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Kedmi M Galon N Herziger Y Yadin H Bombarov V Batten C Shpigel NY Klement E 《Veterinary journal (London, England : 1997)》2011,190(1):77-83
An outbreak of epizootic haemorrhagic disease virus (EHDV) in cattle in Israel in 2006 enabled a comparison of the spatial distribution of epidemic exposure to EHDV with that of exposure to bluetongue virus (BTV), which is endemic in the country. The seroprevalence of both viruses was examined in 1650 serum samples collected from 139 farms representative of the spatial distribution of dairy cattle in Israel. A significant association between exposure to EHDV and BTV was demonstrated in both univariate and multivariate analyses. Recent exposure to BTV and EHDV (demonstrated by seroprevalence in calves) was clustered in different geographical locations, indicating that the two viruses had different patterns of spread, that of EHDV being influenced by winds and terrain barriers and that of BTV by herd immunity. 相似文献
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Schroeder CA Snyder LB Tearney CC Baker-Herman TL Schroeder KM 《Veterinary anaesthesia and analgesia》2011,38(3):267-271
Objective To describe the ultrasound‐guided technique to the transversus abdominis plane (TAP) block in the dog and evaluate the spread of a local anesthetic/methylene blue solution. Study design Prospective experimental trial. Animals Ten adult Beagle cadavers weighing 11.1 ± 1.1 kg (mean ± SD). Methods Transversus abdominis plane (TAP) blocks were performed bilaterally by a single trained individual on unpreserved cadaver dogs using 10 mL of methylene blue/bupivacaine solution per site. Dissection of the abdominal wall was performed within 15–55 minutes of block to determine distribution of injectate and nerve involvement in the transversus abdominis fascial plane. Results The transversus abdominis fascial plane was adequately visualized via ultrasound and injected in twenty hemi‐abdominal walls. Segmental branches of T11, T12, T13, L1, L2, and L3 were adequately stained in 20%, 60%, 100%, 100%, 90%, and 30% of injections, respectively. Conclusions and clinical relevance This anatomical study suggests that the transversus abdominis plane (TAP) block would provide adequate regional anesthesia of the abdomen, potentially extending to the cranial and caudal limits of the abdomen. This supports the clinical potential of this block in veterinary medicine. 相似文献
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George H. Axinn Shelley Feldman Pat Barnes-McConnell Michele Lipner Jere L. Gilles J. Kathy Parker William M. Alexander Judith Krieger J. P. Brien James P. Stansbury Kathleen Staudt Marcy Rosenbaum Norman Uphoff Alan Long Jere L. Gilles Constance M. McCorkle David Brokensha Kimberley Lucas Carrie R. Johnston Robert Lawless 《Agriculture and Human Values》1988,5(1-2):124-168
106.
Effects of wind-driven rainfall on stemflow generation between codominant tree species with differing crown characteristics 总被引:1,自引:0,他引:1
John T. Van Stan II Courtney M. SiegertDelphis F. Levia Jr. Carrie E. Scheick 《Agricultural and Forest Meteorology》2011,151(9):1277-1286
Meteorological influences on the variability of stemflow generation can affect the hydrology, ecology and soil chemistry of wooded ecosystems, yet the effects of directional wind-driven rainfall on differential stemflow production remain relatively un-researched. This study examines the correspondence of directional wind-driven inclined rainfall with stemflow generation in individual tree crowns utilizing multiple correspondence analysis (MCA) and intrastorm observations at 5 min monitoring intervals. In general, preferential stemflow generation at Fair Hill was observed during episodes of inclined rainfall driven by wind from the east to north-northeast (33.76-101.25°). This was supported by MCAs which produced significant correspondences between stemflow production and periods of inclined wind-driven rainfall for nearly all monitored storm events. Intrastorm plots of stemflow production from dominant and subcanopy trees of each codominant species (Fagus grandifolia Ehrh. (American beech) and Liriodendron tulipifera L. (yellow poplar)) also verified this correspondence. Interspecific canopy characteristics of L. tulipifera and F. grandifolia affected crown position, canopy structural characteristics, and, thus, the canopy's response to inclined precipitation. The greater vertical canopy depth observed for F. grandifolia trees enabled them to more efficiently capture inclined rainfall for enhanced stemflow production; whereas, the greater horizontal surface area of L. tulipifera canopies enhanced their droplet capture efficiency and subsequent stemflow generation for periods of un-inclined rainfall. As inclined wind-driven rainfall occurred within a majority of rain events at this site, preferential stemflow production may be a significant process to consider when examining the spatial distribution of canopy-derived water fluxes to the forest floor of wooded catchments under similar meteorological conditions. 相似文献
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This study collated information relating to acidification of running and standing waters on Sites of Special Scientific Interest (SSSIs) throughout Britain in acid-sensitive areas. Of those SSSIs which occur in acid-sensitive areas of Britain, 196 have water bodies. The following information was obtained for each site if available: details of local geology and soils, types of land use and management, water quality data and data relating to biological components of both the aquatic and riparian habitats. In addition, samples from 112 water bodies were collected for water chemistry and epilithic diatom analysis. Results from each site were placed into existing critical loads and species response models to determine whether acidification had occurred. Results showed that the fresh waters on 141 SSSIs had probably suffered acidification. This was most acute in north Wales, with mid Wales, south-west and north-east Scotland and northern England also being badly affected. A wide variety of changes in the biological status of water bodies relating to acidification were found to have been recorded on SSSIs, ranging from phytoplankton, invertebrate and macrophyte community changes to decline of fish, amphibian, bird and mammal populations. Catchment afforestation may be a problem in poorly buffered areas and has probably contributed to freshwater acidification on 40 SSSIs. Comparison with critical loads maps for acidity in UK fresh waters reveals that existing commitments on acidifying emissions (the EC Large Combustion Plant Directive) will not be sufficient to prevent further acidification on a number of SSSIs. In order to achieve a protection of the nature conservation interest of fresh waters further commitments to emission reductions will be necessary. 相似文献
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