Foot and mouth disease and bluetongue: differences and similarities     

Dekker A  Dercksen D  Snoep J  van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701

On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures.  相似文献   

Salvinia plants in trade: what species are we actually talking about?     

Johan L. C. H. van Valkenburg  Laurens F. Piet  Edu Boer 《EPPO Bulletin》2023,53(1):108-116

Incorrect labelling of plants in trade and misidentification are widespread. Likewise, in trade numerous names are being used for the ornamental aquatic plant known as ‘Kariba weed’, but rarely the correct scientific name Salvinia molesta Mitch. For inspection services of EPPO member countries, correct identification of S. molesta has become important since the species was added to the EPPO A2 List and the List of Union concern in accordance with EU regulation 1143/2014 based on an EPPO Pest Risk Analysis (PRA) for the species. Inspections and a targetted survey of Salvinia plants in trade in the Netherlands were performed and additional material was obtained from wild sources in South Africa, Hungary and the United States. Specimen identification was verified by comparison with the herbarium collection at Naturalis Biodiversity Center in Leiden and with the sequences available in NCBI GenBank database. This paper provides the tools to correctly identity the relevant Salvinia species.  相似文献   

Seasonal turnover and insights into the overwintering biology of wireworms (Coleoptera: Elateridae) in the Canadian Prairies     

Ivan Drahun  Elise A. Poole  Katherine A. Hunt  Willem G. van Herk  Christophe M. LeMoine  Bryan J. Cassone 《Pest management science》2023,79(2):526-536

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Accuracy of the modified vertebral heart score and the cardio-vertebral ratio for radiographic evaluation of cardiomegaly in ferrets     

Pierre-Olivier Godart  Yannick Ruel  Mileva Bertal  Shanti Esmieu  Vassiliki Gouni  Albert Agoulon  Hugues Gaillot 《Veterinary radiology & ultrasound》2023,64(2):173-182

Thoracic radiography is commonly used to assess the size of the heart and diagnose cardiac disease in ferrets. Several standardized radiographic heart size indicators have been introduced in this species and values in healthy ferrets have been reported. To date, none of these indicators has been tested in ferrets with cardiac disease. The aim of this prospective and retrospective, analytical observational design study was to assess the accuracy of the modified vertebral heart score (mVHS) and the cardio-vertebral ratio (CVR) in the radiographic detection of cardiomegaly in ferrets. Thoracic radiographs of 24 ferrets with confirmed heart diseases, 22 ferrets with non-cardiac diseases and normal-sized hearts on echocardiogram, and 24 healthy ferrets were mixed and examined by three independent and blinded radiologists who measured mVHS and CVR in right lateral (RL) and ventrodorsal (VD) radiographs. For all readers, ferrets with cardiac disease had significantly higher mVHS and CVR than ferrets without cardiac disease on echocardiography. Optimal cut-points for predicting cardiac enlargement were 6.25 vertebrae and 7.25 vertebrae for RL-mVHS and VD-mVHS, and 1.58 and 1.80 for RL-CVR and VD-CVR, respectively. Using these cut-points, the accuracy was good for indicators measured in RL radiographs (92.9% for RL-mVHS; 91.4% for RL-CVR) and moderate for indicators measured in VD radiographs (88.6% for VD-mVHS; 85.7% for VD-CVR). Findings supported the use of mVHS and CVR for evaluating the size of the heart in diseased ferrets, with caution in values interpretation when pericardial fat prevents precise delineation of the cardiac silhouette contour especially on VD radiographs.  相似文献   

Reference intervals for plasma,urinary, and salivary concentrations of free metanephrines in dogs: Relevance to the diagnosis of pheochromocytoma     

Marit F. van den Berg  Hans S. Kooistra  Guy C. M. Grinwis  Sebastiaan A. van Nimwegen  Martijn van Faassen  Ido P. Kema  Erik Teske  Sara Galac 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2023,37(1):173-183

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Clinical utility of an immunoglobulin A-based serological panel for the diagnosis of chronic enteropathy in dogs     

Daniel K. Langlois  Jessica C. Pritchard  M. Katherine Tolbert  Albert E. Jergens  Gary Block  Andrew S. Hanzlicek  Jared A. Jaffey  Jörg M. Steiner  Sina Marsilio  Sara A. Jablonski 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2023,37(2):446-454

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Effect of sirolimus on insulin dynamics in horses     

Demia J. de Tonnerre  Carlos E. Medina Torres  Darko Stefanovski  Mary A. Robinson  Kate L. Kemp  François-René Bertin  Andrew W. van Eps 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2023,37(2):703-712

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Dimensional analysis in surface irrigation   总被引：1，自引：0，他引：1  

Theodor S. Strelkoff  Albert J. Clemmens 《Irrigation Science》1994,15(2-3):57-82

The surface-irrigation design process requires multiple analyses of surface irrigations to test tentative values of design parameters in the search for an optimum. Preparation of general design charts can aid the design process if the users' test cases fall within the scope of the charts. The large number of independent variables in surface irrigation preclude the generation of charts covering the practical range of all independent variables, when these are in dimensioned form. Dimensionless formulations allow significant reductions in the amount of data generated and presented, without loss of generality. Relationships pertinent to surface-irrigation analyses and design are reviewed in dimensionless terms. Dimensionless forms are developed primarily from an examination of the equations governing surface-irrigation phenomena. Additionally, dimensionless forms are derived from a study of the dimensions of the pertinent variables, without recourse to the governing equations. The Buckingham Pi Theorem is derived in the context of surface irrigation. Different choices for reference variables, leading to different meanings for the resulting dimensionless parameters, have advantages and disadvantages for analysis and design of surface irrigation systems. The different systems developed in the past for border irrigation are reviewed and their consequences noted; new systems with potential for future studies are suggested. Particular attention is devoted to those dimensionless representations useful in design.  相似文献   

Water requirement of Aloe vera in a dry caribbean climate     

Willem B. M. Genet  Cok A. M. van Schooten 《Irrigation Science》1992,13(2):81-85

Summary As hardly any data can be found on the water requirement and yield response to water of Aloe vera, an irrigation experiment on transplanted aloe poles was conducted on the Caribbean island of Aruba. Compared to non-irrigated treatments irrigation shows a positive influence on growth, number of developed leaves, raw gel figure and gel production per plant. The amount of irrigation water to apply can be best calculated based on crop coefficients (K_c) between 0.20 and 0.30. Treatment based on a K_c value higher than 0.30 did not further increase production. A lysimeter study conducted over a relatively short period revealed that the crop coefficient for Aloe vera varied between 0.25 and 0.40 which is characteristic of the so-called agave/pineapple group.  相似文献   

Analysis of the uncertainty associated with the estimation of nitrogen losses from farming systems     

Sylvain Payraudeau  Hayo M.G. van der Werf  Françoise Vertès 《Agricultural Systems》2007

This work describes the analysis of the uncertainty linked to the annual direct and indirect losses of different nitrogenous compounds at the scale of a group of farms. The nitrogen (N) forms taken into account are: ammonia (NH₃), nitric oxide (NO), nitrous oxide (N₂O), dinitrogen (N₂) and nitrate (NO₃). The gaseous N emissions for the different components of the farms are estimated with a selection of adapted emission factors. The NO₃ losses at the farm scale are calculated as the difference between the surplus of the farm-gate N balance and the gaseous N emissions.  相似文献