The characteristics of 11 strains of Stx1-producing and Stx2-non-producing STEC O103:H2 were analyzed to investigate the differences in virulence in a single serotype of Shiga toxin (Stx)-producing Escherichia coli (STEC). Differences in the cell-adhesion activity to Caco-2 cells were observed among the strains. The activity of the one strain, isolated from a patient with hemolytic uremic syndrome was 4-20-fold higher than those of the other strains. Although the strains with high cell-adhesion activity showed high expressions of eae, espB, espD, and tir in the locus of enterocyte effacement related with cell-adhesion, those were not specific for this strain. In addition, the Stx1 production level of the strain was not particularly high. It was indicated that the high adhesion activity might be a potential factor to associate serious symptom.
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Michigan State Univ, Coll Vet Med, E Lansing, MI 48824 USAMichigan State Univ, Coll Vet Med, E Lansing, MI 48824 USA
Tseng, Marion
Fratamico, Pina M.
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Agr Res Serv, Eastern Reg Res Ctr, USDA, Wyndmoor, PA USAMichigan State Univ, Coll Vet Med, E Lansing, MI 48824 USA
Fratamico, Pina M.
Bagi, Lori
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Agr Res Serv, Eastern Reg Res Ctr, USDA, Wyndmoor, PA USAMichigan State Univ, Coll Vet Med, E Lansing, MI 48824 USA
Bagi, Lori
Delannoy, Sabine
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Anses French Agcy Food Environm & Occupat Hlth &, Food Safety Lab, Maisons Alfort, FranceMichigan State Univ, Coll Vet Med, E Lansing, MI 48824 USA
Delannoy, Sabine
Fach, Patrick
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Anses French Agcy Food Environm & Occupat Hlth &, Food Safety Lab, Maisons Alfort, FranceMichigan State Univ, Coll Vet Med, E Lansing, MI 48824 USA
Fach, Patrick
Manning, Shannon D.
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Michigan State Univ, Dept Microbiol & Mol Genet, E Lansing, MI 48824 USAMichigan State Univ, Coll Vet Med, E Lansing, MI 48824 USA
Manning, Shannon D.
Funka, Julie A.
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Michigan State Univ, Coll Vet Med, E Lansing, MI 48824 USAMichigan State Univ, Coll Vet Med, E Lansing, MI 48824 USA