The current study was conducted to examine the number of human T-cell leukemia virus type 1 (HTLV-1) carriers and how horizontal transmission affected the prevalence of HTLV-1 carriers among pregnant Japanese women in 2019. We requested 2,214 obstetrical facilities to provide information on HTLV-1 tests for pregnant women who delivered in 2019. The estimated number of HTLV-1 carriers among pregnant Japanese women was 952. At least 10% or more of the carriers acquired HTLV-1 through horizontal transmission.

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http://dx.doi.org/10.7883/yoken.JJID.2021.097DOI Listing

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