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Trends in the seroprevalence of HTLV-1 in Japanese blood donors in Nagasaki Prefecture, 2000-2006.


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Title: Trends in the seroprevalence of HTLV-1 in Japanese blood donors in Nagasaki Prefecture, 2000-2006.
Authors: Iwanaga, Masako / Chiyoda, Shin / Kusaba, Eisuke / Kamihira, Shimeru
Issue Date: Sep-2009
Publisher: Japanese Society of Hematology / 日本血液学会
Citation: International journal of hematology, 90(2), pp.186-190; 2009
Abstract: Human T cell leukemia virus type-1 (HTLV-1) is the established cause of adult T cell leukemia/lymphoma. Monitoring time trends in HTLV-1 seroprevalence in blood donors is important to assess the safety of the blood supply in the viral endemic area. We analyzed changes in HTLV-1 seroprevalence in 48415 first-time blood donors who donated blood from 2000 to 2006 in Nagasaki prefecture, an endemic area in Japan. The donors were divided into 10-year birth cohorts: before 1950, 1951-1960, 1961-1970, 1971-1980, and 1981-1990. Among the first-time blood donors, 622 were tested positive for HTLV-1 [overall seroprevalence: 1.28%, (95% CI 1.19-1.39)]. Seroprevalence was significantly high in the birth cohort of before 1950 (6.22%) and declined with birth-year. The time trend of the birth-cohort-specific seroprevalence showed almost no change within each birth cohort, except for the birth cohort of 1981-1990 that showed a significantly declining trend (P for trend = 0.006). Among the birth cohort of 1981-1990, the seroprevalence was stable among those born during 1981-1986 (0.66-0.83%), but was lower among those born during 1987-1990 (0-0.38%). Detail analyses showed that HTLV-1 seroprevalence among blood donors clearly declined in those born after 1987.
Keywords: Birth cohort analysis / Blood donors / HTLV-1 / Seroprevalence
URI: http://hdl.handle.net/10069/22502
ISSN: 09255710
DOI: 10.1007/s12185-009-0366-6
PubMed ID: 19548067
Rights: © The Japanese Society of Hematology 2009 / The original publication is available at www.springerlink.com
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/22502

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