Prevalence of human parvovirus B19 and TT virus in a group of young haemophiliacs in South Africa.Haemophilia. 2000 Mar; 6(2):93-7.H
A well recognized hazard of transfusion with blood or blood products is the acquisition of a viral infection. Parvovirus B19 and transfusion transmitted virus (TTV) are two of several non-enveloped viruses that may on rare occasions be present in coagulation factor concentrates. The prevalence of these viruses in the South African Haemophilia population has not previously been studied. Thirty-nine Haemophiliac children were investigated for evidence of parvovirus and TTV infection. 26 boys with Haemophilia A had been treated with cryoprecipitate or intermediate purity factor VIII, and 13 boys with Haemophilia B had received prothrombin complex concentrates. All the plasma products were prepared from South African donors and were virally inactivated by heat or solvent/detergent since 1992. A control group of 32 children who had not been transfused were also studied. IgG antibodies to B19 were present in 29 of the 39 patients (74%), 18/26 (69%) with Haemophilia A and 12 of the 13 (85%) with Haemophilia B. None of the patients was IgM antibody positive but two children were PCR positive for B19 DNA. Of the control children, 47% had IgG antibodies to B19, but none were IgM antibody or B19 DNA positive. TTV viral DNA was found in 10.2% of patients and in 9% of the control group. The results indicate that our locally produced plasma products are not a significant source of TTV transmitted infection but may contribute to infection by B19 parvovirus.