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Effective DNA extraction method to improve detection of Mycobacterium avium subsp. paratuberculosis in bovine feces
2015
Park, H.T., Seoul National University, Seoul, Republic of Korea | Shin, M.K., Seoul National University, Seoul, Republic of Korea | Sung, K.Y., Seoul National University, Seoul, Republic of Korea | Park, H.E., Seoul National University, Seoul, Republic of Korea | Cho, Y.I., (Department of Animal Resources Development, National Institute of Animal Science, Rural Development Administration, Cheonan, Republic of Korea | Yoo, H.S., Seoul National University, Seoul, Republic of Korea
Paratuberculosis caused by Mycobacterium avium subsp. paratuberculosis (MAP) has extended latent periods of infection. Due to this property, difficulties in the detection of fecal shedder have been raised. A newly designed method for DNA extraction from fecal specimens, mGITC/SC was evaluated in terms of diagnostic efficiency. The detection limit of IS900 real-time PCR was about 50 MAP (1.5 cfu) in 250 mg of feces (6 cfu per g). Also, this DNA extraction method was faster and cheaper than that using commercial kit or other methods. Consequently, the mGITC/SC is an economical DNA extraction method that could be a useful tool for detecting MAP from fecal specimens.
Mostrar más [+] Menos [-]Establishment of a diagnostic method for porcine proliferative enteropathy using polymerase chain reaction
1999
Lym, S.K. | Lee, H.S. | Woo, S.R. | Yoon, S.S. | Moon, O.K. | Lee, Y.Y. (Ministry of Agriculture & Forestry, Anyang (Korea Republic). National Veterinry Research & Quarantine Service) | Koh, H.B. (National University Kwangju (Korea Republic). College of Betrinary Medicine)
Porcine Proliferative Ebterophthy(PPE) is an infectious enteric disease and a major cause of economic loss in swine industry due to weight loss, poor growth and sudden death in growing and finishing pigs at 6 tp 20 weeks of age. PPE has been diagnosed by clinical sighs, syndrom and lesions in the intestine in Korea. However, the diagnostic method had several problems in the detection of infected or carrier pigs. Therefore, in this study, we established the polymerase chain reaction(PCR) which ws a fast, specific and sensitive method for identification of Lawsonia intracellularis(L intracellularis). We designed and synthesized primer on the 16S rDNA and p78 gene encoding L intracellularis. Specificity of the method was confirmed by comparison of the PCR results using other enteric bacteria and the study has shown that PCR method was sensitive to detect 1ng of genomic DNA as a template. Identity of the PCR products was confirmed by comparison of pattern of restriction endonclease analysis with restriction enzyme HaeIII and PstI. Also, the PCR method was applicable to the naturally affected pigs with PPE. Based on the results from this study, the PCR method could be used as a fast and specific diagnostic tool for PPE.
Mostrar más [+] Menos [-]Detection of Mycoplasma gallisepticum using Polymerase Chain Reaction(PCR)
1999
Lee, Y.J. | Kim, K.S. | Kim, J.W. (Ministry of Agriculture and Forest, Anyang (Korea Republic). National Veterinary Research and Quarantine Service) | Tak, R.B. (Kyungpook National University, Taegu (Korea Republic). College of Veterinary Medicine)
A species-specific 760 base pair(bp) BamHI to EcoRI DNA fragment(fMG-2) of lipoprotein gene was isolated from a Mycoplasma gallisepticum (M gallisepticum) genomic library. Based on the DNA sequence data of fMG-2, a pair of 25bp primers was synthesized. When used in the polymerase chain reaction(PCR), 732bp DNA products were amplified from 6 standard strains and 10 field isolates of M gallisepticum, but not from 2 Mycoplasma synoviae and 7 other Mycoplasma species. The lower detection limit was 100fg of the genomic DNA. Identity of the PCR products was confirmed by comparison of patterns of restriction endonuclease analysis with AseI, DraI, EcoRV and SspI.
Mostrar más [+] Menos [-]Characterization of antimicrobial resistance and application of RFLP for epidemiological monitoring of thermophilic Campylobacter spp. isolated from dogs and humans in Korea
2014
Cho, H.H., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Kim, S.H., Viral Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of orea | Min, W.G., Gyeongsang National University, Jinju, Republic of Korea | Ku, B.K., Animal, Plant and Fisheries Quarantine and Inspection Agency, Anyang, Republic of Korea | Kim, J.H., Division of Enteric Bacteria Infections, Center for Infectious Disease, National Institute of Health, Seoul, Republic of Korea | Kim, Y.H., Gyeongsang National University, Jinju, Republic of Korea
An antimicrobial susceptibility test was conducted to compare the resistance rates among Campylobacter spp. isolates from dogs (n = 50) raised under diverse conditions and humans (n = 50). More than 60% of Campylobacter (C.) jejuni from dogs and humans showed resistance to nalidixic acid, enrofloxacin and ciprofloxacin. C. jejuni isolates from humans showed higher resistance to tetracycline (83.3%) and ampicillin (91.3%) than those from dogs. None of the C. jejuni or Campylobacter coli isolates from humans or dogs were resistant to erythromycin. Overall, 85% of Campylobacter spp. isolates showed a multidrug resistant phenotype. Nucleotide sequencing analysis of the gryA gene showed that 100% of NA. /CIP. olates from dogs and humans had the Thr-86. h-Ile mutation, which is associated with fluoroquinolone resistance. flaA PCR restriction fragment length polymorphism (RFLP) typing to differentiate the isolates below the species level revealed 12 different clusters out of 73 strains. The human isolates belonged to eight different RFLP clusters, while five clusters contained dog and human isolates.
Mostrar más [+] Menos [-]Paternity test in dogs by microsatellite allele analysis
1999
Chae, Y.J. | Kim, D.K. | Kim, H.N. | Lee, M.H. | Hwang, W.S. | Lee, B.C. | Youn, H.Y. | Lee, H. (Seoul National University, Suwon (Korea Republic). College of Veterinary Medicine)
Microsatellite allele analysis has been used for individual identification and paternity test. In the present study, the biological father of three puppies was determined by using microsatellite allele amplification analysis. The mother bitch of the litter was a poongsan dog. The three study dogs that could have inseminated the bitch, by being in the same residence, were a white Poosan dog, a mixed breed, and a white Jindo dog. DNA was obtained from all the relevant dogs by buccal swabbing. Four loci of tetranucleotide repeat microsatellite were PCR-amplified, and analyzed by polyacrylamicde gel electrophoresis and silver staining. The results of genotyping unambigously assigned the Poongsan dog as the biological father. There was no evidence of superfecundation. Therefore, the present study demonstrated the usefulness of microsatellite allele analysis as a simple, efficient method of paternity test in dogs.
Mostrar más [+] Menos [-]Dissemination of Borrelia burgdorferi and immunological responses after experimental infection in rabbits
1999
Kim, J.B. | Park, S.U. | Song, H.W. | Park, S.W. | Kim, Y.M. (Yonsei University, Wonju (Korea Republic). Department of Medical Technology, College of Health Science)
The visceral dissemination of Borrelia burgdorferi in New Zealand White rabbits was evaluated following intradermal inoculation of 1*10 8 spirochetes. We inoculated Borrelia burgdorferi B31, B garinii KW1 and B afzelii S13, respectively, and monitored the dissemination in the experimentally infected rabbits for 28 days. In the B burgdorferi B31-challenged group, the spirochetes were com;oetely cleared in rabbits at day 1 and visceral dissemination was not demonstrated. However, B garinii KW1 and B afzelii S13 were found to successfully disseminate in visceral organs of rabbits during the experiment period of 28 days. And experimentally infection-derived immunological responses in rabbits were identified with enzyme-linked immunosorbent assay and immunoblot analysis. Based on these results, the differences in the virulence of Lymeborrelial strains were proved in rabbit model.
Mostrar más [+] Menos [-]Analysis of genetic diversity for cattle parentage testing using microsatellite markers
Cho, G.J.;Yang, Y.J.(Korea Racing Association, Gwachon, Republic of Korea)E-mail:chogj@kra.co.kr | Lee, K.W.(Miryang National University, Miryang, Republic of Korea)
The objective of present study was to ascertain genetic diversity for cattle parentage testing. A total of 59 random cattle samples(29 Korean native cattle and 30 dairy cows) were genotyped by using 11 microsatellite loci(BM1824, BM2113, ETH10, ETH225, EH3, INRA23, SPS115, TGLA122, TGLA227, TGLA53, and TGLA126). This method consisted of multiplexing PCR procedure and showed reasonable amplification of all PCR products. Genotyping was performed with an ABI 310 genetic analyzer.
Mostrar más [+] Menos [-]Species characterization of animal by DNA hybridization
1999
Lee, M.H. | Kim, S.K. (Chungnam National University, Taejon (Korea Republic). College of Veterinary Medicine) | Jung, G.S. | Park, J.M. (National Veterinary Research & Quarantine Service, Anyang (Korea Republic).)
DNA hybridization assay using probes prepared from liver was carried out to identify species characterization of the domestic animals. Gel electrophoresis showed that the target DNA extracted from raw muscle were 1kb and uniform pattern while fragments size of heated muscle were irrgular. Hybridizatino was performed by adding 200ng/ml probe in hybridization solution and incubating for 12 hours at 68 degrees centigrade. To obtain good discrimination, applied washing buffer and washing step differently depending on the species. The probes of pig, horse and dog formed the specific hybrids with each target DNA respectively. Although cross reaction ws detected in cattle, goat and sheep but signal intensity among these species made the discrimination possible each other. Such pattern was the same in the cases of chicken, turkey and duck. The hybridization pattern of heated muscle was similar to that of raw muscle in general, but the signal intensity was inferior to that of raw muscle. Species identification between closely related animal species, hybridized using the target DNA of such closely related animal species as a blocking agent, remarkable increase of discrimination from the evident decrease of non specific reaction compared with the control group. In addition, in the admixture where certain meat was included in the beef, pork, chicken meat, we colud find whether any unjust meat was admixed or not. In this case, detection limit of certain meat in admixture was 1%.
Mostrar más [+] Menos [-]Construction of recombinant DNA clone for bovine viral diarrhea virus
1992
Yeo, S.G. (Gyongsang National University, Chinju (Korea Republic). College of Agriculture) | Cho, H.J. | Masri, S.A. (Agriculture Canada, Montreal (Canada). Animal Diseases Research Institute)
Virulence-associated plasmids of Salmonella spp, isolated from animals in Korea
1992
Choi, W.P. | Jung, S.C. (Kyungpook National University, Taegu (Korea Republic). Department of Veterinary Medicine)