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하용공,윤석민,정병탁,박남용,이봉주,정치영,기혜영,배성열,Ha, Yong-kong,Yoon, Seok-min,Jung, Byung-tack,Park, Nam-yong,Lee, Bong-ju,Chung, Chi-young,Kee, Hye-young,Bae, Seong-yeol 대한수의학회 1991 大韓獸醫學會誌 Vol.31 No.4
Encephalomyocarditis(EMC) virus was isolated from the mummified and stillborn pigs at a swine farm in Chonnam Province, experienced with EMC infection over the period Oct.~Dec. of 1989. In addition some cultural, serological properties of the isolates and experimental infections in the piglets were studied. The results obtained were as follows; 1. Two EMC virus strains with HA titers and CPE similar to EMC-ATCC were established in a baby hamster kidney (BHK)-21 cell line by inoculating homogenates of brain and heart of the 19 mummified or stillborn pigs and designated $K_3$ and $K_{11}$. 2. At the second BHK-21 cell line passage of the initial isolates CPE appeared after incubation for 16~18 hours, while at the fourth and fifth passage the highest titer of HA was recorded, titer of HA using rat and guinea pig erythrocytes. 3. One pig inoculated with the isolate $K_3$ showed dyspnea as clinical signs and died at the 10 days after inoculation at necropsy white necrotic foci were observed from the dead animal heart. 4. Although all the rest surviving pigs showed increases in antibody titer and body temperature of $40^{\circ}C$ above for the initial 2~4 days followed by the return to normal, there were no gross lesions when the animals were sacrificed at the 2 weeks after inoculation.
돼지 Rotavirus의 역가 , 중화항체가 측정 및 Virus분리 방법 개량에 관한 연구
권혁진,윤석민,하용공,조성수,윤지병 대한바이러스학회 1991 Journal of Bacteriology and Virology Vol.21 No.2
New methods for porcine rotavirus titration, serum neutralization, and virus isolation from fecal samples were developed using swine testicle cell line (STL) grown in the maintenance medium containing pancreatin. The improved method was easy to perform and end points of the rusults were clear. The practical period of time was shortened 4 to 6 days using improved method for porcine rotavirus titration, serum neutralization test, and virus isolation from fecal samples. It was found that there were only minor differences in porcine rotavirus titers and serum neutralization antibody titers tested by conventional and improved methods. Fifteen porcine rotaviruses were isolated from 41 fecal samples of piglet suspected with rotavirus infection. The isolates showed specific cytopathic effect of rotavirus infection in STL cells and infectivity titers ranged from 10 -10 TCID 50/ml.
END법을 이용한 돼지콜레라바이러스 및 이에 대한 중화항체가 측정법 개량에 대한 시험
권혁진,윤석민,하용공,조성수,김교종,윤지병,Kwon Hyock-Jin,Yoon Seok-Min,Ha Rung-Kong,Cho Sung-Soo,Kim Kgo-Jong,Yoon Ji-Byung 대한수의사회 1991 대한수의사회지 Vol.27 No.12
The END method for titration of hog cholera virus and its serum neutralizing antibody was improved using ST cells grown and kept in modified media. ST cells were grown in Eagles media containing 0.5$\%$ lactalbumin hydrolysate, 10$\%$</TEX
박남용,조경오,조성수,하용공,Park Nam-young,Cho Kyung-oh,Cho Seoung-su,Ha Yong-kong 대한수의사회 1993 대한수의사회지 Vol.29 No.6
Attempts to isolate porcine epidemic diarrhea virus(PEDV) were made by inoculating feces homogenates into Vero cells cultures with trypsin. Cytopathic effects(CPE), such as vacuolation, formation of syncytia, and fusion of cells, were detected even at fir
박남용,정치영,이창영,기혜영,배성열,이봉주,하용공,윤석민,정병탁,김동성,Park, Nam-yong,Chung, Chi-young,Ri, Chang-yeong,Kee, Hye-young,Bae, Seong-yeol,Lee, Bong-ju,Ha, Yong-kong,Yoon, Seog-min,Jung, Byung-tack,Kim, Dong-sung 대한수의학회 1990 大韓獸醫學會誌 Vol.30 No.4
Encephalomyocarditis virus infection in pigs, characterized by severe reproductive failure in sows and sudden death in less than 7 day-old-piglets, a period of several months from October to December of 1989, in Korea was occurred. The most outstanding gross lesions at necropsy were found in the heart which were consisted of pale, yellow brown necrotic foci of varying size in myocardium. In some cases, pulmonary edema and liver congestion were observed. Histopathology of the heart revealed the interstitial myocarditis, endocarditis and epicarditis with lymphocytic, plasmacytic and macrophage cell infiltration and, in some cases, calcification of the necrotic myocardial muscle fibers. In some cases of brain, the perivascular cuffing and glial nodules were observed. In the liver and the lacrimal gland varying degrees of multifocal necrosis were seen. The virus was isolated from the heart and the brain in a stillborn piglet and a mummified fetus. This outbreak represents the first case of encephalomyocarditis virus infection of pigs in Korea.
이환자돈으로부터 오제스키병 바이러스 분리와 생물학적 성상
전무형,조성환,안수환,박성국,윤석민,하용공,Jun Moo-Hyung,Cho Sung-Whan,An Soo-Hwan,Park Seong-Kuk,Yoon Seog-Min,Ha Yong-Kong 대한수의사회 1988 대한수의사회지 Vol.24 No.3
A swine farm located in Namyangju, Kyunggi-do was damaged by increased loss due to stillbirth, abortion and high mortality of suckling pig during October to December 1987. Three piglets of the farm, that were diagnosed clinico-pathologically to be affecte
국내에서 분리한 encephalomyocarditis virus의 성상
김원용,마점술,김철중,강신영,최재윤,하용공,Kim, Won-yong,Mah, Jum-sool,Kim, Chul-joong,Kang, Shien-young,Choi, Jae-yoon,Ha, Yong-kong 대한수의학회 1992 大韓獸醫學會誌 Vol.32 No.4
We have investigated the characteristics of encephalomyocarditis(EMC) virus isolated in Korea. The CPE, buoyant density, polypeptide profile and the size of RNA of EMC virus were examined. The granulation, pyknosis and necrosis were observed from 30 to 48 hour's post inoculation of the virus into baby hamster kidney and lung cells. The buoyant density was 1.30 and $1.35g/m{\ell}$. Three different polypeptides, 26Kd, 32Kd, and 34Kd in size, were observed and the size of viral RNA was 7.7Kb.