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Reemergence of porcine epidemic diarrhea virus on Jeju Island
2014
Lee, S.H., Kyungpook National University, Daegu, Republic of Korea | Ko, D.H., Hanbat Swine Veterinary Service, Jeju, Republic of Korea | Kwak, S.K., Hanbat Swine Veterinary Service, Jeju, Republic of Korea | Lim, C.H., Hanbat Swine Veterinary Service, Jeju, Republic of Korea | Moon, S.U., Veterinary Research Institute, Jeju Special Self-Governing Province, Jeju, Republic of Korea | Lee, D.S., Jeju National University, Jeju, Republic of Korea | Lee, C.H., Kyungpook National University, Daegu, Republic of Korea
Porcine epidemic diarrhea virus (PEDV) strains responsible for recent outbreaks in the United States have been occurring in Mainland Korea since late 2013. Over the past 10 years, PEDV outbreaks have not been reported on Jeju Island. However, in late March of 2014, PEDV re-emerged on Jeju Island and was found to be genetically identical to PEDV strains currently circulating in Mainland Korea. The present study was conducted to provide a better understanding of the epidemiology of PEDV and more effective preventive measures against PED.
显示更多 [+] 显示较少 [-]Antimicrobial resistance and frequency of Bla∧TEM in Escherichia coli isolated from non-diarrheic and diarrheic piglets
2012
Byun, J.W., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Kim, H.Y., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Jung, B.Y., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Bae, Y.C., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Lee, W.K., Chungbuk National University, Cheongju, Republic of Korea
Antimicrobial resistance is one of the most concerns in pig industry. Escherichia (E.) coli have been used for the indicator to monitor the antimicrobial resistance. In this study, 321 E. coli from diarrheic and non-diarrheic piglets were tested for antimicrobial resistance and frequency of Bla∧TEM. In non-diarrheic piglets, they were resistant to oxytetracycline (93%), streptomycin (92%) and sulfadiazine (90%) but susceptible to ceftiofur (99%), colistin (97%), and enrofloxacin (82%). The isolates from diarrheic piglets were resistant to enrofloxacin (72.9%), ceftiofur (17.6%), and colistin (11.3%), whereas the resistance was 1%, 18% and 3% in case of non-diarrheic piglets, respectively. The resistance for amoxicillin/clavulanic acid (54.1%) and ceftiofur (22%) was high in isolates from post-weaning piglets. The resistance for colistin was 15.2% in nursery piglets. Seventy-three percent of isolates from diarrheic piglets showed high multidrug resistance profile (more than 13 antimicrobials) compared to those from non-diarrheic pigs in which 71% of isolates showed moderate multidrug resistance profile (7 to 12 antimicrobials). The frequency of Bla∧TEM in E. coli from non-diarrheic and diarrheic piglets was 57% and 69%, respectively. The results might provide the basic knowledge to establish the strategies for treatment and reduce antibiotic resistance of E. coli in piglets.
显示更多 [+] 显示较少 [-]Prevalence for persistent infection with bovine viral diarrhea virus in Korean native calves
2007
Bae, Y.C. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea), E-mail: baeyc@nvrqs.go.kr | Kim, H.Y. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Park, J.W. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Yoon, S.S. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Woo, G.H. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Lee, O.S. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Kang, M.I. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea)
Bovine viral diarrhea (BVD) is very important disease in cattle industry with a worldwide distribution. Detection and elimination of persistently infected calves with bovine viral diarrhea virus (BVDV) was valuable strategy for BVD eradication because those calves were main source for transmission. We surveyed persistent infection with BVDV by reverse transcription polymerase chain reaction (RT-PCR) and immunohistochemistry (IHC) using whole blood and skin. Five hundred thirty nine Korean native calves were tested. Four calves (0.7%) were positive for BVDV antigen for both tests.
显示更多 [+] 显示较少 [-]Paratuberculosis in mouflon (ovis musimon) : A case report
2006
Bae, Y.C. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea), E-mail: baeyc@nvrqs.go.kr | Kim, H.Y. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Kim, H.J. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Yoon, S.S. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Park, J.W. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Jean, Y.H. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea) | Cho, K.O. (Chonnam National University, Gwangju, Republic of Korea) | Kang, M.I. (Chonnam National University, Gwangju, Republic of Korea)
A 2-years-old female domesticated mouflon with a clinical history of chronic diarrhea and emaciation was submitted to NVRQS. Grossly, there were severe thickening of small intestine wall and enlargement of mesenteric lymph nodes. Microscopically, severe granulomatous inflammation was found in small and large intestine, mesenteric lymph nodes, spleen and liver. By Ziehl-Neelsen stain, innumerable acid-fast rod bacteria were found in the cytoplasm of epitheloid and Langhans type giant cells present in these organs.
显示更多 [+] 显示较少 [-]Effect of chitosan-oligosaccharides on hydrophobicity of pathogenic Escherichia coli
1999
Choi, H.S. | Han, H.J. | Kang, M.I. (Chonnam National University, Kwangju (Korea Republic). College of Veterinary Medicine) | Kim, H.K. | Kim, H.S. (Chonnam National University, Kwangju (Korea Republic). Biologkcal Engineering Institute)
The purpose of this study was to evaluate effect of chitosan-oligosaccharides(CHIOL) on hydrophobicity of pathogenic E coli including a field isolate from suckling piglet with diarrhea, E coli-0157:H7, and E coli-O149:K88ac. E coli field isolate appeared adhesion of 100% to n-hexadecne between 0.00125% and 0.05% CHIOL. E coli-O157:H7 occurred adhesion of 69% and 64% under the level of 0.00125% and 0.025% CHIOL, respectively. E coli-O149:K88ac showed adhesion of 100% in higher than 0.025% CHIOL. For cationic action, the adhesion of E coli isolate and E coli-O149:K88ac to n-hexadecane were inhibited at level of higher than 10mM Ca2+ but did not induce any difference among the concentrations used(p0.01). However,the adhesion of E coli-O157:H7 to n-hexadecane was inhibited at level of higher than 50mM Ca2+. In a field trial, control piglets showed average mortality of up to 58% during 3 days after the onset of diarrhea. In contrast, the prevalence of E coli-induced diarrhea in CHIOL-treated groups without mortality was dropped down to average 34% on the 1st day after the treatment of CHIOL, and average 2% on the 4th day. After then, piglets with diarrhea was not present. In conclusion, the low concentrations of CHIOL were most likely to associate with the enhancement of hydrophobicit to pathogenic E coli. Calcium inhibited the hydrophobicity of E coli by CHIOL. These results suggested that CHIOL could be played an efficient and reliable role in treating enteric colibacillosis of piglets.
显示更多 [+] 显示较少 [-]Detection of bovine viral diarrhea virus by In situ hybridization
1999
Park, N.Y. | Hong, K.K. | Chung, C.Y. | Cho, K.O. | Lee, B.J. | Park, Y.S. | Park, H.S. (Chonnam National Univerisyt, Kwangju (Korea Republic). College of Veterinary Medicine) | Kweon, C.H. (National Veterinary Research and Quarantine Service, Anyang (Korea Republic).)
Detection and distribution of bovine biral diarrhea virus(BVDV) was studied in formalin-fixed, paraffin-embedded tissues from two naturally infected cattle by in situ hybridization with a non-radioactive biotinylated probe. A 600 base pair cDNA probe from BVDV B-25 strain ws used for probe. The whole procedure of ISH to diagnose was carried out within 1~2 hours in MicroprobeTM capillary action system. The biotin-labelled probe was demonstrated after hybridization under standard conditions by the application of streptoavidin and biotinylated alkaline phosphatase. Alkaline phosphatase was visualized using a fast red TR/naphthol phosphatase and the sections were counterstained with hematoxylin. We have obtained the result of positive reactions in digestive tract(sm1.all intestine and colon) and epidermis of tongue in the state of the intract tissues. The result suggested that in situ hybridization method can be considered as a useful diagnostic technique for detection of specific nucleic acid sequences of BVDV.
显示更多 [+] 显示较少 [-]Retrospective study of porcine epidemic diarrhea in Korea by in situ hridization
1997
Park, N.Y. | Lee, S.K. (Chonnam National University, Kwangju (Korea Republic). College of Veterinary Medicine)
Detection of torovirus-like particles from calves with diarrhea
1997
Lyoo, Y.S. (RDA, National Veterinary Research Institute, RDA, Anyang (Korea Republic))
Studies on the electrophoretic analysis of serum protein in Korean native calves
1997
Kim, H.S. | Lee, J.M. | Kwon, O.D. | Park, J.H. | Park, S.Y. | Lee, S.O. (Chonbuk National University, Chonju (Korea Republic). College of Veterinary Medicine)
Characterization of canine coronaviruses isolated from the dogs with diarrhea in Korea
1994
Lee, B.H. | Jun, M.H. (Chungnam National University, Taejon (Korea Republic). College of Veterinary Medicine) | Park, J.H. | Hwang, E.K. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute) | Huh, W. (Daesung Microbiological Laboratory, Taejon (Korea Republic))