Immediately following infection of chickens with avian influenza virus (AIV) most cells begin to express proinflammatory cytokines, including IL-1β and IL-6, and Type I IFN genes, which results in a general antiviral response through the activation of a broad range of effector molecules, including Myxovirus resistance gene I (Mx), RNA-activated protein kinase (PKR) and 2',5'-oligoadenylate synthetases (OAS) [8-10]. This evidence concerns the gene MX1 and infection.