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. 1990 Oct-Dec;49(4):297-313.

Characterization of colonization factor antigen CFA/I from an enterotoxigenic Escherichia coli strain (0128:H12)

V F Dima  1 , A Petrovici, S V Dima
Affiliations
  • PMID: 1983732

Characterization of colonization factor antigen CFA/I from an enterotoxigenic Escherichia coli strain (0128:H12)

V F Dima et al. Arch Roum Pathol Exp Microbiol. 1990 Oct-Dec.

Abstract

CFA/I antigen was isolated and purified from E. coli, mutant 279 B-1-14, serotype 0128:H12, and had the following biochemical and biological features: a) amino-acid content was similar to that of purified antigen prepared from strain H10407; b) latex particles sensitization with purified CFA/I antigen produced bovine and human erythrocytes group A/II hemagglutination in carbohydrates presence; c) purified anti-CFA/I specific antibodies agglutinated CFA/I-positive enterotoxigenic E. coli strains; d) 3H-leucine-labelled CFA/I antigen adhered to rabbits intestinal mucosa at significant values; e) intestinal mucosa pretreating with purified CFA/I antigen, followed by 3H-leucine labelled enterotoxigenic bacteria infection, had a least 3 local effects: 1) intestinal mucosa protection against parental enterotoxigenic bacteria; 2) inhibition of CFA/I-positive bacteria adherence to intestinal mucosa; 3) release of approximately 96% intraluminally inoculated bacteria.

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