The present study quantified cells that express the mRNA of representative cytokines of type 1 and type 2 immune responses, IFN-γ, respectively, IL-13 in cecum, liver and spleen samples for elucidating cytokine expression patterns that could be attributed to vaccination or infection of turkeys and chickens with clonal cultures of H. meleagridis. This evidence concerns the gene IL13 and infection.