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Internalization of invasive S. enterica into five Acanthamoeba isolates in gentamicin protection assays. Results are presented as viable intracellular bacteria recovered 2 h after challenge, given as a percentage of the initial inoculum. Values are means from three independent experiments, each carried out in duplicate wells. Error bars, standard deviations. Ar, A. rhysodes; Ac, A. castellanii; Ac896, Acanthamoeba sp. strain Ac896.
