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Cytopathic activity of E. histolytica HK-9 (2 × 105) and HM-1 (105) axenically and monoxenically cultivated with E. coli (Ec) O55 or 346 for 1 month. After 1 h of interaction, the monolayer destruction was determined as described in Materials and Methods. The data represent the means and standard deviations of three independent experiments.
