Aiming to correlate the expression of innate immunity cytokines transcripts with the course of infection by S. mansoni in different mouse strains, we crossed data of the number of eggs per gram of the distal ileum or the number of adult worms recovered from the hepatic perfusion with the pro-IL-1β and TNF-α mRNA expression at weeks 7 and 12 post infection. This evidence concerns the gene IL1B and infection.