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김성재 ( Sung Jea Kim ),양돈식 ( Don Sik Yang ),한정희 ( Jeong Hee Han ) 한국동물위생학회 2012 韓國家畜衛生學會誌 Vol.35 No.2
A 7-year-old, castrated male dachshund dog with tumor of the spleen portion was referred to the Kangwon National University. The tumor removed surgically and tumor size was 6∼7 cm. Histopathologically, this neoplasm was the presence of perivascular whorls of fusiform cells. The cells also arranged in interlacing bundles or storiform patterns. And this neoplasm consisted of spindle cells that often formed distinct whorls around a central capillary. Immunohistochemical analysis revealed multifocally immunoreactivity for α-smooth muscle actin, whereas not immunoreactive for desmin, S-100, von Willebrand factor. On the base of the histological and immunohistochemical results, this neoplasm was diagnosed as a canine hemangiopericytoma.
이유자돈의 실험적 enterotoxigenic Escherichia coli K88 감염에 의한 설사증에 대한 박테리오파지의 예방과 치료에 대한 효능 평가
김성재 ( Sung Jae Kim ),김진동 ( Jin Dong Kim ),양시용 ( Si Yong Yang ),김남희 ( Nam Hee Kim ),이창희 ( Chang Hee Lee ),양돈식 ( Don Sik Yang ),한정희 ( Jeong Hee Han ) 한국가축위생학회 2011 韓國家畜衛生學會誌 Vol.34 No.4
Colibacillosis in pigs remain a major swine industry bruden worldwide. Although some progress has been made in treating collibacillosis in pigs by using biosecurity and antimicrobials, it still remain a considerable problem. The use of host-specific bateriophages as a biocontrol is one possible alternative. The purpose of this study was to evaluate the effect of bacteriophage against enterotoxigenic Escherichia coli (ETEC) K88 infection in piglets. Twenty-eight piglets were randomly divided into four groups and each group was allocated with 7 pigs. Group B, C and D were inoculated with 5 ml of ETEC K88 (1×108 CFU/ml) per head of piglet via oral. Group C and D were fed with bacteriophages (Group C, 1.0×106 PFU/g; Group D, 1.0×108 PFU/g; CJ CheilJedang Corp., Korea) orally as treatment. In piglets administrated bacteriophages and challenged with ETEC K88 (Group C and D), Clinical signs and the growth performance were improved and antibody titers were maintained low level compared with piglets challenged with ETEC K88 (Group B, P<0.05). Group B were shown high pH in the alimentary tracts compared with other piglets (P<0.05). In quantitative analysis by real-time PCR, the results of Group C and D were lower than those Group B in faecal and intestinal samples (P<0.05). Severe villus atrophy and crypt hyperplasia were observed in Group B consequently V/C ratio increased, compared with other piglets. These results indicate that feeding with bacteriophage has effect to prevent ETEC K88 infection in piglets and suggest that use of bacteriophage can be considered a valid antibiotic alternative.
김남희 ( Nam Hee Kim ),황원무 ( Weon Moo Hwang ),이정구 ( Jung Goo Lee ),이성모 ( Sung Mo Lee ),양돈식 ( Don Sik Yang ),이창희 ( Chang Hee Lee ),김성재 ( Sung Jae Kim ),한정희 ( Jeong Hee Han ) 한국가축위생학회 2011 韓國家畜衛生學會誌 Vol.34 No.4
The aims of this study were to assess the lung lesions and to compare gross observations with histopathological findings in the lungs of slaughter pigs. During August of 2010 through July of 2011, the 1,200 lung samples were randomly collected from slaughtered pigs in Korea. We examined prevalence of lung lesions and classified the lung lesion according to the severity of lung lesions. For the comparison of gross lesions with histopathological findings, BALT hyperplasia was also examined. Among the tested samples, 1,100 (91.7%) had pneumonic lung lesions. In the seasonal prevalence of pneumonic lung lesions, spring was the highest followed by winter, summer and autumn, respectively. The mean pneumonic score (mean±SD) was 21.37±17.87 and the highest gross lesion according to stages was 11∼20% (27.2%, 326/1,200). The prevalence of pleuritis was 7.0% and the highest prevalence was determined in summer. In severity, the lungs collected in this study were frequently in chronic stage (36.4%, 437/1,200), and it was shown that BALT hyperplasia was more extensive in chronic lesion. In this study, the prevalence of pneumonic lung lesions showed a high side and appeared particularly high in the spring. Severity of lung lesion was the most prevalent chronic lesions which were consistent with histopathologic findings.
인천지역 도축돈에서 돼지호흡기질병복합감염증의 육안적 폐병변과 원인체에 관한 연구
이창희 ( Chang Hee Lee ),황원무 ( Weon Moo Hwang ),이정구 ( Jung Goo Lee ),이성모 ( Sung Mo Lee ),김성재 ( Sung Jae Kim ),김남희 ( Nam Hee Kim ),양돈식 ( Don Sik Yang ),한정희 ( Jeong Hee Han ) 한국가축위생학회 2011 韓國家畜衛生學會誌 Vol.34 No.4
The purpose of this study was to investigate association with gross lesions and causative pathogens of porcine respiratory disease complex (PRDC) including porcine circovirus type 2 (PCV2), porcine reproductive and respiratory syndrome virus (PRRSV), swine influenza virus (SIV), Mycoplasma hyopneumoniae (MH), Pasteurella multocida (PM), Actinobacillus pleuropneumoniae (APP), Haemophilus parasuis (HP) in slaughtered pigs. A total of 1,200 lung samples were collected randomly from slaughtered pigs in Korea during August of 2010 through July of 2011. The gross lesions were classified according to the six stages (0, 1∼ 10, 11∼20, 21∼30, 31∼40 and ≥41, unit=%) and 48 samples from each stage were selected to detect viral and bacterial pathogens. The results according to the six stages were 100 (8.3%), 259 (21.6%), 326 (27.2%), 213 (17.8%), 144 (12.0%) and 158 (13.2%) cases, respectively. Prevalence of pneumonia according to season was 87.0∼96.7% and the highest prevalence was in spring. In detection of pathogens by PCR, 53 samples were not detected any causative pathogens of PRDC. PCV2, PRRSV, SIV, MH, PM, APP serotype 2, APP serotype 5 and HP were positive in 45.5%, 12.5%, 10.4%, 60.1%, 1.7%, 13.9%, 12.2% and 15.6%, respectively. In co-infection, PCV2-MH was the most detected causative pathogens of PRDC. The detection rate of PCV2 and PRRSV was the highest in spring, of SIV, MH and HP was in winter. The detection rate of APP-2 and APP-5 had no seasonal prevalence. The more severe gross lesions increased, the higher the detection rate showed.