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Blanco, J. et al.

Toxic and adhesive properties of Escherichia coli strains belonging to classic enteropathogenic serogroups.

Twenty-three strains belonging to classic enteropathogenic Escherichia coli (EPEC) serogroups were investigated for the production of heat-labile (LT) and heat-stable (STa) enterotoxins, verotoxins (VT), cytotoxic necrotizing factors CNF1 and CNF2, alpha-haemolysin (Hly), necrosis and modification of permeability in rabbit skin, lethal activity to mice, mannose-resistant (MRHA) and mannose-sensitive (MSHA) haemagglutination, relative cell surface hydrophobicity and the expression of P fimbriae. Of 23 EPEC strains, 7 (30%) belonging to serotypes O18ac: H7 (Hly+), O20: H26 (lethal), O26: H- (Hly+), O44: H18 (Hly+), O55: H- (CNF2+, necrotic and lethal), O119: H27 (VT+ and Hly+) and O142: H6 (lethal) produced toxic factors. Seven (30%) of 23 EPEC strains were MRHA+, 17 (74%) were MSHA+ and only 2 possessed high hydrophobicity. Two strains belonging to serotypes O18ac: H7 and O44: H18 that showed MRHA type IVa were fimbriated when grown on CFA medium.[1]

References

Toxic and adhesive properties of Escherichia coli strains belonging to classic enteropathogenic serogroups. Blanco, J., Blanco, J.E., Blanco, M., González, E.A., Garabal, J.I., Alonso, M.P. Acta Microbiol. Hung. (1993) [Pubmed]

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