Ans-CEpstein Barr Virus??? Viruses associated with blood transfusion:Hepatitis C virus:Hepatitis G virus:Hepatitis B virusHIV type IHTLV Type ICytomegalovirusParvovirus B-19HGVA recently discovered and identified non A-E hepatitis virus has been designated the name Hepatitis G virus (HGV) which is a member of Flaviviridae family.HGV is distinct from hepatitis C virus (HCV) and the newly discovered GBV-A and GBV-B agents.The structure of the HGV genome resembles that of HCV.HGV replicates in peripheral blood cells I while replication in liver cells has not been observed till date. It does not appear to cause liver disease.Epidemiological data indicates that virus is prevalent throughout the world and has clearly reestablished transmission modes which are: -Blood and Blood productsSexual transmissionEBV can also be transmitted by blood transfusion.- EBV os present in the transfused WBC.The leucocyte associated viruses are: -CMVEBVHHV-8 (Human herpes virus type 8)HTLV-1 &HTLV-IIHIVWe are not sure of the answer.Now we should look for the virus which is least commonly transmitted.There is confusion in this too because both EBV and Parvovirus are rare with transfusion.An important point * All the viruses mentioned in the question are not routinely screened for blood transfusion.The American Red Cross performs laboratory tests for multiple infectious disease markers on every unit of donated blood.These tests includes: -Chagas diseaseHepatitis B virus (HBV)Hepatitis C virus (HCV)HIV (1,2)HTLV-ISyphilisWest Nile virus (WNV)