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윤충근,정호경,선우선영,류영수 한국임상수의학회 2010 한국임상수의학회지 Vol.27 No.4
Bovine leukemia virus (BLV) is a delta-retrovirus which causes chronic lymphocytosis in cattle. BLV infections have been divided into two groups such as enzootic bovine leukosis (EBL) and sporadic bovine leukosis (SBL) according to the clinical symptoms in infected cattle. The conventional detection method of BLV was hematological procedure which is determining lymphocytosis in the suspected animals. Recently several sensitive methods were developed to detect antibody to BLV and nucleic acid of the BLV from infected cattle. In this study we have compared the difference of positive rates between agar gel immunodiffusion (AGID) and enzyme linked immunosorbent assay (ELISA) which are using for BLV antibody detection methods. The positive detection rate of ELISA test was 7.4% greater than the positive rate of AGID. The discrepancy of the positive rate between ELISA and AGID were showed in the group of age over one year old to under three year old group. The result from each test agreed very well in the group of over 5 year old cattles. The serological test is very useful method to select the infected cattle for the eradication or control of the disease in the infected herd. But it has a limit by interference of the maternal antibody from the cow of under 6 month old. This study shows that 16.2% of these ages group showed BLV gene positive by polymerase chain reaction (PCR) method. The result suggests that ELISA test need to be used with PCR to clarify misinterpretation of positive animals by antibody response due to the natural infection from maternally derived antibody in calves of under 6 months old.
윤충근,임연수,류영수,Youn, Choong-Keun,Lim, Yeon-Soo,Lyoo, Young S. 대한수의학회 2010 大韓獸醫學會誌 Vol.50 No.3
Fifty young calves, about five to six months old purchased from nation-wide were investigated with the prevelance of neutralizing antibody (Ab) of infectious bovine rhinotracheitis virus (IBRV), parainfluenza 3 virus ($PI_{3}V$), bovine viral diarrhea virus (BVDV) and bovine respiratory syncytial virus (BRSV). The positive detection ratio of neutralizing Ab against IBRV was only 3% and two of positive samples showed low antibody titer (below 2). Ab against BRSV showed 48% of positive ratio and among 24 positive samples, antibody titer of 23 samples were below 3. But in the case of BVDV, 68% of samples were positive and 23 samples appeared to possess high antibody titer, above 4 and the antibody titer of five samples were above 8. The highest positive result came from $PI_{3}V$. The positive ratio in the samples investigated in this study was 72%, but the antibody titer of positive samples were generally below 3 (77.8% in positive samples).
표준항혈청 생산 및 한우 ( Bos taurus coreanae ) 의 혈액형에 관한 연구
신형두,윤충근,신언익,양일석,권종국 ( H . D . Shin,C . K . Yoon,U . I . Shin,I . S . Yang,J . K . Kwun ) 한국축산학회 1993 한국축산학회지 Vol.35 No.4
These studies were carried out to produce standard antisera for the serological blood typing of cattle and to clarify the genetic characteristics of Korean Native Cattle. For the serological blood typing, thirty-three standard antisera(reagents) were produced by iso-immunizations and absorptions with two hundreds animals. Seven hundreds and forty-two Korean Native Cattle were bloodtyped by those antisera. Also the phenogroups (alleles) in each blood group system were investigated. Two hundreds animals were bloodtyped with standard antisera which introduced from bovine bloodtyping laboratory, Saskatoon, Canada and used far isoimmuniz anon to produce immunesera. Thirty-two reagents(A1, A2 and Z` of A system; B, C, I1, Y2, A`1, A`2, B`, D`, E`2, E`3, I` and J` of B system; C1, C2, X1, X2, R1, R2, W and L` of C system; F and V of I` system; J of J system; S, H`, U1, U`1, U` and U$quot; of S system: Z of Z system) were produced by iso-immnunizations and absorptions. And J reagent was seperated from natural serum. In ISAG international comparison test in 1991, the specificities of these thirty-three antisera were compared with those of other laboratory. In A blood system, four kinds of phenogroups were appeared. The gene frequency of A1Z` phenogroup, which has been characteristically reported in Indian cattle breed, was 0.206. In B blood system, thirty-five kinds of phenogroups were appeared and showed similar gene frequencies in each other. In C blood system, sixteen kinds of pheuogroups were appeared. The gene frequency of X2 phenogroup was the highest(0.300). In F blood system, three kinds of alleles were appeared. The gene frequency of $quot;-$quot; allele which has been characteristically reported in Indian cattle breed, was 0.213. In S blood system, ten kinds of phenogroups were appeared. The gene frequency of $quot;-$quot; and G$quot; phenogroups were relatively high. In J and Z blood system, the gene frequency of J and Z alleles were 0.432 and 0.600.
도장돈에 있어서 돼지천공개선충 (Sarcoptes scabiei var. suis)의 감염률 조사
이방환,임정택,윤충근,Lee Bang-Whan,Lim Jung- Taek,Yoon Chung-Kun 대한수의사회 1984 대한수의사회지 Vol.20 No.1
Seasonal infestation rate of Sarcoptes scabiei var suis were surveyed in 560 slaughter pigs of Kwangju area by means of microscopical detection of eggs and mites from ear scrapings, supplementing morphological observation of the mites. The results were su
남선미(Nam Sunmi),윤충근(Yoon Choonggeun),이소현(Lee Sohyun),이지수(Lee Jisoo) 한국디자인사학회 2023 Extra Archive: 디자인사연구 Vol.- No.6
“Alternative Museum” (altmuseum.org) explores the limitations and possibilities of descriptive writing when depicting images, focusing on case studies of operational practices. This project originated from questioning the conventional use of alternative text (alt text) typically left empty when constructing websites. It expands into discussions on how we perceive objects beyond the online space of the World Wide Web and experimental writing.
김두,유영수,유한상,윤충근,Kim, Doo,Lyoo, Young-soo,Lyoo, Han-sang,Yoon, Chung-keun 대한수의학회 1990 大韓獸醫學會誌 Vol.30 No.2
This study was conducted to examine the enteropathogens and clinical aspects of diarrhea of the 211 Korean native calves during the suckling period. The experimental results were summerized as follows: 1. The 206 Korean native calves (97.6%) were affected with diarrhea during the suckling period. 2. Of 156 diarrheal feces tested, Rotavirus were detected from 108(69.2%) feces of $K^+99$ E coli were detected from 23(14.7%) feces and Eimeria spp were detected from 33(21.2%) feces. But Salmonella spp and Cryptosporidium spp were not detected. 3. Rotavirus were detected from 2 to 84 days of life, $K^+99$ E coli were detected from 5 to 54 days and Eimeria spp were detected from 33 to 84 days of life. 4. Physical appearances of the diarrheal feces were not affected specifically according to the enteropathogens, but were affected by the severity of diarrhea and the diets.