METHODS : E . histolytica infection was established in human intestinal xenografts in severe combined immunodeficient ( SCID-HU-INT ) mice .
methods : e . histolytica infection was established in human intestinal xenografts in severe combined immunodeficient ( scid-hu-int ) mice .
O O B-mono_cell I-mono_cell I-mono_cell O O O O B-other_artificial_source I-other_artificial_source I-other_artificial_source O B-other_artificial_source I-other_artificial_source I-other_artificial_source I-other_artificial_source I-other_artificial_source I-other_artificial_source I-other_artificial_source O