Fig. 1. Phylogenetic tree of HTLV1 isolates based on the 640 bp fragment of the LTR region, including four sequences from treatment-naïve HIV1-infected patients (V) in Midwestern Brazil and 18 GenBank sequences of subtypes a-d. The phylogenetic tree was constructed using the neighbor-joining method based on the Hasegawa, Kishino & Yano model and g-distribution. The number on the tree represents bootstrap values.
