In order to analyze which BAFF-producing cells drive B cell activation during primary Salmonella infection, we used our BAFF reporter mice (BAFF-RFP), where one Baff allele expresses the RFP protein as a measurement of BAFF expression and the other allele expresses wild type (WT) Baff [9]. This evidence concerns the gene TNFSF13B and Salmonella Infections.