Table 2.
Distribution of HIV-1 subtypes across geographical regions for START dataset. All subtypes found in less than 100 samples are grouped as ‘Other’. Sequencing was not successful for 588 samples and these are shown as ‘ND’ (not determined). The bottom two rows show the Shannon–Weaver and 1—Simpson indexes of subtype diversity per region. Diversity indexes were calculated based on the distribution of subtypes A, AB, B, BC, BF, C, and CRF01_AE across geographical regions.
| Subtype | Africa | Asia | Australia | Europe and Israel | USA | Latin America | Total |
|---|---|---|---|---|---|---|---|
| A | 63 (9%) | 0 | 0 | 43 (3%) | 0 | 0 | 106 (3%) |
| AB | 43 (6%) | 19 (6%) | 0 | 44 (3%) | 2 (1%) | 2 (0%) | 110 (3%) |
| CRF01_AE | 0 | 121 (41%) | 5 (5%) | 21 (2%) | 0 | 0 | 147 (4%) |
| B | 42 (6%) | 23 (8%) | 74 (78%) | 888 (66%) | 338 (85%) | 594 (65%) | 1,959 (52%) |
| BC | 85 (12%) | 8 (3%) | 1 (1%) | 22 (2%) | 1 (0%) | 23 (3%) | 140 (4%) |
| BF | 0 | 0 | 0 | 26 (2%) | 1 (0%) | 132 (14%) | 159 (4%) |
| C | 129 (18%) | 40 (13%) | 3 (3%) | 40 (3%) | 2 (1%) | 15 (2%) | 229 (6%) |
| Other | 189 (26%) | 19 (6%) | 0 | 109 (8%) | 5 (1%) | 25 (3%) | 347 (9%) |
| ND | 180 (25%) | 68 (23%) | 12 (13%) | 160 (12%) | 48 (12%) | 120 (13%) | 588 (16%) |
| Total | 731 | 298 | 95 | 1,353 | 397 | 911 | 3,785 |
| Shannon–Weaver Index | 1.52 | 1.22 | 0.44 | 0.79 | 0.11 | 0.70 | − |
| 1—Simpson index | 0.76 | 0.61 | 0.20 | 0.32 | 0.03 | 0.37 | − |