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Studies on pathogenicity of Escherichia coli isolated from chickens: Correlation between in vitro Congo-red binding properties and in vivo virulence in avian Escherichia coli.
1991
Woo Y.K. | Kim K.S. | Kim B.H.
Resistance to gentamicin and amikacin of gram-negative organisms isolated from horses
1989
Orsini, J.A. | Benson, C.E. | Spencer, P.A. | Van Miller, E.
Resistance of gram-negative bacteria to gentamicin has become an increasingly common problem among clinical isolates from human beings. Susceptibility of isolates from horses to gentamicin and amikacin was evaluated for the period from July, 1983 to June, 1985. All isolates of Escherichia coli, and species of Enterobacter, Klebsiella, Proteus, and Pseudomonas examined were susceptible to amikacin, except 2 of the 46 Pseudomonas isolates. In contrast, 13 to 50% of isolates were resistant to gentamicin. Escherichia coli, and Klebsiella, Proteus, and Enterobacter species isolates were highly significantly more susceptible to amikacin (P less than 0.01) than to gentamicin. Pseudomonas spp (P = 0.13) were not significantly different in susceptibility to the 2 drugs. There was significant variation among genera in their susceptibility to gentamicin (P = 0.002), primarily because of the frequency of resistance in isolates of Klebsiella spp and Proteus spp, compared with the other 3 organisms (E coli, Enterobacter spp, and Pseudomonas spp). There was no significant difference of susceptibility to amikacin among the genera studied (P = 0.06).
Mostrar más [+] Menos [-]The nucleotide sequence of the genes, fanE and fanF, of Escherichia coli K99 fimbriae
1991
Ono, E. (Hokkaido Univ., Sapporo (Japan). Faculty of Veterinary Medicine) | Lavin, M.F. | Naiki, M.
Confirmed nucleotide sequence of fanF of Escherichia coli K99 fimbriae
1993
Abe, N. (National Inst. of Health, Tokyo (Japan)) | Moriishi, K. | Saito, M. | Naiki, M.
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))
Studies on development of Escherichia coli subunit vaccine against calf diarrhea, 2; immunogenicity and protective efficacy of Escherichia coli K99 and F41 pilus vaccines in experimental animals
1986
Kim, J.M. | Yoon, Y.D. | Park, J.M. (Rural Development Administration, Anyang (Korea R.). Veterinary Research Inst.) | Kim, B.H. (Kyongbuk National Univ., Taegu (Korea R.). Dept. of Veterinary Medicine)
The oil emulsion and alhydrogel pilli vaccines were prepared from a strain (O9: K35, K99, F41) of enterotoxigenic Escherichia coli isolated from calves with diarrhea and their immunogenicity was tested in guinea-pigs, pregnant goats and cows. Serum antibody responses to K99 and F41 antigens in guinea-pigs given experimental oil and gel vaccines peaked at 4 and 6 weeks after vaccinations. At that time, the mean hemagglutination inhibition titers to K99 and F41 antigens in guinea pigs given oil vaccine were 1:25 and 1:1,218 and those given gel vaccine were 1:54 and 1:724 respectively
Mostrar más [+] Menos [-]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
Mostrar más [+] Menos [-]Studies on development of Escherichia coli subunit vaccine against calf diarrhea, 1; distribution of enterotoxigenic Escherichia coli and purification of K99 and F41 pilus antigens
1986
Kim, J.M. | Yoon, Y.D. | Park, J.M. (Rural Development Administration, Anyang (Korea R.). Veterinary Research Inst.) | Kim, B.H. (Kyongbuk National Univ., Taegu (Korea R.). Dept. of Veterinary Medicine)
The prevalence of diarrhea caused by enterotoxigenic Escherichia coli was surveyed on 445 calves in 6 farms which were located in the central part of Korea. The incidence of enterotoxigenic Escherichia coli in calves with diarrhea was investigated by detecting the K99 and F41 antigens from the isolated strains of Escherichia coli. The incidence of colibacillosis in calves was 23.3%. Of 238 strains of Escherichia coli isolated from calves with diarrhea, 73 strains (30.6%) were proved possessing the K99 antigen by mannose-resistant hemagglutination (MRHA) using horse red blood cells and 79(33.1%) possessing F41 antigens by MRHA using guinea-pig red blood cells
Mostrar más [+] Menos [-]Biochemical properties and cultural characteristics of Escherichia coli isolated from chickens
1990
Woo, Y.K. | Kim, K.S. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute) | Kim, B.H. (Kyungpook National University, Taegu (Korea Republic). College of Veterinary Medicine)