Identification of enteropathogenic and enterohaemorrhagic Escherichia coli strains by immunoserological detection of intimin.

作者: M.A. Menezes , L.B. Rocha , P.C.M. Koga , I. Fernandes , J.M. Nara

DOI: 10.1111/J.1365-2672.2009.04484.X

关键词: Monoclonal antibodyEnteropathogenic Escherichia coliEscherichia coliAntiserumSerotypePolyclonal antibodiesBiologyIntiminEnterobacteriaceaeMicrobiology

摘要: Aims:  To evaluate the sensitivity and specificity of polyclonal monoclonal antibodies (Mabs) against intimin in detection enteropathogenic enterohaemorrhagic Escherichia coli isolates using immunoblotting. Methods Results:  Polyclonal Mabs intimin-conserved region were raised, their reactivities compared E. coli (EPEC) (EHEC) immunoblotting analysis. In comparison with rat antiserum, rabbit anti-intimin IgG-enriched fraction had a stronger recognition pattern to wide spectrum types different EPEC EHEC serotypes. On other hand, murine IgG2b specific intimin, dissociation constant 1·3 × 10−8 mol l−1, failed some these isolates. Conclusion:  All employed showed 100% specificity, not reacting any eae-negative isolates. The range was according antisera, 97% for fraction, followed by 92% 78% antisera Mab. Significance Impact Study:  analysis is useful tool diagnoses.

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