Viruses other than the hepatitis viruses have also been implicated as a causative agent of AA [1, 5] which include parvovirus B19 [19, 30, 31] , Cytomegalovirus, Epstein bar virus [19, 31, 32] , Echovirus 3 [33] , GB virus-C [34] , Transfusion Transmitted virus (TTV) [35] , SEN virus and non-A-E hepatitis virus (unknown viruses) [7] .