1. The objectives of this work were (1) to assess the ability of Lactobacillus casei Shirota to bind aflatoxin B1 (AFB1) by fluorescent monoclonal antibody staining, (2) to evaluate the AFB1-bacteria interaction by atomic force microscopy, and (3) to determine its effect on intestinal absorption through detection of AFB1-Lys adducts used as biological markers to a 3-week aflatoxin exposure in a murine model.