“…CAV presents tropism for T-lymphocytes, rendering the cellular immune response ineffective, especially in young chickens, by destroying CD8+ T cells (Adair et al, 1993;Adair, 2000;Brentano, 2009), disabling the protection against intracellular agents. Through a facultative intracellular infection, MG can cause a systemic infection and evade the immune response (Vogl et al, 2008;Santos et al, 2009).…”