Invasion and multiplication ofS. Enteritidis in IL4I1-deficient macrophages. A Using gentamicin protection assay, with a single exception (clone 85 at 24 h compared with IL4I1+/+ macrophages), IL4I1+/+ and IL4I1−/− macrophages did not show any difference in killing activity of S. Enteritidis. B Association of GFP expressing S. Enteritidis with HD11 macrophages 4 h after the infection. More IL4I1−/− macrophages were associated with S. Enteritidis in comparison to IL4I1+/+ macrophages. Asterisks—significantly different from the wild type IL4I1+/+ macrophages. Data both in A and B originate from a single assay.