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Prevalence of pili and enterotoxins of Escherichia coli associated with diarrhea in preweaning piglets
1997
Ham, H.J. (Seoul Metropolitan Institute of Health and Environment, Seoul (Korea Republic)) | Cheon, D.S. | Chae, C.H. (Seoul National University, Seoul (Korea Republic). College 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
Mostrar más [+] Menos [-]Studies on enterotoxigenic Escherichia coli isolated from cattle
1986
Lee, G.L. | Choi, W.P. (Kyongbuk National Univ., Taegu (Korea R.). Dept. of Veterinary Medicine)
The purpose of this study was the examination for presence of K99 antigen (K99), enterotoxigenicity, 0-groups, colicin and antibiotic susceptibility among E. coli isolated from calves and cows. A total of 49 (18.7%) among 262 strains, isolated from 30 (26.5) out of 113 calves and cows, possesed K99, and thirty three of 49 K99+ strains produced ST. Of the strains of diarrheal calf origin which less than 15 days old, a high correlation was observed between enterotoxigenic ability and K99: 92.3% of the K99+ strains produced heat stable enterotoxin (ST)
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