Diagnostic and clinically important aspects of cyanobacterial (blue-green algae) toxicoses   总被引：2，自引：0，他引：2  

V R Beasley  A M Dahlem  W O Cook  W M Valentine  R A Lovell  S B Hooser  K Harada  M Suzuki  W W Carmichael 《Journal of veterinary diagnostic investigation》1989,1(4):359-365

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PCR for antigen receptor rearrangement (PARR) clonality testing in a horse with a solitary retropharyngeal lymphoma     

E. M. Collar  J. E. Parker  E. M. Gorman  D. S. Russell  B. A. Valentine 《Equine Veterinary Education》2019,31(8):413-418

A 19-year-old Quarter Horse gelding was evaluated for respiratory distress and a rapidly enlarging retropharyngeal mass. Initial evaluation revealed severe respiratory distress, and a large, firm mass, visibly appreciable as 12 × 12 cm, in the left retropharyngeal and perilaryngeal region, with surrounding left and right retropharyngeal swelling. No significant abnormalities were present on complete blood count and serum biochemistry analyses. Endoscopy revealed severe pharyngeal collapse restricting airflow without gross abnormalities of the pharyngeal mucosa other than inflammation and irritation. A multilobular retropharyngeal mass, diffusely heterogeneous in echogenicity, was present adjacent to, but not occluding, the carotid artery as assessed by ultrasonography. Initial needle aspirate suggested lymphoma. Tissue biopsy and histopathology confirmed a round cell tumour. A temporary tracheotomy was performed to provide respiratory relief, and the horse was managed on oral antibiotics and anti-inflammatory medications while awaiting histopathological results. The decision was made to humanely euthanise the horse after biopsy results indicated lymphoma. Definitive diagnosis of T cell rich, large B cell lymphoma was made by combination of cytology, immunohistochemistry and molecular clonality PCR (PARR) testing. Lymphoma should be considered in horses with focal masses of the retropharyngeal region. Although treatment was not pursued, PARR testing was successful in this case and may be helpful for accurate characterisation of lymphoma in horses to more precisely determine prognosis and the most effective treatment plans, as it has been in human patients and small animals.  相似文献   

Severe rhabdomyolysis due to polysaccharide storage myopathy in an Arabian mare     

C. T. Estill  B. A. Valentine 《Equine Veterinary Education》2007,19(3):139-142

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Out of the tropics: evolutionary dynamics of the latitudinal diversity gradient     

Jablonski D  Roy K  Valentine JW 《Science (New York, N.Y.)》2006,314(5796):102-106

The evolutionary dynamics underlying the latitudinal gradient in biodiversity have been controversial for over a century. Using a spatially explicit approach that incorporates not only origination and extinction but immigration, a global analysis of genera and subgenera of marine bivalves over the past 11 million years supports an "out of the tropics" model, in which taxa preferentially originate in the tropics and expand toward the poles without losing their tropical presence. The tropics are thus both a cradle and a museum of biodiversity, contrary to the conceptual dichotomy dominant since 1974; a tropical diversity crisis would thus have profound evolutionary effects at all latitudes.  相似文献   

Gastric adenocarcinoma in a horse with portal vein metastasis and thrombosis: a novel cause of hepatic encephalopathy     

Patton KM  Peek SF  Valentine BA 《Veterinary pathology》2006,43(4):565-569

A 17-year-old Quarter horse mare was referred to Cornell University for postmortem examination after 72 hours of encephalopathy that consisted of depression, mania, and blindness. A plasma sample and cerebral spinal fluid demonstrated hyperammonemia. Gross necropsy examination findings included the following: mild icterus, a transmural mass in the glandular portion of the gastric fundus, multiple masses throughout the liver, and a large tumor thrombus in the portal vein. Microscopically, the gastric mass, hepatic masses, and portal vein thrombus were composed of similar neoplastic epithelial cells that formed variably sized acini and branching cords separated by a dense desmoplastic stroma. Throughout the cerebral frontal cortex were numerous Alzheimer type II astrocytes. Hepatic encephalopathy was caused by gastric adenocarcinoma, with metastasis to the liver and the portal vein. The clinical and pathologic lesions from this unique case, as well as hyperammonemia and portal vein thrombosis in the pathogenesis of hepatic encephalopathy, are discussed.  相似文献   

Reconstructing harvesting diameter distribution from aggregate data     

Valentine Lafond  Thomas Cordonnier  François De Coligny  Benoît Courbaud 《Annals of Forest Science》2012,69(2):235-243

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Distribution of removed trees among species and diameter classes is usually used to characterize selection harvesting. This information is, however, rarely available when analysing past time series. The challenge is then to determine the minimal level of information required to characterize harvests.  相似文献   

B-cell leukemia in a sheep     

Valentine BA  McDonough SP 《Veterinary pathology》2003,40(1):117-119

Necropsy examination was performed on an 8.5-year-old Finnish ewe euthanatized because of progressive respiratory distress, cachexia, and weakness. Significant postmortem findings included a diffusely enlarged, dark-red friable liver, mild splenomegaly, and mild mesenteric lymphadenopathy. Examination of multiple tissue sections revealed intravascular atypical mononuclear cells in all tissues examined, with a leukemic pattern of infiltration of mesenteric lymph nodes, liver, lung, and spleen. Neoplastic cells were positive for CD79a and negative for CD-3, BLA.36, and CD68 leukocytic markers. The final diagnosis was B-cell leukemia.  相似文献   

Cats with hyperthyroidism     

Malik R  Charlton V 《Journal of Feline Medicine and Surgery》2002,4(3):127-128

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Automated identification of invasive rabbitfishes in underwater images from the Mediterranean Sea     

Valentine Fleuré  Camille Magneville  David Mouillot  Sébastien Villéger 《水产资源保护:海洋与淡水生态系统》2024,34(1):e4073

Compression characteristics of a clay soil as influenced by crops and sampling dates     

J. Lafond  D. A. Angers  M. R. Laverdi  re 《Soil & Tillage Research》1992,22(3-4):233-241

This study was undertaken to determine the influence of previous crop sequences on soil compression behaviour. Soil compression tests were performed on undisturbed soil samples of a Kamouraska clay which had been cropped continuously for 4 years to barley, corn, alfalfa, or timothy. Samples were taken from the surface soil in the non-trafficked zone, five times during the season. Cropping treatments had small but significant effects on soil compression characteristics. Soils on which crops were grown presented lower bulk density under standard compression (300 kPa) and higher pre-compression pressure values than the soil left unplanted (fallow). These effects were attributed to water content at time of sampling which was lower in the cropped than in the bare soils. Seasonal variations of these two virgin compression parameters were important and were related to soil moisture. Conversely, the soil compression index (slope of the virgin compression line) was not affected by crops or water content and seems to be a characteristic dependent on soil constituents.  相似文献