The infection of PT-K75 cells with B. bronchiseptica resulted in an increased level of cytokines and chemokines, which are responsible for regulating the inflammatory response to the airways, as well as the expression of the Muc1 gene, which encode for the glycoprotein mucin, which protects the mucosa of several organs from pathogens invasion, was increased. Here, MUC5AC is linked to infection.