Essential fatty acid deficiency and Candida albicans infection in the chick     

R K Wagstaff  L S Jensen  S B Tripathy  S G Kenzy 《Avian diseases》1968,12(1):186-190

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Protein source and level for pregnant gilts: a comparison of corn, opaque-2 corn and corn-soybean meal diets   总被引：1，自引：0，他引：1  

D H Baker  D E Becker  A H Jensen  B G Harmon 《Journal of animal science》1970,30(3):364-367

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Influence of supplementation of all-rac-alpha-tocopheryl acetate preweaning and vitamin C postweaning on alpha-tocopherol and immune responses of piglets     

Lauridsen C  Jensen SK 《Journal of animal science》2005,83(6):1274-1286

This study was designed to test whether dietary maternal supplementation of all-rac-alpha-tocopheryl acetate during lactation and dietary vitamin C supplementation after weaning could increase the alpha-tocopherol status pre- and postweaning and the immune responses of piglets postweaning. The experiment involved 12 crossbred sows that were fed increasing levels of all-rac-alpha-tocopheryl (70, 150, and 250 IU/kg, as-fed basis) during lactation. After weaning (d 28 of age), litters were divided into two groups that were supplemented with or without vitamin C (500 mg/kg of feed, as-fed basis). Milk and blood samples were obtained from the sows during lactation. Pigs were bled at 4, 16, 28, 35, 42, and 49 d of age. Liver, heart, muscle, and s.c. adipose tissues were collected (on 28, 35, 42, and 49 d of age) and analyzed for alpha-tocopherol. On the same days, alveolar macrophages of the lungs were collected, and analyzed for the concentration of alpha-tocopherol and its stereoisomer composition, fatty acid composition, and release of prostaglandin E2, leukotriene B4, and thromboxane B2. Increasing dietary all-rac-alpha-tocopheryl acetate concentration increased the concentration of alpha-tocopherol in plasma (P = 0.02) and milk (P = 0.007) of sows, and the sow milk concentrations of alpha-tocopherol and vitamin A were greater on d 2 of lactation than later on during lactation. The plasma concentration of alpha-tocopherol in piglets decreased from d 4 to later on during suckling (P < 0.001) and again as the postweaning period progressed (P < 0.001). When lipid-standardized, plasma alpha-tocopherol was increased in piglets of sows fed 250 IU of all-rac-alpha-tocopheryl acetate compared with other sow-groups (P = 0.005). At 28 d of age, alpha-tocopherol concentrations in tissues were increased with supplementation of the high dietary all-rac-alpha-tocopheryl acetate levels to the sows; however, after weaning, a decrease in alpha-tocopherol concentration in most tissues (except liver) was observed, but the decrease tended to be less in the muscle (P = 0.099) and adipose tissue (P = 0.11) of piglets suckling sows fed 150 and 250 IU of all-rac-alpha-tocopheryl acetate. Vitamin C supplementation after weaning increased liver alpha-tocopherol (P = 0.01) and serum immunoglobulin M concentration (P = 0.04), and vitamin C supplementation increased the proportion of the RRR-alpha-tocopherol (P = 0.03) at the expense of the RRS-stereoisomer form (P = 0.05) of alpha-tocopherol in alveolar macrophages of the piglets. In conclusion, this study on maternal all-rac-alpha-tocopheryl acetate and postweaning vitamin C supplementation suggests a nutritional strategy for increasing alpha-tocopherol status and immune responses of weaned piglets.  相似文献   

Locomotive disorders associated with sow mortality in Danish pig herds     

Kirk RK  Svensmark B  Ellegaard LP  Jensen HE 《Journal of veterinary medicine. A, Physiology, pathology, clinical medicine》2005,52(8):423-428

Given the increase in sow mortality in Danish pig herds over the last 10 years, we have investigated the causes of spontaneous death and killing of sows, especially those due to locomotive disorders. A total of 265 culled sows (93 spontaneously dead sows and 172 killed sows) from 10 different herds were sent for complete necropsy, and grouped according to primary diagnoses. From 35 of these sows, tissue for histological evaluation and samples for bacteriological cultivation were also collected, and secondary diagnoses and body condition were recorded. The main causes for killing were related to the locomotive system (72%), arthritis (24%) and fractures (16%) being the most frequent lesions. The main causes of spontaneous death were related to the gastrointestinal system and spleen (45%) and the reproductive system (24%). Arthrosis was a secondary diagnosis in 88% of the killed sows and in 92.5% of the spontaneously dead sows. Arcanobacterium pyogenes was the main cause of arthritis. The killed sows had significantly lower body condition compared with spontaneously dead sows. The first two parities and the time around farrowing were associated with the highest mortality in both groups. Hopefully, these observations can guide breeding units attempting to monitor, control and reduce sow mortality.  相似文献   

Regulation of the erm(C) gene in Staphylococci from reservoir with different usage of macrolides     

Jensen LB  Aarestrup FM 《Acta veterinaria Scandinavica》2005,46(3):163-166

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The ulcus-syndrome in cod (Gadus morhua). III. A preliminary virological report.     

N J Jensen  B Bloch  J L Larsen 《Nordisk veterinaermedicin》1979,31(10):436-442

A bullet shaped virus presumably belonging to the Rhabdoviridae was isolated from a pool of 7 cods (Gadus morhua) with the ulcus-syndrome. This virus measured 55 x 175 nm. The virus caused CPE in PS (pike sarcoma) cells, but not in a number of other cell lines. From the same pool another virus was isolated in EPC (epithelia carp) cells. This virus was an icosahedron of 145 nm and most likely to be placed in the family Iridoviridae. Electronmicroscopic examination of papules from another 13 cods with the ulcus-syndrome failed to reveal any virus. Attempts to isolate virus from 33 individual cases of the ulcus-syndrome were successful in one single case only. The two viruses have not consistently been isolated from cods with the ulcus symdrome, but on the other hand they have never been isolated from cods without the ulcus-syndrome.  相似文献   

Electrocardiographic evaluation of potassium deficiency in young swine     

J L Cox  D E Becker  A H Jensen 《Journal of animal science》1966,25(1):203-206

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PHARMACOLOGICAL BASIS OF SMALL ANIMAL MEDICINE     

C. J. Jensen 《Australian veterinary journal》1981,57(6):267-267

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Effect of protein levels and opaque-2 corn on nitrogen metabolism in the sow and litter during the first and second lactation periods     

D C Mahan  D E Becker  A H Jensen 《Journal of animal science》1971,32(3):476-481

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Evaluation of histopathologic and physiologic changes in cows having premature births after consuming Ponderosa pine needles     

R Jensen  A C Pier  C C Kaltenbach  W J Murdoch  V M Becerra  K W Mills  J L Robinson 《American journal of veterinary research》1989,50(2):285-289

Premature calving, typified by early expulsion (17 to 43 days) of weak or dead calves and accompanied by retained placentas, was induced in 8 of 9 pregnant cows fed a mixture of Ponderosa pine needles and alfalfa hay. Five control cows of comparable gestation age fed only alfalfa hay maintained normal pregnancies until they were euthanatized at the time the pine needle-treated cows were producing premature calves. Serum specimens from all cows were assayed for progesterone concentration and ovaries and placentomes were examined for histopathologic changes. There were no bacterial, fungal, chlamydial, or viral agents determined to be associated with the premature births. Serum progesterone concentration in the treated cows decreased progressively and were 0.4 to 1.5 ng/ml at the time of premature calving. Histopathologic changes were evident in the placenta and corpora lutea of treated cows only. The number of binucleate trophoblastic giant cells in placentomes was less than normal and the number of necrotic luteal cells in corpora lutea was greater than normal.  相似文献