High incidence of the gullet worm, Gongylonema pulchrum, in a squirrel monkey colony in a zoological garden in Japan     

Sato H  Une Y  Takada M 《Veterinary parasitology》2005,127(2):131-137

Histological examination revealed the gullet worm (Gongylonema pulchrum) embedded in the lingual mucosa of two of four dead Bolivian squirrel monkeys (Saimiri boliviensis) from a zoological garden in Kyushu, Japan. The zoo had kept the monkeys as a colony of approximately 80-100 individuals in a moated, open ground since 1981. To assess the incidence of G. pulchrum infection in this colony, lingual scraping with disposable plastic sticks was conducted in February during 2 consecutive years (2003 and 2004). The oval, thick-shelled egg containing a larva was found in 15 of 27 arbitrarily-chosen adult monkeys (55.5%) in 2003, and 27 of 106 monkeys (25.5%) in 2004. Infection of other zoo-kept mammals with G. pulchrum was not assessed. Since the gullet worm infects a variety of mammals including primates as natural definitive hosts, and dung beetles and cockroaches as intermediate hosts, the zoological garden may provide an ideal environment for the parasite. Zoo veterinarians should be aware of this disease in kept mammals, and should consider in the case of primates, monthly or bimonthly prophylactic anthelmintic treatment.  相似文献   

Carcinogenicity of biphenyl in mice by two years feeding     

Umeda Y  Aiso S  Yamazaki K  Ohnishi M  Arito H  Nagano K  Yamamoto S  Matsushima T 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2005,67(4):417-424

Carcinogenicity and chronic toxicity of biphenyl was examined in the male and female BDF1 mice fed a diet containing biphenyl at 667, 2,000 or 6,000 ppm for 2 years. There was no difference in survival rate between any biphenyl-containing diet-fed group of either sex and the respective control. Body weights of the males and females fed 6,000 ppm diet were significantly lower than the respective control. Incidences of hepatocellular carcinomas and hepatocellular adenomas in the females fed diets containing biphenyl were significantly increased in a dose-related manner, and exceeded a range of the historical control data in the Japan Bioassay Research Center. Incidences of basophilic cell foci in the liver were increased in the females fed 2,000 and 6,000 ppm diets. There was no increase in tumor or tumor-related lesion in the males fed diets containing biphenyl. Chronic toxicity of biphenyl was characterized by increased incidences of urothelial desquamation in the renal pelvis in males and females and mineralization in the inner stripe of renal outer medulla in females, as well as changes in serum levels of BUN, ALP and some electrolytes in males and females. In conclusion, the 2-year oral administration of biphenyl-containing diets induced pre-neoplastic and neoplastic lesions in the liver of females and non-neoplastic lesions in the kidney of males and females. Causative factors for the biphenyl-induced hepatocarcinogenicity were discussed in light of our published finding of peroxisome proliferation.  相似文献   

Perirenal pyelocaliceal diverticulum in an infant cat     

Tsujimoto S  Okuda K  Okuda H  Une Y  Nomura Y  Shirota K 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2005,67(3):329-331

A 3-month-old female tortoise-shell cat showing azotemia died with a marked swollen abdomen. Necropsy revealed a huge perirenal cyst (8.5 x 6.0 x 4.5 cm) on the ventral aspect of the right kidney. The cyst was filled with the pellucid yellow fluid with a smell of urine. The lumen was connected with irregularly dilated renal pelvis by a narrow channel passing through the renal parenchyma. The cyst was lined by epithelial cells and its wall was consisted of collagen fibers and smooth muscle cells as that of the renal pelvis and ureter. Renal parenchyma adjacent to the channel showed interstitial infiltration of the lymphoid cells. The cyst was a diverticulum of the renal pelvis due to an impaired development.  相似文献   

Virulence characteristics of Yersinia pseudotuberculosis isolated from breeding monkeys in Japan     

Iwata T  Une Y  Okatani AT  Kato Y  Nakadai A  Lee K  Watanabe M  Taniguchi T  Elhelaly AE  Hirota Y  Hayashidani H 《Veterinary microbiology》2008,129(3-4):404-409

Between April 2001 and 2007, 18 Yersinia pseudotuberculosis outbreaks occurred in breeding monkeys at 12 zoological gardens in Japan, and 28 monkeys of 8 species died. A total of 18 Y. pseudotuberculosis strains from the dead monkeys, comprising one strain per outbreak, were examined for serotype and the presence of the virulence genes virF, inv, ypm (ypmA, ypmB and ypmC) and irp2. Of the 18 Y. pseudotuberculosis strains, 7 (38.9%) were serotype 4b, 7 (38.9%) were serotype 1b, and there was one each of serotypes 2b, 3, 6 and 7. All the 18 strains examined harbored virF and inv. Sixteen (88.9%) strains, including the strain of serotype 7, harbored ypmA. However, no strain harbored ypmB, ypmC and irp2.

This study demonstrated that among other pathogenic factors, almost all the Y. pseudotuberculosis isolated from the outbreaks had the ypm gene encoding the superantigenic toxin, YPM. As most of the monkeys who died in those outbreaks originated from South America and other regions, where the presence of the ypm gene have not been reported, YPM might be the cause, or at least the most important factor for, the high mortality of the breeding monkeys infected by Y. pseudotuberculosis in Japan. This is also the first report of a fatal case due to Y. pseudotuberculosis serotype 7 infection in the world.  相似文献   

Intracranial meningioma with polygonal granular cell appearance in a Chihuahua     

Takeuchi Y  Ohnishi Y  Matsunaga S  Nakayama H  Uetsuka K 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2008,70(5):529-532

A menigioma with polygonal granular cell proliferation in an 11-year and 8-month-old male Chihuahua is described. The tumor was observed under the dura matter of the right cerebrum. Microscopically, the tumor consisted of solid growth foci of small- or large- sized polygonal cells, with pale-stained nuclei, prominent nucleoli, and fine granular to foamy eosinophilic cytoplasm. Some of the proliferating cells contained variable amounts of cytoplasmic PAS-positive granules. Immunohistochemical analysis revealed that neoplastic cells were positive for vimentin and S-100 protein. Ultrastructurally, the neoplastic cells contained vesicular structures with a few small round-shaped bodies in the cytoplasm. We diagnosed the case as canine meningioma with granular cell appearance.  相似文献   

Multi-voxel magnetic resonance spectroscopy of cerebral metabolites in healthy dogs at 1.5 Tesla     

Sooyoung Choi  Yumi Song  Kija Lee  Youngwon Lee  Hojung Choi 《Journal of veterinary science (Suw?n-si, Korea)》2016,17(2):217-224

This study was conducted to measure the difference in levels of cerebral metabolites in the right and left hemispheres, gray (GM) and white matter (WM), imaging planes, and anatomical regions of healthy dogs to establish normal variations. Eight male Beagle dogs (1 to 4 years of age; mean age, 2 years) with no evidence of neurologic disease were studied. Using the multi-voxel technique on a 1.5 Tesla magnetic resonance imaging scanner, metabolite values (N-acetyl aspartate [NAA], choline [Cho], creatine [Cr]) were obtained from the frontoparietal WM, parietal GM, temporal GM, occipital GM, thalamus, cerebellum, mid-brain, and pons. There was no significant difference in levels of these metabolites between the right and left in any locations or between the GM and WM in the cerebral hemispheres. However, there were significant differences in metabolite ratios within imaging planes. The NAA/Cr was lower in the cerebellum than other regions and the thalamus had a higher Cho/Cr and lower NAA/Cho ratio than in other regions. The spectral and metabolic values will provide a useful internal reference for clinical practice and research involving multi-voxel magnetic resonance spectroscopy. Measurement of metabolite values in the transverse plane is recommended for comparing levels of regional metabolites.  相似文献   

Identification of <Emphasis Type="Italic">Mycobacterium</Emphasis> species and <Emphasis Type="Italic">Rhodococcus equi</Emphasis> in peccary lymph nodes     

Amanda Bonalume Cordeiro de Morais  Carmen Alicia Daza Bolaños  Ana Carolina Alves  Cássia Yumi Ikuta  Gustavo Henrique Batista Lara  Marcos Bryan Heinemann  Rogério Giuffrida  Fernando Paganini Listoni  Mateus de Souza Ribeiro Mioni  Rodrigo Garcia Motta  Shinji Takai  Márcio Garcia Ribeiro 《Tropical animal health and production》2018,50(6):1319-1326

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Spontaneous Harderian Gland Adenocarcinoma in a Female F344 Rat: A Case Report     

Hideki Senoh  Taku Katagiri  Kenji Takanobu  Yumi Umeda  Shigetoshi Aiso  Shoji Fukushima 《Journal of toxicologic pathology》2014,27(2):139-142

Harderian gland tumors are extremely rare in female F344 rats. An expansive enlarging lesion of the Harderian gland with compression, distortion and invasion of the surrounding muscle was found in a 110-week-old female F344/DuCrj rat, which was diagnosed as a Harderian gland adenocarcinoma. Epithelial growth patterns such as glandular, lobular, papillary and duct forming patterns were exhibited in most areas of the tumor. The tumor cells were pleomorphic and atypical. In one part of the tumor, poorly differentiated areas were found. This case was observed in the middle dose group of a carcinogenicity study of diphenylamine, which was not carcinogenic, we determine to be this case was a spontaneous tumor.  相似文献   

Zygomycotic Mediastinal Lymphadenitis in Beef Cattle with Ruminal Tympany     

Maki NISHIMURA  Yumi TOYOTA  Yoshikazu ISHIDA  Hideki NAKAYA  Kyohko KAMEYAMA  Yoshifumi NISHIKAWA  Kazuro MIYAHARA  Hisashi INOKUMA  Hidefumi FURUOKA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2014,76(1):123-127

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Extranodal Lymphoma with Peripheral Nervous System Involvement in a Dog     

Hiroshi UENO  Kenjiro MIYOSHI  Sho FUKUI  Yumi KONDO  Kazuya MATSUDA  Tsuyoshi UCHIDE 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2014,76(5):723-727

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