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排序方式: 共有195条查询结果,搜索用时 15 毫秒
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G.W. Burgess B.V.SC. PH.D. Q.D.A.H. B.J. Stevenson B.SC. B.V.SC. D.V.P.H. J.R. Buddle B.SC. B.V.SC. D.V.P.H. M.A.C.V.SC. G.W. Lash B.V.SC. 《New Zealand veterinary journal》2013,61(9):214-215
Extract Sir, — Four suckling piglets have been examined at this laboratory from a Taranaki herd in which sudden death, chorea and convulsions were the clinical features. 相似文献
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A.N. Bruere B.V.SC. PH.D. M.R.C.V.S. 《New Zealand veterinary journal》2013,61(8):173-174
Extract Sir,—I should like to make a request to interested veterinarians for live specimens of the rare condition in sheep — testicular feminization. 相似文献
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Julie Bebak Craig Shoemaker Covadonga Arias Phillip Klesius 《Aquaculture Research》2011,42(2):169-176
Recovery of bacteria from infected fish during population sampling can be affected by factors including the type of assay, method of specimen preservation and concentration of bacteria present. Consequently, before use in field sampling, methods should be validated. The three objectives of this study were, first, to determine whether a channel catfish Ictalurus punctatus (Rafinesque) fingerling classified as positive for Gram‐negative Edwardsiella ictaluri infection according to bacterial culture before freezing was also classified as positive after freezing, second, to determine how direct culture from the kidney (DIRECT), culture of homogenate (HOMOG) and standard PCR (PCR) agree with bacterial culture in terms of classifying fish as positive or negative and third, to estimate diagnostic sensitivity (dSe) and diagnostic specificity (dSp) for DIRECT, HOMOG and PCR. In fresh and frozen fish, as bacterial concentration decreased, the ability of each assay to detect positive fish also decreased, especially when there were <104 colony‐forming units per gram (CFU g?1) tissue. HOMOG proved to be the most reliable at correctly classifying catfish, whether they were subclinically or clinically infected. PCR assay was the least reliable. Overall, values for this study population for dSe were 0.66, 0.92 and 0.43, and for dSp were 0.86, 0.91 and 0.95, for DIRECT, HOMOG and PCR respectively. 相似文献
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Chhorn Lim Julio C. Garcia Mediha Yildirim-Aksoy Phillip H. Klesius Craig A. Shoemaker Joyce J. Evans 《Journal of the World Aquaculture Society》2007,38(2):231-237
This study was conducted to evaluate the effect of dietary levels of distiller’s dried grains with solubles (DDGS) on growth, body composition, hematology, and resistance of Nile tilapia, Oreochromis niloticus, to Streptococcus iniae challenge. Five isocaloric diets containing DDGS at levels of 0, 10, 20, and 40%, and 40% DDGS + lysine (Diets 1–5) as partial replacements of a combination of soybean meal (SBM) and corn meal (CM) on an equal protein basis were fed to juvenile Nile tilapia (9.41 ± 0.14 g) for 10 wk. Fish fed Diet 4 had the lowest weight gain (WG), feed efficiency ratio, protein efficiency ratio (PER), and whole‐body protein. Supplementation of lysine to the 40% DDGS diet (Diet 5) improved WG and PER. Hematological and immunological parameters were not affected by dietary treatment. There were no significant differences among the average number of days to first mortality after S. iniae challenge and cumulative mortality 14 d postchallenge among fish in various treatments. DDGS can be incorporated in tilapia diet at a level of 20% as a substitute for a combination of SBM and CM without affecting their growth performance, body composition, hematological parameters, immune response, and resistance to S. iniae infection. 相似文献
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Eosinophil chemotactic factor (ECF) was localized predominantly in the intestinal cells and lateral hypodermal cords of developing fifth stage larvae (L5) of Ostertagia ostertagi within abomasal tissue cross-sections by peroxidase in an antibody sandwich technique using monoclonal antibody to ECF. Cooperia oncophora larvae in tissue cross-sections did not stain using this technique. These experiments demonstrate that ECF is localized in Ostertagia ostertagi organelles and is probably released by the developing L5 into the abomasal tissue surrounding the parasitized gland. The presence of ECF within O. ostertagi larvae in situ and the results of previous experiments demonstrated in vitro and in vivo ECF chemotactic activity help to explain why eosinophils are observed histologically in abomasal tissues from cattle with ostertagiasis. 相似文献
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