Figure 2. . Maximum-likelihood tree of hantaviruses showing the position of the 4 sequences of Tigray hantavirus (boldface; GenBank accession nos. JQ956484–JQ956487) found in kidney samples of Ethiopian white-footed mice (Stenocephalemys albipes). The tree was constructed on the basis of analysis of partial sequences of the RNA polymerase gene; phylogeny was estimated by using the maximum-likelihood method with the general time reversible + I + Γ (4 rate categories) substitution model to account for rate heterogeneity across sites as implemented in the PhyML program (8). Numbers represent percentage bootstrap support (1,000 replicates). Underlining indicates hantaviruses found in Africa. Scale bar indicates nucleotide substitutions per site. GenBank accession numbers of the virus strains: AB620030, NC_003468, EU929078, EF619961, JF276228, EF540771, EF543525, EF397003, NC_005235, AB620033, JN037851, FJ170809, FJ170812, AB620108, EF641807, FJ593501, GQ306150, AF005729, EU788002, AB620102, FJ593498, FJ593497, EF646763, NC_005225, GU566021, FJ809772, HM015221, AJ410618, DQ268652, JQ082305, EU424336, NC_005238, AM998806, NC_005217, DQ056292, EF050454, JN116261, EU001330, AJ005637, JQ287716.