title: Transfusion transmission of human T-lymphotropic virus types I and II: serologic and polymerase chain reaction results in recipients identified through look-back investigations.
abstract: To determine the transmissibility of human T-lymphotropic virus types I and II (HTLV-I and HTLV-II) via transfusion, persons who, from 1983 to 1989, received blood components donated by persons who subsequently tested anti-HTLV-I-positive were evaluated. It was found that 16 (30%) of 54 evaluable recipients of transfused cellular components became infected with one of the HTLVs: 8 had HTLV-I and 8 had HTLV-II. Forty percent of platelet recipients and 28 percent of red cell recipients acquired infection. The rate of transmission of HTLV-I and HTLV-II was significantly correlated with storage age of red cell units prior to transfusion: 47 percent for red cells stored < or = 14 days and 0 for red cells stored > 14 days (p < 0.01). Multiple confirmatory serologic tests performed in 46 anti-HTLV-I enzyme immunoassay-negative recipients revealed that HTLV infection could not be excluded in 3 recipients of blood components from HTLV-II-infected donors. Polymerase chain reaction established HTLV-II infection in one recipient, and the other two recipients could not be classified with respect to HTLV infection status. It appears that some HTLV-II-infected transfusion recipients will not be detected by existing HTLV-I antigen-based reagents. If it is deemed necessary to initiate or continue look-back programs to detect transfusion transmission of HTLV-II infection, it is suggested that the current testing algorithm be modified in selected cases.
authors.affiliation: American Red Cross Blood Services, Los Angeles-Orange Counties Region, California.
authors.forename: S
authors.initials: S
authors.lastname: Kleinman
authors.forename: P
authors.initials: P
authors.lastname: Swanson
authors.forename: J P
authors.initials: JP
authors.lastname: Allain
authors.forename: H
authors.initials: H
authors.lastname: Lee
mesh_terms: D017707:Erythrocyte Transfusion; D015490:HTLV-I Infections / Q000097:blood / Q000635:transmission*; D015491:HTLV-II Infections / Q000097:blood / Q000635:transmission*; D015368:Human T-lymphotropic virus 1 / Q000235:genetics / Q000302:isolation & purification*; D015367:Human T-lymphotropic virus 2 / Q000235:genetics / Q000302:isolation & purification*; D006801:Humans; D017713:Platelet Transfusion; D016133:Polymerase Chain Reaction / Q000379:methods*; D012189:Retrospective Studies; D065227:Transfusion Reaction