MAGNETIC RESONANCE IMAGING APPEARANCE OF SUSPECTED ISCHEMIC MYELOPATHY IN DOGS     

Carley J. Abramson  Laurent Garosi  Simon R. Platt  Ruth Dennis  J. Fraser McConnell 《Veterinary radiology & ultrasound》2005,46(3):225-229

Ischemia and infarction of the spinal cord is a known cause of acute spinal injury in dogs. Currently, the diagnosis of spinal cord infarction in small animals is based on history, clinical signs, and the exclusion of other differentials with radiography and myelography. It is a diagnosis only confirmed through necropsy examination of the spinal cord. The aim of this paper is to describe the Magnetic resonance imaging (MRI) findings of the spinal cord of dogs with suspected spinal cord infarcts to utilize this technology for antemortem support of this diagnosis. This retrospective study evaluated the spinal MR examinations of 11 dogs with acute onset of asymmetric nonpainful myelopathies. All patients except one (imaged at 2 months) were imaged within 1 week of clinical signs and managed conservatively with minimal medical and no surgical intervention. They were followed clinically for a minimum of 4 months after discharge. MR findings in all dogs were characterized by focal, intramedullary, hyperintense lesions on T2-weighted images with variable contrast enhancement similar to what is reported in humans. Though it could not be used to diagnose spinal cord infarction definitively, MRI was useful in excluding extramedullary spinal lesions and supporting intramedullary infarction as a cause of the acute neurologic signs. Together with the history and clinical examination findings, MRI is supportive of a diagnosis of spinal cord infarction.  相似文献   

The transmission by nematodes of tobraviruses is not determined exclusively by the virus coat protein     

Stuart A. MacFarlane  Derek J. F. Brown  John F. Bol 《European journal of plant pathology / European Foundation for Plant Pathology》1995,101(5):535-539

The coat protein gene of the nematode non-transmissible, SP5 isolate of pea early-browning tobravius was replaced with that of the highly nematode transmissible, PPK20 isolate of tobacco rattle tobravirus. Plants were infected with the recombinant virus when mechanically inoculated and the virus invaded the plants systemically. However, although the PPK20 isolate of TRV was transmitted by nematodes from these plants, the recombinant virus was not transmitted. Therefore, the virus coat protein is not the exclusive determinant of nematode transmission.  相似文献   

Transmission electron microscopy of the vertical crystal layer and cuticle of the eggshell of the domestic fowl     

Fraser AC  Bain MM  Solomon SE 《British poultry science》1999,40(5):626-631

1. Eggshell pieces (1 cm2) were decalcified using a solution of EDTA (200 g/litre, pH 6.9 to 7.0) in paraformaldehyde (2 g/litre) and glutaraldehyde (0.5 g/litre) in phosphate buffer. 2. They were prepared for transmission electron microscopy (TEM). 3. TEM identified a vertically aligned matrix associated with the vertical crystal layer (VCL). It is hypothesised that the vertical orientation of calcite crystals in the VCL is closely linked to this vertical matrix. 4. TEM also revealed the presence of a 2-layered cuticle, the inner layer containing vesicles which were absent in the outer. 5. Cuticular vesicles contain hydroxyapatite and are thought to play a role in the termination of shell formation. The current paper presents data relating to microbial apatitic systems that strengthen this hypothesis.  相似文献   

The British Veterinarian and modern sheep reproduction     

A F Fraser 《The Veterinary record》1973,92(22):585-588

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Developments in veterinaryscience. Formal recognition of veterinary clinical competence.          下载免费PDF全文

C M Fraser 《The Canadian veterinary journal. La revue veterinaire canadienne》1969,10(3):59-60

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The education of the Canadian veterinary officer--circa 1980.          下载免费PDF全文

C M Fraser 《The Canadian veterinary journal. La revue veterinaire canadienne》1974,15(1):11-14

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Acute granulocytic leukemia in cats     

C J Fraser  G N Joiner  J H Jardine  C A Gleiser 《Journal of the American Veterinary Medical Association》1974,165(4):355-359

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Infertility in goats related to testicular atrophy     

Andrew F. Fraser 《Tropical animal health and production》1971,3(3):173-182

Summary Testicular atrophy in the goat is described as a principal factor in goat infertility. The clinical features of the condition are apparent in reduced testicular size and altered testicular shape. The semen picture is markedly affected: there are reduced numbers of sperms and an associated high incidence of abnormal sperm forms.

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Sumario Se describe a la atrofia testicular en cabras como un factor principal en la infertilidad de los caprinos. Las características clínicas de la condición son aparentes por el tama?o testicular reducido y por la alteración de la forma testicular. El cuadro del semen esta marcadamente afectado, habiendo un número reducido de espermatozoides, con una alta incidencia de formas de espermatozoides anormales.

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Résumé L'atrophie testiculaire est, chez le bouc, la cause majeure de son infertilité. Cliniquement elle se traduit par la diminution sensible du volume des testicules et l'altération de leur forme. L'image du sperme est caractérisée par la pauvreté en spermatozoides avec un nombre élevé de formes anormales.

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A case history of psittacosis in the dog   总被引：2，自引：0，他引：2  

G Fraser  J Norval  A R Withers  W W Gregor 《The Veterinary record》1969,85(3):54-58

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A clinical study of ram infertilities in Scotland     

A F Fraser  J H Penman 《The Veterinary record》1971,89(6):154-158

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