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Adherence in ETEC isolates positive for the lngA gene. Quantitative adherence assay determined in CFU when HT-29 cells were infected. The classification of adherence was done according to the positive control (Enteroaggregative E. coli 042) mean (11.97 × 106 CFU/ml), grouped in three phenotypes: weakly (0.3–2.99 × 106 CFU/ml), moderately (3.0–5.98 × 106 CFU/ml), and strongly adherent (=5.99 × 106 CFU/ml). Enteroaggregative E. coli 042 shows as rhomb on gray (positive control).
