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Reducing the risk of blood transfusion Snyder EL; Dodd RYHematology Am Soc Hematol Educ Program 2001[]; ä (ä): 433-42There are continuing concerns over the safety of the nation's and the world's blood supply. The allogeneic blood supply is tested for antibodies to HIV1/2, HTLVI/II, hepatitis B, hepatitis C (HCV) and syphilis. Testing is also performed for donor ALT (SGOT) levels, for the presence of hepatitis B surface antigen, human immunodeficiency virus (HIV) p24 antigen and, using nucleic acid amplification testing (NAT), for HIV and HCV nucleic acids. Still, there are concerns regarding other pathogenic agents. Dr. Roger Dodd addresses a series of pathogens that are already known to be transmissible by transfusion. These include malaria, Chagas' disease, babesiosis, bacteria and some viral agents. The need for new donor screening assays to protect the integrity and purity of the blood supply must be balanced against the loss of potential donors and the cost of developing and implementing these new screening assays. This issue will be highlighted. Dr. Edward Snyder reviews the status of research into development of systems for pathogen inactivation (PI) of blood and its components. A proactive technology wherein PI reagents such as psoralen, riboflavin, dimethylmethylene blue or inactine are added to blood collection bags could assure multiple log reduction of a variety of pathogens including viruses, bacteria, protozoa and fungi without the need to initially pre-screen the blood for a specific pathogen. Such a program could also cover new pathogens as they enter the blood supply. As a key issue relates to the toxicology of these agents, Dr. Snyder provides data on a novel carcinogenicity assay that uses a heterozygous p53 knock-out mouse model. The criteria likely to be needed for PI technology to be adopted by the transfusion community are summarized.|*Transfusion Reaction[MESH]|Blood Transfusion/standards[MESH]|Blood/microbiology[MESH]|Humans[MESH]|Infection Control/methods[MESH]|Infections/microbiology/transmission[MESH]|Mass Screening[MESH]|Risk[MESH]|Sterilization/methods[MESH] |
