares from different breeds with a pregnancy stage between 120 and 270 days were examined once, using B‐scale ultrasonography (Esaote MyLab™ClassC). None of the mares were sedated nor shaved, and the procedure was completed within 15 min. Diagnosis was firstly based on the gonads. The final judgement was made based on all visible foetal reproductive organs. In three cases with a pregnancy stage beyond 257 days, FGD was not possible. All of the examined mares in which a FGD could be performed gave birth to a healthy foal. In 98% of the examinations (116/118), the diagnosis was correctly made. In both cases of misdiagnosis, only one characteristic was seen during the procedure and wrongly interpreted. Beyond 210 days of pregnancy, the extremities can preclude a good visualization of the inguinal region. In conclusion, equine FGD in mid‐ to late gestation is an accessible and accurate technique, although a good ultrasound device is a prerequisite and experience and expertise is necessary.  相似文献   

Urticarial vasculitis in a French bulldog          下载免费PDF全文

Jan Declercq 《Veterinary dermatology》2015,26(1):72-73

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Associations of fish with various types of littoral habitats in reservoirs     

Marek Šmejkal  Marie Prchalová  Martin Čech  Mojmír Vašek  Milan Říha  Tomáš Jůza  Petr Blabolil  Jan Kubečka 《Ecology of Freshwater Fish》2014,23(3):405-413

Fish associations with different types of littoral habitats were studied in four canyon‐shaped reservoirs in the Czech Republic in years 2010 and 2011 by gillnets. Two to three habitats per reservoir–beaches (former meadows), stump fields (former forest) and rubble slopes–were defined and sampled along the longitudinal axis of reservoirs. Effects of reservoir, habitat and locality (position along longitudinal axis) on fish biomass, abundance and species structure were tested for juvenile and adult fish separately. Hierarchical analysis of variance revealed that habitats differed significantly in fish biomass and abundance. Redundancy analysis showed that analysed environmental variables had significant influence on fish community structure. Most variability in community structure was explained by reservoir and then by combination of habitat and slope steepness. Locality position had the smallest influence on community structure. For both adult and juvenile fish total abundance and biomass, the most inhabited habitat was beaches; rubble slopes were the least inhabited. Habitat associations differed among species. Among adults, bream Abramis brama, white bream Blicca bjoerkna and roach Rutilus rutilus were associated with beaches and stump fields, whereas perch Perca fluviatilis, ruffe Gymnocephalus cernuus, asp Aspius aspius and pike Esox lucius were associated with rubble slopes. Bream, white bream, bleak Alburnus alburnus, roach, ruffe and pikeperch Sander lucioperca were associated with beaches among juveniles, whereas the only juvenile associated with rubble slopes was perch. We showed that most common species are associated with distinct habitats and also that utilisation of various littoral habitats differs in general.  相似文献