Acute infection of encephalomyocarditis (EMC) virus in Syrian hamsters.     

Y Sugawara  K Hirasawa  M Takeda  J S Han  K Doi 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1991,53(3):463-468

One-month-old Syrian hamsters of the APA and Std: golden strains were inoculated intraperitoneally with 10(5) PFU/head of the D variant of encephalomyocarditis (EMC) virus and examined virologically and pathologically up to 7 days after inoculation. APA hamsters developed apparent hyperglycemia due to pancreatic islet cell damage while Std:golden hamsters did not. Hamsters of both strains showed clear histopathologic changes in the testis with prominent viral replication as well as in the brain, heart and exocrine pancreas. The susceptibility to EMC virus-infection was higher in males than in females and in APA than in Std: golden hamsters.  相似文献   

Amino Acid Changes in Pepper mild mottle virus Coat Protein That Affect L 3 Gene-mediated Resistance in Pepper     

Hiroyuki HAMADA  Shigeharu TAKEUCHI  Akinori KIBA  Shinya TSUDA  Yasufumi HIKICHI  Tetsuro OKUNO 《Journal of General Plant Pathology》2002,68(2):155-162

  相似文献   

Mesh-like vascular changes in copper deficiency-induced rat cardiomyopathy     

Rina Yamane  Makoto Tanaka  Nao Kikugawa  Hideki Yasui  Kenta Takei  Miwa Harada  Shinya Kaneda 《Journal of toxicologic pathology》2021,34(1):127

The pathological effects of copper deficiency (COD) are well known. However, the pathogenesis of cardiomyopathy resulting from COD remains unclear. In this study, aimed to elucidate the pathogenesis of COD-induced cardiomyopathy by examining the morphology of the cardiovascular system in copper-deficient rats using histopathology, immunohistochemistry, and scanning and transmission electron microscopy. Changes detected in the myocardium and interstitium were consistent with those reported for COD. Morphological changes included mesh-like changes in the capillary endothelial cells that appear to be a novel finding in COD-induced cardiomyopathy. These changes are hypothesized to result from abnormal vascular remodeling following damage to the basement membrane and due to the mechanical effects of myocardial contractions. Although cardiomyopathy may be associated with microcirculatory disorders arising from these lesions, further investigations are necessary to demonstrate a causal relationship between the pathogenesis of cardiomyopathy and the contribution of these lesions to disease progression.  相似文献   

Preventive effects of CIDR-based protocols on premature ovulation before timed-AI in Ovsynch in cycling beef cows     

Sakase M  Kawate N  Nakagawa C  Fukushima M  Noda M  Takeda K  Ueno S  Inaba T  Kida K  Tamada H  Sawada T 《Veterinary journal (London, England : 1997)》2007,173(3):691-693

Ovsynch is a program developed to synchronize ovulation for timed breeding. In this paper, the authors investigate whether controlled internal drug release (CIDR)-based protocols prevent premature ovulation before timed-artificial insemination (AI) when Ovsynch is started a few days before luteolysis in cycling beef cows. Nine beef cows at 16 days after oestrus were treated with (1) Ovsynch, i.e. gonadotropin releasing hormone (GnRH) analogue on day 0, prostaglandin (PG) F(2alpha) analogue on day 7 and GnRH analogue on day 9 with timed-AI on day 10, (n=3); (2) Ovsynch+CIDR (Ovsynch protocol plus a CIDR for 7 days from day 0, n=3), or (3) oestradiol benzoate (OB)+CIDR+GnRH (OB on day 0 in lieu of the first GnRH treatment, followed by the Ovsynch+CIDR protocol, n=3). In the Ovsynch group (1) plasma progesterone concentrations fell below 0.5 ng/mL earlier (day 5) than in both CIDR-treated groups (2) and (3), where this occurred on day 8. Plasma oestradiol-17beta concentrations peaked on day 8 in the Ovsynch group and on day 9 in both CIDR-treated groups. The dominant follicle ovulated on day 10 in the Ovsynch group and on day 11 in both CIDR-treated groups. Thus, both CIDR-based protocols prevented premature ovulation before timed-AI in Ovsynch when the protocol was started a few days before luteolysis. This reflects the fact that progesterone levels remained high until the beef cattle were treated with PGF(2alpha).  相似文献   

Assessment of rabbit spleen size using ultrasonography     

Takeda Y  Asaoka H  Ueno M  Jimma F  Hidaka M  Shibusawa H  Kaneda K  Saniabadi AR  Hiraishi K  Kashiwagi N 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(8):841-842

Assessment of spleen size using the ultrasonography has become a standard practice in human. However, the assessment is not established method in experimental animals. To establish the index to assess the spleen size using ultrasonography, we measured the cross-section image of rabbit spleen during endotoxin shock. The image of the cross-section was appeared as triangle, and the height of the triangular image was defined as the spleen index. This spleen index showed strong correlation with the spleen weight. In conclusion, this method is suitable for observation of changes in rabbit spleen size and may reduce the number of rabbit in the longitudinal studies.  相似文献   

A reverse transcriptase-polymerase chain reaction assay for detecting Highlands J virus     

Whitehouse CA  Guibeau A  McGuire D  Takeda T  Mather TN 《Avian diseases》2001,45(3):605-611

  相似文献   

Lesions in the central nervous system of DBA/2 mice infected with the D variant of encephalomyocarditis virus (EMC-D).     

M Takeda  K Hirasawa  K Doi 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》1991,53(6):1013-1017

The central nervous system (CNS) of DBA/2 mice inoculated i.p. with the D variant of encephalomyocarditis virus (EMC-D) (10(3) PFU/head) was examined up to 28 days postinoculation (28 DPI). The virus titer of CNS reached a maximum level at 4 DPI, and infectious viruses became undetectable by 28 DPI. Histopathologically, degeneration of neurons with virus antigens was observed in St. pyramidale hippocampi, Nuc. amigdaloideus corticalis and St. granulosum cerebelli of the brain and in Cornu ventrale of the thoracic to lumbar spinal cord at 6 DPI. In addition, in the spinal cord, demyelination was found in Funiculus ventralis and Funiculus lateralis at 6 DPI and it progressed to form spongiosis at 10 DPI. In correspondence with these virological and histopathological findings, hind limb paralysis developed in some mice at 6 DPI, and its incidence increased markedly to about 60% at 10 DPI.  相似文献   

Use of DNA array to screen blastocyst genes potentially involved in the process of murine implantation     

Qin J  Takahashi Y  Imai M  Yamamoto S  Takakura K  Noda Y  Imakawa K 《The Journal of reproduction and development》2003,49(6):473-484

  相似文献   

Nonulcerative keratouveitis as a manifestation of Leptospiral infection in a horse   总被引：1，自引：1，他引：0  

Wada S  Yoshinari M  Katayama Y  Anzai T  Wada R  Akuzawa M 《Veterinary ophthalmology》2003,6(3):191-195

A 2-year-old Thoroughbred filly presented with ocular pain and epiphora of the left eye. The pupil was miotic and the cornea edematous near the ventro-temporal limbus, but did not retain any fluorescein. The topical antibiotics and atropine and diclofenac, and systemic flunixin meglumine and antibiotic therapy did not resolve the condition. A pink and fleshy infiltrate developed near the limbus indicating nonulcerative keratouveitis. The anterior uveitis deteriorated as manifested by the presence of dyscoria, hypopyon, and organized fibrin in the anterior chamber. Ocular signs were improved by topical and subconjunctival corticosteroids, but repeatedly deteriorated as the frequency of medication was reduced. The horse was seropositive to three serovars of Leptospira interrogans. The animal was diagnosed as blind on day 91 by the absence of pupillary light and menace reflexes, and donated for histopathologic diagnosis. The corneal opacity was histologically fibrotic and infiltrated predominantly by lymphocytes with Descemet's membrane partially disrupted by macrophages. The choroid was infiltrated by lymphocytes, eosinophils and basophils, and was positive to IgG and C3. There were filamentous or spiral structures positive to Warthin-Starry stain in the renal cortex. There was also polymerase chain reaction amplification of the leptospiral gene in the kidney. From these findings nonulcerative keratouveitis was believed to be caused by systemic infection with Leptospira.  相似文献   

Increase of Th1 type cytokine mRNA expression in peripheral blood lymphocytes of calves experimentally infected with Cryptosporidium parvum     

Takeda K  Omata Y  Koyama T  Ohtani M  Kobayashi Y  Furuoka H  Matsui T  Maeda R  Saito A 《Veterinary parasitology》2003,113(3-4):327-331

  相似文献