Annales de recherches veterinaires. Annals of veterinary research最新文献_第8页

Effects of selenium and vitamin E administration on breeding of replacement beef heifers. 硒和维生素E对替代肉牛繁殖的影响。

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

L F Laflamme, M Hidiroglou

引用次数: 0

[Transmissibility and pathogenicity in the red fox of two rabies viruses isolated at a 10 year interval]. [隔10年分离的两种狂犬病毒在红狐中的传播力和致病性]。

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

M F Aubert, J Blancou, J Barrat, M Artois, M J Barrat

{"title":"[Transmissibility and pathogenicity in the red fox of two rabies viruses isolated at a 10 year interval].","authors":"M F Aubert, J Blancou, J Barrat, M Artois, M J Barrat","doi":"","DOIUrl":"","url":null,"abstract":"Two rabies virus strains collected from naturally infected foxes in France in 1976 and 1986 were inoculated in 2 groups each consisting of 10 foxes (approximately 50 lethal doses50 mouse intracerebral per fox). Another 20 healthy foxes were kept in the same cages as the inoculated animals in order to study the transmission of both strains. All the inoculated foxes became rabid and transmitted rabies to their cage companion. The intervals between death of the inoculated foxes and death of the cage companion were significantly more variable (P less than 0.001) with the earlier strain, from 1 to 33 days compared to the range obtained with the later strain, 10-14 days. However, the mean intervals did not differ. Epidemiological consequences of such a decrease in variability, if confirmed in the field could decrease the epidemiological extent of rabies. Viremia was demonstrated in 2 foxes inoculated with the later strain but we cannot assume this to be a characteristic of this strain compared with the earlier strain. Rabies virus (both strains) was isolated from the saliva of foxes 29 days or less before the onset of clinical symptoms. This last result raises the question of the time limit as regards security before onset of clinical symptoms in animals involved in human contamination.","PeriodicalId":7914,"journal":{"name":"Annales de recherches veterinaires. Annals of veterinary research","volume":"22 1","pages":"77-93"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13198980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

[Isolation and identification of camel poxvirus in Morocco]. [摩洛哥骆驼痘病毒的分离鉴定]。

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

M el Harrak, C Loutfi, F Bertin

引用次数: 0

Discrimination of initiating and promoting carcinogens in fish. 鱼类致癌物的起始和促进区分。

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

A Anders, H Gröger, F Anders, C Zechel, A Smith, B Schlatterer

{"title":"Discrimination of initiating and promoting carcinogens in fish.","authors":"A Anders, H Gröger, F Anders, C Zechel, A Smith, B Schlatterer","doi":"","DOIUrl":"","url":null,"abstract":"Xiphophorine fish from wild populations are insusceptible of developing neoplasia. In contrast, certain backcrosses of Xiphophorus maculatus (platyfish) with Xiphophorus helleri (swordtail) as the recurrent parent produce offspring that develop neoplasia in a Mendelian fashion. We concentrated our research on melanoma. To construct a fish strain which is highly susceptible to mutagenic carcinogens, a particular regulatory gene, ie an oncosuppressor gene (Bs), was introduced into the fish developing the Mendelian inherited melanoma by introgression. Bs prevents the progeny from developing melanoma. However, Bs can be impaired by carcinogen-induced somatic mutation which gives rise to the development of clonal melanoma. Activity of the oncogene x-src (measured on pp60x-src kinase activity) and inositol lipid turnover is elevated in the tumor but, in contrast to the animals bearing the inherited melanoma, not in the brain. Tumor promoters do not induce melanoma in this strain. Similarly, in order to breed a fish strain which is highly susceptible to tumor promoters we introduced a regulatory gene, for instance an oncostatic gene (g) coding for a pretransformational arrest of pigment cell differentiation in the stem cell stage of the fish that develop the Mendelian inherited melanoma. The new strain is incapable of developing melanoma. Its x-src kinase activity and inositol lipid turnover is elevated in the brain, indicating that the biochemical processes which were found to be correlated with the hereditary melanoma formation, operate without the occurrence of melanoma. Following treatment of these animals with tumor promoters, melanoma develops within a very short latent period. Our tester strain can discriminate between tumor-initiating and tumor-promoting activities of agents of unknown carcinogenic potential.","PeriodicalId":7914,"journal":{"name":"Annales de recherches veterinaires. Annals of veterinary research","volume":"22 3","pages":"273-94"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13112129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anabolics: the approach taken in the USA. 合成代谢:美国采用的方法。

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

T M Farber

引用次数: 0

Does the admission procedure lack the fourth hurdle (socio-economic criteria)? 入学程序是否缺少第四个障碍(社会经济标准)?

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

H J Hapke

引用次数: 0

[The receptors for bacterial enterotoxins]. 细菌肠毒素的受体。

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

F Lucas, G Corthier

引用次数: 0

Metabolic changes in the rumen following protozoal inoculation of fauna-free sheep fed a corn silage diet supplemented with casein or soybean meal. 无动物群绵羊接种原生动物后瘤胃的代谢变化，以玉米青贮饲料为主，辅以酪蛋白或豆粕。

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

M Ivan, L L Charmley, L Neill, M Hidiroglou

{"title":"Metabolic changes in the rumen following protozoal inoculation of fauna-free sheep fed a corn silage diet supplemented with casein or soybean meal.","authors":"M Ivan, L L Charmley, L Neill, M Hidiroglou","doi":"","DOIUrl":"","url":null,"abstract":"Fauna-free wethers were fed bi-hourly a corn silage diet containing casein or soybean meal as a protein supplement. The wethers were inoculated via rumen cannula with a mixed population of ruminal ciliate protozoa. Ruminal fluid was sampled daily for 4 d before and for 13 d (and on d 28) after inoculation. Protozoal populations reached peak numbers on d 8 and decreased to new levels after d 9 for wethers on both supplements. Protozoa decreased (P less than 0.01) the concentrations of total volatile fatty acids, increased (P less than 0.01) the pH and decreased (P less than 0.01) he concentrations of total and non-ammonia nitrogen in ruminal fluid. The concentrations of ammonia nitrogen increased with increasing numbers of protozoa for wethers on both supplements, but the concentrations decreased after d 7 to approximately pre-inoculation levels for the casein-supplemented diet. The increasing numbers of protozoa were associated with the increased concentrations of total and free alpha-amino nitrogen (P less than 0.01) and sulfide (P less than 0.05) and with the decreased concentrations of soluble Cu (P less than 0.05) in the ruminal fluid in soybean meal-supplemented wethers but not in those receiving casein. It was concluded that dietary proteins with differing physical characteristics are metabolized to a different extent by ruminal ciliate protozoa, which in turn can affect the metabolism of other dietary nutrients such as nitrogen and sulfur and contribute to copper-sulfur interaction.","PeriodicalId":7914,"journal":{"name":"Annales de recherches veterinaires. Annals of veterinary research","volume":"22 2","pages":"227-38"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13057103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Immunomodulatory effects in vivo of recombinant porcine interferon gamma on leukocyte functions of immunosuppressed pigs. 重组猪干扰素γ对免疫抑制猪白细胞功能的体内免疫调节作用。

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

D Saulnier, S Martinod, B Charley

引用次数: 0

An aetiological hypothesis for the nutrition-induced association between retained placenta and milk fever in the dairy cow. 残留胎盘与奶牛乳热之间营养诱导关联的病原学假说。

Annales de recherches veterinaires. Annals of veterinary research Pub Date : 1991-01-01

J Barnouin, M Chassagne

引用次数: 0