FTH1 and infection: None of the components of the ferritin iron storage system are affected by infection with Salmonella or Francisella as measured by determining the expression of Fth1 and Ftl1 (Figure 6A and 6B; p = 0.91 and p = 0.90 for Francisella and p = 0.88 and p = 0.78 for Salmonella).