Cliniconeuropathologic findings of familial frontal lobe epilepsy in Shetland sheepdogs          下载免费PDF全文

T. Morita  A. Shimada  T. Takeuchi  Y. Hikasa  M. Sawada  S. Ohiwa  M. Takahashi  N. Kubo  T. Shibahara  H. Miyata    E. Ohama 《Canadian journal of veterinary research》2002,66(1):35-41

We examined an epileptic focus by electroencephalography (EEG) by using an international 10-20 electrode system in 11 Shetland sheep dogs affected with familial idiopathic epilepsy. We also performed an evaluation of the amino acids in the cerebrospinal fluid (CSF) and a pathologic examination of the brains of 8 dogs that died from status epilepticus. Continuous electroencephalography demonstrated that an epileptic focus was initially detected in the frontal lobe, particularly the internal area, and that paroxysmal foci developed diffusely in other lobes of affected dogs with recurrent convulsions. The EEG analyses indicated spike and sharp wave complexes, which were considered to be paroxysmal discharges. An increased value for glutamate or aspartate was found in the CSF of some epileptic dogs. Histologically, acute neuronal necrosis and astrocytosis were distributed predominantly in the cingulate cortex and internal area of frontal cortex, less frequently in other areas of the cerebrum. The results of this study suggest that, initially, the dogs have an epileptic focus in the frontal lobe, and that the focus extends gradually to other areas of the cerebrum. Based on the distribution of neuronal necrosis and astrocytosis, acute neuronal damage may be related to the superexcitation of neurons following epilepsy.  相似文献   

Plectosporium blight of monkshood caused by <Emphasis Type="Italic">Plectosporium tabacinum</Emphasis>     

Keisuke Tomioka  Yuuri Hirooka  Toshirou Nagai  Hiroyuki Sawada  Takayuki Aoki  Toyozo Sato 《Journal of General Plant Pathology》2011,77(4):266-268

Severe blight of potted seedlings of monkshood caused by Plectosporium tabacinum was found in glasshouses in Kagawa Prefecture in southwest Japan in May 2001. Root rot and browning of stem bases were followed by wilting and yellowing of leaves, then blighting of leaves, flower buds and stems. A fungus was isolated from diseased plants and confirmed to cause the disease. The new disease was named “Plectosporium blight of monkshood”.  相似文献   

An outbreak of fowl cholera in wild ducks (Rosyibilled pochard) in Japan     

Y Fujihara  M Onai  S Koizumi  N Satoh  T Sawada 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1986,48(1):35-43

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Enzymatic profiles of Erysipelothrix rhusiopathiae and Erysipelothrix tonsillae     

T Takahashi  Y Tamura  T Sawada  S Suzuki  M Muramatsu  T Fujisawa  Y Benno  T Mitsuoka 《Research in veterinary science》1989,47(2):275-276

The enzymatic activities of 39 strains of Erysipelothrix rhusiopathiae and 34 of E tonsillae were determined with the API ZYM system. The profiles of these two species were very similar, differing solely in N-acetyl-beta-glucosaminidase activity. Whereas 90 per cent of strains of E rhusiopathiae exhibited strong activity with N-acetyl-beta-glucosaminidase, positive reactions were observed for this enzyme in only 24 per cent of strains of E tonsillae. These results support previous DNA-DNA hybridisation studies and suggest that E tonsillae is a new species of the genus Erysipelothrix.  相似文献   

Protective effect of sera from swine immunized with different fractions from broth culture of an attenuated strain of Erysipelothrix rhusiopathiae     

T Sawada  T Takahashi  Y Tamura 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1987,49(1):37-42

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Antiserum against culture filtrate is cross-protective for various serovars of Erysipelothrix rhusiopathiae     

T Sawada  T Takahashi  Y Tamura 《Veterinary microbiology》1987,14(1):87-93

The protective effect of porcine antiserum prepared against culture filtrate (CF) of an attenuated strain of Erysipelothrix rhusiopathiae (serovar 2) in mice to challenge with 20 virulent strains of 18 serovars and one type N was investigated. Passively immunized mice survived after challenge with serovars 1a, 1b, 2, 5, 6, 8 (strain Goda), 11, 12, 15, 16, 21 or type N, but 10-30% mortality occurred in immunized mice challenged with each strain of serovars 4, 7, 8 (strain 911), 9, 18 or 19 and 70% mortality to serovar 10 (strain 2179). All immunized mice died after challenge with serovar 20 (strain 2553). Non-treated control mice died after challenge with all serovars and the type tested.  相似文献   

Correlation between adherence of Erysipelothrix rhusiopathiae strains of serovar 1a to tissue culture cells originated from porcine kidney and their pathogenicity in mice and swine   总被引：1，自引：0，他引：1  

T Takahashi  N Hirayama  T Sawada  Y Tamura  M Muramatsu 《Veterinary microbiology》1987,13(1):57-64

Adherence of four virulent and four avirulent strains of Erysipelothrix rhusiopathiae, serovar 1a, to porcine kidney cell lines, PK-15 and ESK cells, was examined in an in vitro system. The virulent strains adhered well to the cells (range of means, 9.95 +/- 0.87-36.01 +/- 1.10 per cell). In contrast, the avirulent strains showed negligible adherence to the cells (range of means, 0.11 +/- 0.04-1.41 +/- 0.13 per cell). Pretreatment of bacteria with heat, trypsin, or antiserum resulted in a marked decrease in adherence. Scanning electron microscopic examination revealed that the bacteria attached directly to the microvilli of cells.  相似文献   

B-cell immunoblastic lymphoma with multinucleated giant cells in a cat     

Ohshima M  Morita T  Sawada M  Shimada A  Kobayashi H  Sawashima K 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(2):189-191

A 10-year-old male mixed breed cat died after six months history of intermittent vomiting and weight loss. At necropsy, large white-colored foci were found in both kidneys, and whitish thickening of the gastric wall was present at the pyloric part of the stomach. Histopathological examination revealed that both lesions consisted of proliferation of large-sized neoplastic lymphocytes intermingled with multinucleated giant cells. Immunohistochemically, the neoplastic cells were positive for both B-cell antigen receptor complex (CD 79 alpha cy) and MHC class II, although multinucleated giant cells were negative. The present case was diagnosed as B-cell immunoblastic lymphoma with multinucleated giant cells.  相似文献   

Increased serotonergic innervation of lumbosacral motoneurons of rolling mouse Nagoya in correlation with abnormal hindlimb extension     

Koyanagi Y  Sawada K  Sakata-Haga H  Jeong YG  Fukui Y 《Anatomia, histologia, embryologia》2006,35(6):387-392

Rolling Mouse Nagoya (RMN) carries a mutation in a gene encoding for alpha(1A) subunit of P/Q-type Ca(2+) channel (Ca(v)2.1). In addition to ataxia, this mutant mouse exhibits abnormal hindlimb extension, which is characterized by a sustained excessive tone of hindlimb extensor muscles. This study aimed to clarify whether serotonergic (5-HTergic) innervation of the spinal motoneurons was altered in RMN in relation to the abnormal hindlimb extension. The density of 5-HT immunoreactive fibres in the ventral horn of lumbar and sacral regions of spinal cord was significantly greater in RMN than in controls. Retrograde wheat germ agglutinin-conjugated horseradish peroxidase (WGA-HRP) labelling combined with 5-HT immunostaining revealed that the number of 5-HT immunoreactive terminals adjoining femoris quadriceps motoneurons was about 2.5-fold greater in RMN than in controls. Furthermore, 5-HT immunostaining in the lumbar cord ventral horn was examined in three other Ca(v)2.1 mutant mice (tottering, leaner and pogo) as to whether or not they showed the abnormal hindlimb extension. Among these mutants, the increased density of 5-HT immunoreactive fibres was observed in correlation with the presence of the abnormal hindlimb extension. The results suggest an increased 5-HTergic innervation of the lumbosacral motoneurons in correlation with the abnormal hindlimb extension in RMN and other Ca(v)2.1 mutant mice. As 5-HT is known to induce the sustained membrane depolarizations without continuous excitatory synaptic inputs (plateau potentials) in spinal motoneurons, the increased 5-HTergic innervation may cause the sustained excitation of hindlimb extensor motoneurons, resulting in the abnormal hindlimb extension.  相似文献   

Significance of tumor-infiltrating immune cells in spontaneous canine mammary gland tumor: 140 cases     

Saeki K  Endo Y  Uchida K  Nishimura R  Sasaki N  Nakagawa T 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2012,74(2):227-230

The numbers of tumor infiltrating T lymphocytes, B lymphocytes and antigen presenting cells were evaluated in an immunohistochemical manner in 140 canine spontaneous mammary gland tumor (MGT) tissues. As a result, we found a statistically significant increase in the number of intratumoral T lymphocytes (23.2 ± 23.8) in the malignant MGT group (n=51) compared with the benign MGT group (14.0 ± 16.0, n=89; P<0.05). Moreover, the high T lymphocyte infiltration in the malignant group correlated with poor prognosis in multivariate analysis (P<0.05). This study indicated the relationship between increased infiltrating T lymphocytes and canine MGT malignancy.  相似文献