HTLV-1 tax sequence recognized by LAMP primers. HTLV-1 genome sequence corresponding to LAMP primers designed based on the ATK strain (GenBank J02029, which belongs in Table 1; aB), were aligned with representative sequences from other HTLV-1 genotypes: 1aA_LA, Cosmopolitan Transcontinental, Latin American cluster; 1aA_ME, Cosmopolitan Transcontinental, Middle East cluster; 1aD, North Africa; 1b, Africa; and 1c, Melanesia. The nucleotide positions are related to the ATK strain (indicated by arrows) and the regions for primer hybridization are highlighted in boxes: green: F3/B3; blue: F2/B2; yellow: LF/LB; gray: F1c/B1c.