“…Some other viruses that play crucial roles in cancer progression are simian vacuolating virus 40, BK virus, JC virus, human endogenous retroviruses, human mammary tumor virus, Torque teno virus ( McLaughlin-Drubin and Munger, 2008 ). Marek’s disease virus or MDV (also known as Gallid herpesvirus 2) is considered as an α-herpesvirus, which causes oncogenic disease in domestic fowl (chickens) by producing T cell lymphosarcoma (lymphoma), visceral tumors and other clinical signs such as nerve lesions and immunosuppression ( Rong et al, 2014 ). Gallid herpesvirus-2 (GaHV-2) genome integrates into the host genome by homologous recombination and induces transformation of latently infected cells, by modulating the expression of several viral and cellular genes ( Gennart et al, 2015 ).…”