Poloxalene as an Anti-Bloat Compound and Its Effect on Milk Yield and Composition   总被引：1，自引：0，他引：1       下载免费PDF全文

L. M. Bezeau  R. D. Clark    R. J. Gray 《Canadian journal of veterinary research》1967,31(12):352-353

Poloxalene, a nonionic surfactant, was fed to beef cattle on a legume ration or a high grain ration to observe its effect on bloat. It was also fed to lactating dairy cows to note any effect on yield or composition of milk.

Poloxalene was beneficial in the prevention of bloat with both legume and grain rations. It had no effect on per cent fat, protein, solids-not-fat, or yield of milk.

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Experimental ovine listeriosis. 3. Inoculation of rams     

R E Smith  I M Reynolds  G W Clark 《The Cornell veterinarian》1968,58(3):480-486

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Experimental acute toxicity of orally administered sodium selenite in lambs     

C Caravaggi  F L Clark  A R Jackson 《Research in veterinary science》1970,11(5):501-502

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Equine Protozoal Myeloencephalitis: A Report of Two Cases From Western Canada   总被引：1，自引：1，他引：0       下载免费PDF全文

E. G. Clark  H. G. G. Townsend    N. T. McKenzie 《The Canadian veterinary journal. La revue veterinaire canadienne》1981,22(5):140-144

Two cases of nonsuppurative myeloencephalitis are reported which clinically and pathologically resemble equine protozoal myeloencephalitis. Lesions in both horses were associated with Toxoplasma-like organisms visible in microscopic sections. Clinical signs and lesions in one case primarily involved the brain and in the other case principally involved the spinal cord and associated meninges. Positive identification of the organisms was not achieved; however, the etiological agent is unlikely to be a species of Toxoplasma. Recently published studies suggest a species of Sarcocystis is involved.  相似文献   

Serum protein electrophoresis and serum transaminase activity of dogs with canine distemper     

L M Snow  M J Burns  C H Clark 《American journal of veterinary research》1966,27(116):70-73

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Analysis of the electrocardiograms of 100 normal goats   总被引：3，自引：0，他引：3  

M Szabuniewicz  D R Clark 《American journal of veterinary research》1967,28(123):511-516

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Salmonella Brandenburg--emergence of a variant strain on a sheep farm in the South Island of New Zealand     

Clark RG  Swanney S  Nicol CM  Leyland M  Fenwick SG 《New Zealand veterinary journal》2003,51(3):146-147

Salmonella Brandenburg was initially diagnosed in New Zealand in an aborted ewe from a Merino flock in mid-Canterbury in1996. The following year, the disease occurred on farms in mid-Canterbury and on one farm near Winton in Southland (Bailey1997). Since then, this bacterium has caused widespread abortion and deaths in pregnant ewes in Southland, coastal Otago and south- and mid-Canterbury. In cattle, the same organism has caused diarrhoea and dysentery in calves and adult cattle, and abortions and deaths in first-calving cows and, to a lesser extent, in second-calving and older cows. Salmonella Brandenburg has also caused diarrhoea and fetal deaths in dogs, and diarrhoea and deaths in foals. The outbreak strain has been extensively studied using pulsed-field gel electrophoresis (PFGE). All isolates tested to date have had an indistinguishable molecular pattern with the exception of a single isolate from a sheep-yard dust sample recovered in October 2000 that is the subject of this report. The molecular pattern of the variant strain differed from that of the epidemic strain by the absence of one high molecular weight band and the addition of three lower molecular weight bands.  相似文献   

Immunophenotype and functional properties of feline dendritic cells derived from blood and bone marrow     

Bienzle D  Reggeti F  Clark ME  Chow C 《Veterinary immunology and immunopathology》2003,96(1-2):19-30

Dendritic cells (DCs) are a heterogeneous population of cells of fundamental importance in initiating innate as well as specific immune responses. The identity and function of DCs in the cat are unknown, although they are likely pivotal in the response to infection. In this study, feline DCs were derived by 3-10-day culture of adherent blood mononuclear cells (PBMCs) and bone marrow mononuclear cells (BMMCs) in the presence of IL 4 and GM-CSF. BMMC consistently yielded a greater number of DCs than PBMC, and there were fewer macrophages than DC from both compartments. DCs expressed a distinct constellation of surface molecules, which included CD1a, CD1b, and CD1c, CD11b, CD14, and 2-3-fold higher levels of MHC class I and II molecules than co-cultured macrophages or fresh blood monocytes. DCs displayed typical cytoplasmic processes, limited non-specific esterase activity, and acquired antigen by phagocytosis, pinocytosis, and binding to specific receptors. Cytokine-exposed cells induced proliferation of allogeneic lymphocytes. Thus, the cells derived by these culture conditions had markers and functions analogous to immature myeloid DCs. Availability of feline DCs will enable investigation of their role in infectious disease and their potential therapeutic application.  相似文献   

Temporal,environmental and management factors influencing the epidemiological patterns of sea lice (Lepeophtheirus salmonis) infestations on farmed Atlantic salmon (Salmo salar) in Scotland     

Revie CW  Gettinby G  Treasurer JW  Rae GH  Clark N 《Pest management science》2002,58(6):576-584

In association with industry, an extensive database has been established on measurements of sea louse counts on farmed Atlantic salmon for the years 1996 to 2000 from 33 Scottish fish farms. These data include extensive counts on the sea louse species, Lepeophtheirus salmonis, at various stages of the life cycle and in particular the chalimus and mobile stages. There has been considerable speculation as to what factors might affect the abundance of sea lice, much of which is based on limited evidence. Our analyses show that there is tremendous variation in sea louse infestation patterns from year to year, whereas stock type, geographical region and coastal exposure do not appear to affect mean levels of abundance. In contrast, treatments lead to pronounced cycles of sea louse infestation with peaks and troughs at 3-week intervals, and these interventions are important if the sea louse levels on fish are to be controlled. There was no evidence of water temperature affecting the mean annual abundance of sea louse infestation.  相似文献   

Unusual outbreak of sporozoan encephalomyelitis in Bluefaced Leicester ram lambs     

Sargison ND  Schock A  Maclean IA  Rae A  Heckeroth AR  Clark AM 《The Veterinary record》2000,146(8):225-226

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