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Investigation on an epidemic of tuberculosis in dairy cattle farms In Jeongeup, Korea
2009
Yoon, H.C., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Moon, O.K., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Kim, Y.J., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Cho, B.J., Jeongeup Branch, Jeonbuk Institute of Livestock and Veterinary Research, Jeongeup, Republic of Korea | Lee, S.D., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea | Lee, J.W., Jeongeup Branch, Jeonbuk Institute of Livestock and Veterinary Research, Jeongeup, Republic of Korea | Lee, S.J., National Veterinary Research and Quarantine Service, Anyang, Republic of Korea
The present study describes an investigation on an epidemic of Tuberculosis (TB) which has been occurred among dairy cattle farms in Jeongeup, Jeollabuk-do since 2007. The investigation was performed in three ways as follows: 1. Collecting information about bovine TB outbreaks using investigation reports, an on-the-spot and tracing-back investigations; 2. Analyzing the outbreak pattern; 3. Establishing hypothesis and performing statistical analysis on potential risk factors. In the early 2000s, TB outbreaks were sporadically reported in beef cattle, and only a small number (1~2) of reactors was confirmed in each of outbreak farms. The number of TB outbreaks has been suddenly increased from 2007, mainly in dairy cattle farms. And these outbreaks were temporarily clustered during the period, from March 2007 to April 2009 (relative risk, RR=13.7, p less than 0.001). And two spatial clusters of which radiuses were 0.3 km (RR=6.9, p less than 0.001) and 0.9 km (RR=3.6, p less than 0.01). The analysis to find risk factors was performed on 99 dairy farms (21 outbreaks), which are located in the most seriously affected village during 2007-2009. Middleman (odds ratio, OR=47.4, p less than 0.05) and raw milk collecting system (OR=6.9, p less than 0.05) were recognized as with the highest association. Considering the fact that all the outbreak farms except one had their own manure composting tank, it might be that the manure containing pathogen was leaked from tank and transmitted to other farms by fomites such as middleman or raw milk collecting system.
显示更多 [+] 显示较少 [-]Electrocution caused by a fallen electric wire in Korean native cattles
2008
Bae, Y.C. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea), E-mail: baeyc@nvrqs.go.kr | Lee, K.H. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Yoon, S.S. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Heo, J.H. (Gyeongnam Livestock Promotion Institute South-branch, Tongyoung, Republic of Korea) | Lee, O.S. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea)
We report the electrocution of Korean native cattle by a fallen electric wire, which caused the death of thirteen animals. The owner of the cattle felt an electric shock on touching the steel pen and found a fallen 220-V wire on the roof of the barn; additionally, the roof was singed. Clinically, the animals developed spasm, difficulty breathing, and excessive salivation. Histopathologically, many visceral organs revealed severe congestion or hemorrhage, which is consistent with previous reports. This study revealed that the proper installation of electric wires on farms is essential to prevent economic loss by electrocution.
显示更多 [+] 显示较少 [-]Diagnosis of bovine tuberculosis by sing intradermal comparative tuberculin test and gamma-interferon assay
1999
Cho, Y.S. | Kim, J.M. | Jung, S.C. | Woo, S.R. | Kim,J.Y. | Ahn, J.S. (National Veterinary Research and Quarantine Service, Anyang (Korea Republic).) | Yoo, H.S. | Park, Y.H. (Seoul National University, Suwon (Korea Republic). College of Veterinary Medicine)
Since Robert Koch found tubercle bacilli in 1882, the studies on tubercle bacilli of human and animal had been carried out. Being old tuberculin(OT) introduced in 1890, the specificity of the diagnosis of tuberculosis has been improved by continual uses of heat concentrated synthetic medium(HCSM) and purified protein derivatives(PPD) tuberculin. Now, two types of tuberculin test are used worldwidly; the single intradermal test(SIT) using bovine tuberculin and the single intradermal comparative tuberculin test(SICTT) using avian and bovine tuberculins. In the SICTT, each countries have used with different combination of both avain and bovine tuberculins' titers. However, this kinds of studies have not reported in Korea. Therefore, the studies on the combination of their tuberculins' titers were performed through intradermal test of guinea pigs sensitized with either Mycobacterium bovis or M avium and were examined in 10 cattles of SIT positive reactors. Also, IFN-y assay, the latest diagnostic method of bovine tuberculosis, was experimentally applied to SIT positive reactors. For determinint the optimal titers, sensitized guinea pigs with M bovis and M avium were intradermally injected avain and bovine tuverculin. In guinea pigs sensitized with M bovis, bovine tuberculin 50 T.U. showed significant difference from all tested concentrations of avian tuberculin(p0.05). In guinea pigs sensitized with M avium, there is significantly different between bovine tuberculin and avian tuberculin by 25 T.U.(p0.01). Therefore, optimal titers of bovine and avian PPD tuberculins' titers for the SICTT in Korea were 5,000 and 2,500 tuberculin units, respectively, and the swelling differences between bobine and avian site in SIT positive reactors were above 3mm. Also, in IFN-y assay, the 9 SIT positive reactors were showed all the positive reactions.
显示更多 [+] 显示较少 [-]Development of needle guidance system and its evaluation for ultrasound-guided follicular aspiration
1999
Choi, M.C. (Seoul National University, Suwon (Korea Republic). College of Veterinary Medicine) | Lee, H.J. | Kang, T.Y. | Won, H.H. (Gyeongsang National University, Chinju (Korea Republic). College of Veterinary Medicine) | Cho, S.K. (Gyeongsang National University, Chinju (Korea Republic). College of Agriculture)
This study was carried out to develop a newly designed ovum pick-up(OPU) instrument for ultrasound-guided transvaginal follicular aspiration in cows. This new instrument consists of out- & inner-layer stainless pipes and a grip with a trigger(hand ) switch. Some gauge types of disposable needles and tubes can be attached to this inner pipe. With this instrument, while grasping an avary with one hand the other hand can handle in apiration and vacuum on/off with the least assitant's help. with this instrument the mean recovery rate of bovine follicular oocytes was 45.2%. In recovered oocytes, usable oocytes(Grade I & II) were 30.4% and this rate meant 1.4 oocytes per ovary. For 30 days after initial aspiration with this instrument, some adverse effects such as adhesion, hemorrhage, hematoma and other mass formation in/with ovaries were also examined by rectal examination, ultrasonographic and endoscopic images. Adhesion was found in one ovary 1 week after aspiration, and hemorrhagic lesion was found 1-2 days and petechia were found 3-5 days after aspiration and there was no remarkable adverse effects. It was found that this instrument could be applicable and safe for ovum pick-up in cows.
显示更多 [+] 显示较少 [-]Induction of twinning in Korean native cattle by transfer of nuclear transplanted embryos 1. Embryo cloning using ovum pick-up (OPU), electric cell fusion and in vitro culture system
1998
Hwang, W.S. | Roh, S.H. | Lee, B.C. (Seoul National University, Suwon (Korea Republic). College of Veterinary Medicine) | Shin, T.Y. (National Veterinary Research Institute, Anyang (Korea Republic))
Serologic and electropherotypic characterization of the bovine rotaviruses isolated in Korea
1998
Chung, C.W. | Chang, C.H. | Cho, J.C. | An, S.H. (National Veterinary Research Institute, RDA, Anyang (Korea Republic)) | Kang, S.Y. (Chungbuk National University, Chongju (Korea Republic). College of Veterinary Medicine) | Park, B.K. (Seoul National University, Suwon (Korea Republic). College of Veterinary Medicine)
Congenital transmission of Teileria sergenti in cattle verified by immunohistochemistry
1997
Baek, B.K. | Kim, J.H. (Chonbuk National University, Chonju (Korea Republic). College of Veterinary Medicine) | Onuma, M. (Hokkaido University, Sapporo (Japan). Faculty of Veterinary Medicine)
Morphological studies on the development of the tracheal cartilage in the Korean native cattle fetus
1997
Lee, Y.H. | Kim, I.S. | Yang, H.H. | Park, Y.K. (Chonbuk National University, Chonju (Korea Republic). College of Veterinary Medicine)
The histological studies on the development of cartilage canal in calcaneus of the Korean native cattle fetus
1997
Ahn, D.C. | Kim, I.S. | Lee, Y.H. | Park, Y.S. | Yang, H.H. | Paik, Y.K. (Chonbuk National University, Chonju (Korea Republic). College of Veterinary Medicine) | Lee, C.O. (National Veterinary Research Institute, Anyang (Korea Republic))
A survey of paratuberculosis by immunological methods in dairy and Korean native cattle
1994
Kim, J.M. | Ahn, J.S. | Woo, S.R. | Jo, D.H. | Jo, Y.S. | Park, J.M. | Yoon, Y.D. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute) | Chang, G.H. (Kangwon Veterinary Service Laboratory, Chunchon (Korea Republic). Chungbu Branch)