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Serotype, antimicrobial susceptibility and plasmid profile of Listeria monocytogenes isolated from livestock products and product processing plants
Park, S.K.;Lee, H.J.;Kim, Y.H.;Kang, H.J.(Gyeongsang National University, Jinju, Republic of Korea)E-mail:hjkang@nongae.gsnu.ac.kr | Son, W.G.(Cheju National University, Jeju, Republic of Korea)
This study was carried out to investigate the serotype, and antimicrobial susceptibility and analyze the plasmid profile for the 145 isolates of L. monocytogenes isolated from livestock products and these product processing plants in Gyeongnam, Korea. All of L. monocytogenes strains belonged to serotype 1/2b (57.9%), 1/2a (20.0%), 4b (11.4%), 1/2c, 3b, 4c (each 2.9%) and 4d (0.7%). Serotype 1/2b, 1/2a, 4b from each source were found predominantly. Serotype 1/2b was predominantly higher than other serotype, and there was no significant difference between serotypes isolated from livestock products and product processing plants.
Показать больше [+] Меньше [-]Studies on Salmonella isolated from chicks
1994
Oh, G.H. (Kyungpook Veterinary Service Laboratory, Taegu (Korea Republic)) | Choi, W.P. (Kyungpook National University, Taegu (Korea Republic). College of Veterinary Medicine)
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)
Studies on biological characters and plasmid profiles of Escherichia coli isolated from pigs
1990
Jeong, S.K. | Choi, W.P. (Kyungpook National University, Taegu (Korea Republic). College of Veterinary Medicine) | Jeong, S.C. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute)
Biological characteristics of Escherichia coli isolated from pigeons
1990
Seo, D.K. | Choi, W.P. (Kyungpook National University, Taegu (Korea Republic). College of Veterinary Medicine) | Park, N.C. (Kyungpook Animal Health Laboratory, Taegu (Korea Republic))
Virulence-associated plasmids of Yersinia species isolated from pigs and dogs in Korea
1989
Choi, W.P. (Kyongbuk National Univ., Taegu (Korea R.). Coll. of Veterinary Medicine) | Lee, H.J. (Chungnam National Univ., Taejon (Korea R.). Coll. of Agriclture) | Jung, S.C. (Rural Development Administration, Anyang (Korea R.). Veterinary Research Institute)
Nine strains of Yersinia species isolated from pigs and dogs in Korea, comprising 5 strains of Yersinia enterocolitica, 2 strains of Y. kristensenii and each strain of Y. pseudo-tuberculosis and Y. intermedia, were examined for the presence of virulence-associated plasmids, calcium dependency and provocation of guinea pig conjunctivitis (Sereny test). Three strains of Y. enterocolitica isolated from pigs were positive in calcium dependency and harbored one plasmid of about 45 megadalton, but negative in Sereny test
Показать больше [+] Меньше [-]Distribution of antimicrobial resistances and properties of R-plasmids in E coli isolated from pigs
1994
Chung, M.E. | Yeo, S.G. (Gyeongsang National University, Chinju (Korea Republic). College of Veterinary Medicine)
Distribution of thermophilic Campylobacters in animals and transfer of drug resistance factor of isolates to related bacteria., 2; Plasmid profile and transfer of drug resistance of isolated Campylobacter
1989
Kim, Y.H. (Kyongsang National Univ., Chinju (Korea R.). Coll. of Veterinary Medicine) | Mah, J.S. (Seoul National Univ., Suwon (Korea R.). Coll. of Veterinary Medicine)
To investigate the epidemiological trait of intestinal diseases of animals caused by thermophilic Campylobacter spp., isolation of etiological agent was carried out and the profiles of plasmids and the transfer of resistance plasmid in the isolated Camplyobacter spp. were examined. A total of 110 isolates of C jejuni and C coli were subjected to the test for the presence of plasmid DNA. Of the isolates examined, 60 % of the isolates were noted to harbor plasmid DNA. Plasmid occurrence rate from pigs, chickens and cattle were 76.2 %, 61.7 % and 37.7 %, respectively. The plasmids of a large molecular weight, ranging from 36 Md to 86Md, were identified with the strains of tetracycline resistant. Transfer frequency of tetracycline resistant plasmids was higher in the case of the filter mating method than in the broth mating method by the factor of 10-1,000. Tetracycline resistant plasmids of C jejuni were transferarble to C jejuni and C coli by conjugation. In a low frequency, the transfer of tetracycline plasmid was also possible to Vibrio parahemolyticus. However, it was impossible to transfer to Streptococcus fecalis, E. coli and Vibrio cholerae. Tetracycline resistant plasmids of C jejuni were impossible to transfer to Campylobacter spp. and related bacteria by transformation
Показать больше [+] Меньше [-]Relationships between in-vitro virulence-associated characteristics, plasmid-bearing and production of outer membrane protein(OMP) of Yersinia enterocolitica isolated from pigs
1992
Park, S.G. (Seoul Metropolitan Government Inst. of Health and Environment, Seoul (Korea Republic). ) | Choi, C.S. (Chungang Univ., Seoul (Korea Republic). Coll. of Medicine) | Jeon, Y.S. (Seoul Nat'l Univ., suwon (Korea Republic). Coll. of Veterinary Medicine)
Enterotoxin production and plasmid detection of citrate utilizing Escherichia coli isolated from cattle
1988
Chae, T.C. | Choi, W.P. (Kyongbuk National Univ., Taegu (Korea R.). Coll. of Veterinary Medicine)
This paper deals with the 0 groups of citrate utilizing variants of Escherichia coli (Cit+ E. Coli) isolated from cattle, the production of colicin, hemolysin, K99 antigen, heat stable enterotoxin, and the isolation of plasmid DNA. Among 42 Cit + E. Coli, 12 strains were 020, 9 strains 08, 5 strains 045, 3 strains 0115, 1 strain 064, 1 strain 0139 and remaining strains (11) were untypable. Thirty-nine(81.3%)out of 48 Cit + E. Coli produced colicin and 13(27.0%) produced hemolysin. Of 12 cit + E. coli bearing K99 antigen, 6(50.0%) produced heat stable enterotoxin. In gel electrophoresis for the isolation of plasmid DNA, the number of plasmids varied from 1 to 7 in 10 Cit+ E. Coli. Its molecular weight ranged from 2 to 50 Mdalton, and 50 Mdalton plasmid commonly existed in all strains
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