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강상철,김정희,김병준,송중기,이해영,신성호,김현일,김재훈,Kang, Sang Chul,Kim, Jung Hee,Kim, Byungjun,Song, Joong Ki,Lee, Hae-yeong,Shin, Seongho,Kim, Hyunil,Kim, Jae-Hoon 대한수의학회 2020 大韓獸醫學會誌 Vol.60 No.4
Three neonatal pigs from the same litter in a domestic farm were born with skin lesions. Grossly, multiple well-circumscribed, round papules distributed over the skin of the three piglets. Two piglets were submitted for a diagnosis of skin disease. Microscopically, epidermal hyperplasia with ballooning degeneration of stratum spinosum keratinocytes was observed. Some keratinocytes contained eosinophilic intracytoplasmic inclusions and a central nuclear vacuole and chromatin margination. Swinepox (SWP) virus was detected by polymerase chain reaction and nucleotide sequencing, and Staphylococcus hyicus was isolated in skin lesions. Based on the gross findings and laboratory results, these piglets were diagnosed with congenital SWP with a secondary staphylococcal infection.
제주도 내 돼지 살모넬라증의 발생 양상 분석 및 병리학적 연구
양형석,강상철,김애란,정병열,김재훈,Yang, Hyoung-Seok,Kang, Sang-Chul,Kim, Ae-Ran,Jung, Byeong-Yeal,Kim, Jae-Hoon 대한수의학회 2017 大韓獸醫學會誌 Vol.57 No.4
Salmonella (S.) Typhimurium is highly contagious, and its infection may rapidly spread within pig populations of herd. According to the survey (1,191 pigs) from 2003 to 2012, 155 pigs (13.0%) were diagnosed as salmonellosis in Jeju. Major porcine salmonellosis cases (88.4%) were concentrated in 4- to 12-week-old weaned pigs, but 6 pigs (3.9%) under 4 weeks old were also diagnosed. Based on the histopathologic examinations, ulcerative enteritis (63.9%) in the large intestine and/or paratyphoid nodules formation (57.4%) in the liver were most prevalent lesions in porcine salmonellosis. Single infection of S. Typhimurium and mixed infection with more than 2 pathogens were detected in 38 (24.5%) and 117 (75.5%) in pigs, respectively. Co-infections of Porcine reproductive and respiratory syndrome virus and Porcine circovirus type 2 were very common in porcine salmonellosis in Jeju and detected in 84 (54.2%) and 59 (38.1%) pigs, respectively. Based on the serotyping tests using 41 bacterial isolates, S. Typhimurium and S. Rissen were confirmed in 39 (95.1%) and 2 (4.9%) cases, respectively.
양형석,강상철,배종희,김재훈,Yang, Hyoung-Seok,Kang, Sang-Chul,Bae, Jong-Hee,Kim, Jae-Hoon 대한수의학회 2006 大韓獸醫學會誌 Vol.46 No.3
A 7-month-old brown pig with a discoid and pedunculate mass measuring $14.0{\times}12.5{\times}2.5cm$ on the skin of the right shoulder was noted at the slaughter house in Jeju. The surface of mass approximately $7{\times}4cm$ was interfaced with skin. The color of mass with firm consistency was mainly black and partially white on cut surface. Histopathologically, numerous unencapsulated endocrine-like cellular nodules of epithelioid cell type with abundant intracytoplasmic black pigment, melanin, were occupied in dermis and subcutis. Most of nodules in deep dermis were surrounded by lightly pigmented spindle cells and loose fibrous tissues. Mitotic figures were infrequently observed. The overlying epidermis was hyperplastic due to the down-growth of rete peg. Based on the gross and histopathologic findings, this case was diagnosed as cutaneous melanoma. In our best knowledge, this is the first case of swine cutaneous melanoma in Korea.
더러브렛 말의 Streptococcus equi subsp. zooepidemicus 감염에 의한 복막염
조정준,강상철,양형석,양재혁,손원근,배종희,김재훈,Cho, Jung-Joon,Kang, Sang-Chul,Yang, Hyoung-Seok,Yang, Jae-Hyuk,Son, Won-Geun,Bae, Jong-Hee,Kim, Jae-Hoon 대한수의학회 2007 大韓獸醫學會誌 Vol.47 No.3
Fibrinopurulent peritonitis and abdominal abscesses associated with Streptococcus (S.) equi subsp. zooepidemicus is reported in a 1-year-old female thoroughbred horse. The horse died after showing 5-day history of the cold, severe abdominal distention, abdominal breathing, hyperthermia, anorexia, and loss of intestinal sound. At necropsy, several liters of turbid yellowish green fluid were seen in the abdominal cavity. Yellowish creamy and fibrinous or bloody materials were presented on the serosa of various abdominal organs that were intensively adhered with each other. Spleen and mesenteric lymph node were remarkably enlarged. Affected lobes of the lung showed severe congestion, hemorrhage and doughy consistency. Histologically, the lung showed hemorrhagic pneumonia with diffuse congestion and edema. Severe diffuse fibrinopurulent peritonitis with Gram-positive bacterial cocci and adjacent fibrosis were showed in the serosa of various abdominal organs such as liver, spleen, stomach, and intestine. And multifocal abscess pouches were presented in the granulation tissue of abdominal viscera. S. equi subsp. zooepidemicus was isolated from the peritoneal swab, abdominal organs, and lung. Hematogenous dissemination of bacteria from hemorrhagic pneumonia is proposed as the route of infection in this case.
강화정,강상철,정지열,조숙희,노인순,이주명,정종태,김정훈,안민찬,배종희,김재훈,Kang, Hwa-Jung,Kang, Sang-Chul,Jung, Ji-Youl,Jo, Suk-Hee,Roh, In-Soon,Lee, Joo-Myung,Cheong, Jongtae,Kim, Jung-Hun,An, Min-Chan,Bae, Jong-Hee,Kim, Jae-Hoon 대한수의학회 2008 大韓獸醫學會誌 Vol.48 No.3
A 10-year-old female Yorkshire terrier with the clinical signs of nasal swelling, epistaxis and nasal discharge was presented to the Veterinary Teaching Hospital in the Cheju National University. Abnormal nasal mass was detected in physical examination and radiographic findings. After surgical excision, the sample of nasal mass was referred to Pathology Department of Veterinary Medicine. Grossly, the mass was soft, friable, and $2.5{\times}4cm$ cm in size. Histopathologically, the mass was composed of mediumsized non-keratinizing columnar to polyhedral cells arranged in anastomosing ribbon and large nest. It has complex in-folding of thick epithelial layers separated by fibrovascular septa. Tumor cells showed characteristic palisading arrangement of columnar cells, and perpendicularly distributed to the basement membrane. The cells had pale basophilic cytoplasm, oval nucleus and one or more nucleoli, and indistinct cellular border. Many tumor cell emboli were presented in lymphatics. Immunohistochemistry revealed that tumor cells were cytokeratin (CK) 19 and CK clone MNF116 positive and but CK7 and CK high molecular weight negative. Based on the gross, histopathologic, and immunohistochemical findings, the mass was diagnosed as transitional carcinoma in nasal cavity. In our best knowledge, this is the first report of transitional carcinoma originated from transitional zone of canine nasal cavity in Korea.
김형석,강상철,정지열,김현섭,김대용,김재훈,Kim, Hyeong-Seok,Kang, Sang-Chul,Jung, Ji-YouI,Kim, Hyun-Sup,Kim, Dae-Yong,Kim, Jae-Hoon 대한수의학회 2008 大韓獸醫學會誌 Vol.48 No.3
A two-year-old mixed breed sow was requested to the Veterinary Pathology Laboratory of Cheju National University with a clinical signs of severe abdominal pain and sudden death. Grossly, there was severe hemorrhage in abdominal cavity. Most of internal parenchymas and subcutaneous muscle showed severe pale discoloration. Both ovaries were enlarged with oval to round protruding multilobular masses and dark red in color. And they were firm and contained multiple small cysts in their cut surface. Histopathologically, numerous neoplastic granulosa cells had spherical-to-oval, hyperchromatic nuclei and scant eosinophilic cytoplasms were distributed with follicular pattern in ovarian masses. And the typical Call-Exner bodies, distinctive microcavityies, were observed in the center of small neoplastic follicles. Based on the gross and histopathologic findings, this case was diagnosed as granulosa cell tumor. In our best knowledge, this is believed to be the first report of granulosa cell tumor in a sow in Korea.
금은화(Flos lonicerae) 추출물의 Fischer 344/N 랫드를 이용한 90일간 반복 경구투여 독성시험
한충택,장호송,강상철,길기현,공광한,김도형,안태환,배진숙,고현규,한명규,김학수,허현숙,박은미,송시환,김갑호,박찬구,이현걸,Han, Zhong-Ze,Zhang, Hu-Song,Kang, Sang-Chul,Gil, Ki-Hyun,Kong, Kwang-Han,Kim, Do-Hyung,Ahn, Tae-Hwan,Bae, Jin-Sook,Go, Hyeon-Kyu,Ha 대한수의학회 2008 大韓獸醫學會誌 Vol.48 No.4
This study was performed to evaluate repeated-dose oral toxicities of Flos lonicerae extract in Fischer 344/n rats. Flos lonicerae was administered orally to rats at dose levels of 0, 37, 111, 333, 1,000 and 2,000 mg/kg/day. Each group consisted of 10 rats of each gender. The Flos lonicerae extract was given once a day, 5 times a week, for 90 day repeatedly. This study was conducted in accordance with the Protocol of Korea National Toxicology Program and The Standards of Toxicity Study for Medicinal Products. In the present study, there were no toxicologically significant changes in mortality, clinical signs, body weight gains, ophthalmoscopy, urine analysis, hematology, serum biochemistry, necropsy findings, organ weights, histopathology, estrus cycle and sperm examination of all animals treated with Flos lonicerae extract. These results suggest that the oral no observed adverse-effect level of the test item, Flos lonicerae extract, in rats is higher than 2,000 mg/kg/day in both genders. The target organs were not established.
김현주,양형석,강상철,김재훈,Kim, Hyeon-Ju,Yang, Hyoung-Seok,Kang, Sang Chul,Kim, Jae-Hoon 대한수의학회 2021 大韓獸醫學會誌 Vol.61 No.4
From April 2014 to September 2015, 153 piglets from 52 farms in Jeju were diagnosed with porcine epidemic diarrhea (PED). The major PED cases were focused on suckling piglets (144 piglets, 94.1%), particularly in 1-7-day-old piglets. Histopathologically, severe villous atrophy was observed in the small intestine, especially in the jejunum and ileum. The mean villous height to crypt depth ratios of the jejunum and ileum were 1.4:1 and 1.5:1, respectively. The major histopathologic findings of the small intestine were cytoplasmic vacuolation, cuboidalization, squamation, and exfoliation of the mucosal enterocytes in the villi. The cytoplasmic vacuolations in the enterocytes were the most prevalent lesions in the small intestine and were more severe in the ileum than in the jejunum. According to immunohistochemistry methods, the PED virus (PEDV) antigens were presented in the cytoplasms of the enterocytes, and were distributed more prevalently in the ileum than in the jejunum. PEDV antigens were also detected in the colon of 26 piglets (19.5%). Sequence comparison and phylogenetic analysis indicated that 12 PEDV had more than a 98.9% homology with each other. These PEDV strains were highly homologous with the genogroup 2 North American group.