pullorum</i> infection significantly elevated (<i>p</i> < 0.05) the renal (CREA, UREA), hepatic (ALT, AST), immunological (IgG, IgM), and inflammatory (TNF-α, IL-6, SAA, CRP) parameters, as well as the expression of <i>trefoil factor 3</i>, <i>Toll-like receptor 2</i>, <i>TNF-α</i>, <i>IL-1β</i>, and <i>IL-6</i>. This evidence concerns the gene TFF3 and infection.