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Micrographs showing adhesion of E. coli strains to Caco-2 cells. (A) ETEC 31-10 (CFA/III-positive strain). (B) ETEC 31-10P (CFA/III-negative strain). (C) E. coli HB101 harboring pTT237 and pTT222. (D) E. coli HB101 harboring pMW119 and pACYC184.
