Ascites and portal hypertension in three young dogs with non-fibrosing liver disease     

G. B. Hunt  R. Malik  B. L. Chapman  W. A. Lamb  G. S. Allan 《The Journal of small animal practice》1993,34(9):428-433

Three young dogs were evaluated because of the sudden development of ascites. In each case ascites was referable to non-fibrosing hepatic disease associated with portal hypertension. Obstruction to portal flow was pre-sinusoidal in two cases and post sinusoidal in the other. In all cases ascites developed in the absence of severe hypoalbuminaemia. The ratio of the protein content of ascitic fluid in relation to the protein content of plasma proved useful in differentiating between pre- and post sinusoidal portal hypertension. All three animals died or were euthanased because of the sequelae of portal hypertension.  相似文献   

Reduction of deer browsing of Douglas-fir (Pseudotsuga menziesii) seedlings by quadrivalent selenium     

G.G. Allan  D.I. Gustafson  R.A. Mikels  J.M. Miller  S. Neogi 《Forest Ecology and Management》1984,7(3):163-181

The feasibility of using selenite ion as a systemic deer repellent for the protection of Douglas-fir (Pseudotsuga menziesii) seedlings is evaluated. When applied to the soil, the selenite ion is absorbed by the seedling roots, transported to the foliage, and thereafter volatilized. Acute phytotoxicity is observed only when selenium foliar concentrations exceed 100 ppm, while animal repellency is demonstrated at concentrations as low as 1–2 ppm. The design of a slow release device, based on a sparingly soluble salt of selenious acid, is reported, and its evaluation in a series of field trials is described. Preliminary results indicate that statistically significant reduction of browse damage can be achieved.  相似文献   

Significance of Habitat and Stock Re-Testing for Enhancement of Natural Fisheries: Experimental Analyses with Queen Conch Strombus gigas     

Allan W.  Stoner 《Journal of the World Aquaculture Society》1994,25(1):155-165

The queen conch Strombus gigas is a large, commercially important gastropod mollusc native to the Caribbean region that has become severely depleted because of overfishing and habitat destruction. Over the last 10 yr attempts have been made to rehabilitate conch stocks through releases of hatchery-reared stocks, but successes have been few. Some of the reasons for high mortality in hatchery-reared conch are elucidated by recent experiments conducted at Lee Stocking Island in the central Bahamas.
Field experiments with juvenile queen conch indicate that sites with similar depths, sediments, and macrophyte cover do not provide equivalent food and shelter for conch. Transplants of conch were successful only in sites known to be historically significant as nursery grounds. While small-scale transplants can be used to screen potential outplant sites, only comprehensive understanding of the habitat requirements, behavior, feeding ecology, and predator-prey relationships will lead to long-term enhancement of fishery stocks. Differences in morphology, behavior, and habitat utilization between wild and hatchery-reared stocks also had significant effects on the survivorship and growth of outplanted stock. Therefore, hatcheries must develop culture methods that do not reduce the natural fitness of wild stock. Successful enhancement of natural fisheries through outplanting of hatchery-reared stocks depends upon: 1) development of hatchery animals sufficiently well adapted to survive in the field; and 2) release of the stock in suitable habitats at the optimal time. Close linkage between laboratory and field research, and hatchery operators will he necessary for the ultimate success of stock enhancement efforts.  相似文献   

Characterisation of influenza viruses isolated from turkeys in Great Britain during 1963--1977.     

D J Alexander  W H Allan  G Parsons 《Research in veterinary science》1979,26(1):17-20

Seven influenza viruses isolated from turkeys in Great Britain since 1963 were typed by haemagglutination inhibition and neuraminidase inhibition tests as: A/turkey/England/63 (Hav 1 Nav 3), A/turkey/England/66 (Hav 6 N2), A/turkey/England/69 (Hav 7 N2), A/turkey/Scotland/70 (Hav ? Neq 1), A/turkey/England/N28/73 (Hav 5 N2), A/turkey/England/110/77 (Hav 6 N2), A/turkey/England/647/77 /Hav 1 Neq 1). A/turkey/Scotland/70 failed to show a haemagglutinin relationship with any of the representative strains and may possess a hitherto unreported haemagglutinin subtype. Intravenous pathogenicity tests in six-week-old birds showed only A/turkey/England/63 to have high virulence for turkeys and chickens. A/turkey/England/69 produced some signs of disease in chickens and, to a lesser extent, turkeys but all other isolates were avirulent.  相似文献   

Response: GABA Receptor--Mediated Chloride Transport in a "Cell-Free" Membrane Preparation from Brain     

Harris RA  Allan AM 《Science (New York, N.Y.)》1986,233(4760):229

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Effects of predation: predation     

Allan JD 《Science (New York, N.Y.)》1987,238(4823):93-94

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Neutropenia with a probable hereditary basis in Border Collies     

Allan FJ  Thompson KG  Jones BR  Burbidge HM  McKinley RL 《New Zealand veterinary journal》1996,44(2):67-72

This paper documents a disease of Border Collies characterised by chronic neutropenia which probably resulted in recurrent bacterial infections manifesting as osteomyelitis and sometimes gastroenteritis. The neutropenia occurred despite hyperplasia of the myeloid cells in the bone marrow and a shift to the right in myeloid cell maturation. The underlying defect is currently unknown but may result from the inability of neutrophils to escape from the bone marrow into the peripheral circulation. Necrosis and new bone formation commonly involved the metaphyseal regions of long bones. Other findings included a fasting hypercholesterolaemia and the occasional presence of nucleated red blood cells in circulation, despite a non-regenerative anaemia. An autosomal recessive mode of inheritance is suspected. This condition has some features of a rare human disease called myelokathexis which is also believed to have in autosomal recessive mode of inheritance.  相似文献   

Reports     

Allan  Svensson 《Weed Research》1975,15(6):421-424

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Oral, nasal, and cutaneous eosinophilic granulomas in the black rhinoceros (Diceros bicornis): a lesion distinct from superficial necrolytic dermatitis.     

Allan P Pessier  Linda Munson  R Eric Miller 《Journal of zoo and wildlife medicine》2004,35(1):1-7

Oral, nasal, and cutaneous lesions resembling eosinophilic granulomas (EGs) were observed in eight captive black rhinoceroses (Diceros bicornis). Oral lesions were observed in all affected animals and occurred most often behind the prehensile lip. The typical clinical history of affected animals included oral bleeding or epistaxis from multilobulated, fungating, proliferative masses with areas of ulceration. Histologically, lesions were characterized by prominent infiltrates of eosinophils and rare foci of collagen degeneration on a background of marked submucosal or dermal neovascularization. Mucosal or epidermal hyperplasia was also present sometimes in association with distinctive epithelial degenerative changes consistent with superficial necrolytic dermatopathy of black rhinoceroses. Lesions of EG and superficial necrolytic dermatopathy were interpreted as being concurrently manifested in these cases. EG lesions spontaneously resolved over periods of 30 days-7 mo and were recurrent in three animals. Lesions were responsive to treatment with corticosteroids or to local cryotherapy with liquid nitrogen. Two animals treated with systemic corticosteroids died of disseminated fungal infections, emphasizing that corticosteroids should be used cautiously in black rhinoceroses.  相似文献   

The influence of soil properties on the rates of degradation of metamitron,metazachlor and metribuzin     

Richard Allen  Allan Walker 《Pest management science》1987,18(2):95-111

The rates of degradation of metamitron, metazachlor and metribuzin were measured in 12 mineral soils and the first order rate constants were compared with soil properties by regression analysis. Rates of metamitron degradation were best described by a multiple regression involving the silt content of the soil and the fraction of the total herbicide content which was available in the soil solution. Metazachlor degradation was best described by a multiple regression involving the sand content of the soil, the availability of the herbicide in the soil solution and soil microbial respiration. There was evidence that metribuzin degradation in any one soil was closely related to microbial activity, and rate constants per unit microbial respiration were derived for each soil. These rate constants were best described by a multiple regression involving the Freundlich adsorption constant and the sand content of the soils. The best regression equations for each herbicide were tested against observed degradation rates in an additional group of six soils. The calculated rates compared favourably with those observed for both metamitron and metazachlor, but with metribuzin, there was good agreement with one soil only.  相似文献