“…Only a few EAEC fimbrial types have been genetically characterized, and certainly, the best studied are the AA fimbriae (AAFs) I, II, and III (Nataro et al, 1992;Czeczulin et al, 1997;Bernier et al, 2002). AAF I, II, and III are encoded in high-molecular-weight plasmids and are necessary for the expression of AA, in the prototype strains 17-2, 042, and 55989, respectively (Nataro et al, 1992;Elias et al, 1999;Bernier et al, 2002). Another fimbrial structure has been described in the atypical EAEC strain C1096, which adhesion is mediated by a type IV pili, encoded by genes (operon pilLMNOPQRSTUV), and located in a plasmid of the IncI1 incompatibility group (Cobeljic et al, 1996;Dudley et al, 2006a).…”