To investigate how bacterial infection impacts placental efflux transport potential, we investigated the expression of the of Abca1, Abcb1a, Abcb1b, Abcb4, Abcc2, Abcc5, Abcf2, Abcg1 and Abcg2 mRNAs in the mouse placenta at GD15.5 or GD18.5 following LPS challenge (4 h). This evidence concerns the gene ABCG1 and bacterial infectious disease.