AGENESIS OF THE DISTAL PHALANX IN A MULE     

T.S. Taylor  DVM  MS  E. L. Morris  DVM  MS 《Veterinary radiology & ultrasound》1983,24(2):63-65

Agenesis of the distal phalanx of a mule foal is documented. The condition was identified when the foal was 14 days old and supported by follow-up radiographs obtained at four months of age.  相似文献   

Laryngotracheitis outbreak limited to a part of a chicken flock exposed to smoke and chemicals     

M P Morris  S A Davison  R J Eckroade 《Avian diseases》1986,30(4):843-846

Laryngotracheitis was diagnosed in a flock of molted, caged table-egg-layers. Morbidity was restricted to an area of the house in which the birds had been exposed to smoke from a fire in the house and to a powdered chemical fire-extinguisher used on the fire. Mortality in this group began to rise 6 days after the fire and continued to be above normal for about 3 weeks. Feed consumption dropped for about 1 1/2 weeks after the fire but was normal or above normal during the rest of the disease outbreak. Egg production dropped slightly for 1 week after the fire, then returned to normal. Microscopic tracheitis in the exposed birds continued for 11 weeks after the fire. Hens outside of the smoke-affected area did not show histopathological changes or shed laryngotracheitis virus.  相似文献   

Pancytopenia caused by bone marrow aplasia in a horse   总被引：1，自引：0，他引：1  

J P Lavoie  D D Morris  J G Zinkl  K Lloyd  T J Divers 《Journal of the American Veterinary Medical Association》1987,191(11):1462-1464

Pancytopenia was evaluated in a mature Quarter Horse gelding. A diagnosis of bone marrow aplasia was made on the basis of bone marrow hypocellularity. History of drugs administered included penicillin, oxytetracycline, trimethoprim-sulfadiazine, phenylbutazone, dipyrone, flunixin meglumine, and isoxsuprine. Clinical remission was observed after treatment with glucocorticoids, androgens, and broad-spectrum antimicrobials.  相似文献   

Effects of dietary protein concentration on the response of growing chicks to methionine.     

T R Morris  R M Gous  S Abebe 《British poultry science》1992,33(4):795-803

1. Experiments were conducted independently at two stations to measure the requirement for methionine in chick diets with crude protein (CP) varying in 8 steps from 140 to 280 g/kg diet (experiment 1) or from 90 to 300 g/kg (experiment 2). 2. Protein composition was the same at all protein concentrations within a trial. The diet was designed to be first-limiting in methionine and DL-methionine was added to provide 5 ratios of methionine to CP at each protein concentration. 3. Methionine required for maximum growth rate or maximum efficiency of food utilisation was estimated at each protein concentration by fitting a quadratic regression equation to the relevant data. The requirement was also estimated by fitting the Reading model to data for growth rate and methionine intake. 4. In both trials and by all three methods of estimation, the methionine requirement (g/kg diet) for maximum performance increased as a linear function of dietary CP concentration and nearly in direct proportion to CP. 5. It is concluded that diets which contain surplus protein, beyond that needed to maximise growth rate or food efficiency, need supplementation with methionine beyond that required when dietary protein is just adequate. A suitable rule for practical formulation is that methionine concentration in chick diets should be not less than 0.025 times the dietary CP concentration.  相似文献   

Serum alkaline and acid phosphatase activity and inorganic phosphate in goat     

S C Adaval  I D Morris  S G Khare 《The Indian veterinary journal》1969,46(6):485-490

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Response of the badger (Meles meles) to infection with Brucella abortus     

M J Corbel  J A Morris  C J Thorns  D W Redwood 《Research in veterinary science》1983,34(3):296-300

Three badgers exposed to conjunctival instillation of Brucella abortus strain 544 developed a mild subclinical infection accompanied by the production of agglutinating and complement fixing antibodies. Six months after inoculation, the infection could not be detected in one badger and was confined to lymphoid tissue in the other two. No cell mediated immune response to B abortus antigens could be detected by in vitro lymphocyte transformation tests or intradermal tests for delayed hypersensitivity during the observation period.  相似文献   

Management and environmental factors associated with annual sow culling rate: A path analysis     

S. D''Allaire  R. S. Morris  F. B. Martin  R. A. Robinson  A. D. Leman 《Preventive veterinary medicine》1989,7(4):255-265

The relationships between management and environmental factors and annual sow culling rate were investigated in 152 Minnesota swine breeding herds. Data were obtained through a postal survey. A general path model was hypothesized to describe relationships among variables. Multiple least-squares and logistic regressions were used to test the statistical significance of pathways. The associations between the indepen variables and the annual culling rate (ACR) were decomposed into direct, indirect, and common cause associations.

The mean ACR of the 152 farms was 39% ± 2% rm(SE). Using path-analysis techniques, only the type of flooring during gestation, the size of the herd and the lactation length had a direct relationship with ACR. The type of housing during gestation and farrowing were related indirectly to the ACR. Their association was mediated by the type of flooring during gestation and the weaning age. Herds housing their sows in total confinement during gestation were most likely to keep them on partially or totally slatted floors which were associated with a higher ACR. Sows kept in crates during the farrowing period were more likely to have a short lactation length which was associated with a higher ACR.

Most associations between the use of preventive veterinary services and the ACR were due to association with other variables. Herds using veterinary preventive medicine were most likely to have a short lactation length, a large number of females, and sows housed in total confinement during gestation and in crates during the farrowing period. All of the aforementioned variables were associated with a high ACR.

The relationships of other management and environmental factors with the ACR were due to common cause associations. These factors included having the sows individually identified, using a more comprehensive recording system, mainly a hand-mating system, testing regularly for pregnancy and housing sows in total confinement during the breeding period. The strongest associations with the ACR were the type of flooring during gestation and the size of the herd.  相似文献   

Rabies in a horse.     

R J Marler  D R Howard  P G Morris  J L Johnson 《Journal of the American Veterinary Medical Association》1979,175(3):293-294

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Electrophoresis Study of Extracts of Submaxillary Salivary Glands from Naturally Rabid Dogs          下载免费PDF全文

Morris D. Schneider  Yutaka Furusho 《Canadian journal of veterinary research》1965,29(8):195-200

Rabies virus in submaxillary salivary glands from naturally infected dogs was investigated by a paper electrophoresis technique, and the virus activity was quantitated by intracerebral titration in mice. Extracts from these salivary glands were found to contain (a) 10⁴ to 10⁶ mouse ICLD ₅₀ units of wild rabies seed and (b) a protein complex that migrated electrophoretically in the albumin band and more conspicuously in the beta and gamma bands of normal horse serum. The protein complex was interpreted to comprise aggregates of neutralizing antirabies antibody.  相似文献   

世界猪病的发展与演变(续)     

冯汉利  吴斌 《养殖与饲料．饲料世界》2003,(3):44-46

17 群体水平上的复合病因网络 在集约化生产系统中,我们面临的大多数疾病都有着复杂的成分因素。其中一些可能是必要因素,如果没有他们的存在疾病也就无从发生,但当他们独自起作用时却并不是充分原因。“Koch’s”假设有其局限性,只有对疾病病因作现场检验时才起作用。那些病原单独存在并且是必要充分原因的疾病通常是最易  相似文献