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The seroprevalence rate of human T-lymphotropic virus (HTLV) among the Korean blood donor population was studied to determine whether screening for HTLV should be implemented. A total of 15,173 serum samples collected from June to July 2006 at five Blood Centers which are located closely to Japan geographically, where the prevalence of HTLV is known to be high, were tested. Serological screening was done by a chemiluminescence method. Samples reactive repeatedly on serological screening were confirmed further by Western blot, line immunoassay, nested polymerase chain reaction and sequencing of proviral DNA. Six samples tested reactive with the serological assay showing a reactive rate of 0.004%. Among the six samples, one sample was confirmed as HTLV-1 positive, giving a confirmed reactive rate of 0.007%. Based on the results of this study, an extended study will be conducted to evaluate whether introduction of HTLV screening is necessary in Korea.

Background: The National unrelated hematopoietic stem cell (HSC) donor program started in 1994. The Korean Red Cross (KRC) has participated in this program from the start as a recruiting organization. Results of 20 years of donor recruitment were analyzed to make suggestions to manage potential donors more effectively and improve retention rate. Methods: Statistics on registration, deregistration, and donation of potential HSC donors registered in the Korean Network for Organ Sharing (KONOS) registry from 1994 to 2013 were analyzed. For donors recruited by the KRC, gender and age distribution, and reasons for self-withdrawal were also analyzed. Results: As of 2013, a total of 265,307 potential HSC donors have been registered in the KONOS registry, among which 38.8% have been recruited by the KRC. Rate of self-withdrawal from the registry was lower for the KRC than the mean of all recruiting organizations (15.9% vs 21.8%). Reasons for withdrawal were objections by family members (34.9%), medical conditions (28.8%), change of donors' mind (21.7%), and other personal reasons (14.6%). The overall retention rate during the 20 year period for KRC was 63.7% which was higher than that of KONOS (58.1%). Conclusion: The lower self-withdrawal rate and higher retention rate of donors recruited by the KRC are the result of continuous education of donors to maintain their willingness to donate not only during recruitment but also after registration. This study will help to improve the retention rate and manage registered donors more effectively. (Korean J Blood Transfus 2016;27:285-295)

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