Table 1. Regional and district prevalence of haemoglobin types in infants identified, north-western United Republic of Tanzania, February 2017–May 2018.
| Region or district | Total | No. (%) |
|||
|---|---|---|---|---|---|
| Normal | Sickle cell trait | Sickle cell disease | Variant | ||
| Region | |||||
| Geita | 2 436 | 1 918 (78.7) | 495 (20.3) | 23 (0.9) | 0 (0.00) |
| Kagera | 880 | 729 (82.8) | 146 (16.6) | 4 (0.5) | 1 (0.1) |
| Kigoma | 683 | 550 (80.5) | 123 (18.0) | 10 (1.5) | 0 (0.00) |
| Mara | 1 837 | 1 422 (77.4) | 388 (21.1) | 23 (1.3) | 4 (0.2) |
| Mwanza | 3 847 | 3 013 (78.3) | 778 (20.2) | 51 (1.3) | 5 (0.1) |
| Shinyanga | 2 800 | 2 158 (77.1) | 598 (21.4) | 41 (1.5) | 3 (0.1) |
| Simiyu | 1 126 | 855 (75.9) | 253 (22.5) | 17 (1.5) | 1 (0.1) |
| Singida | 1 141 | 906 (79.4) | 226 (19.8) | 9 (0.8) | 0 (0.00) |
| Tabora | 2 450 | 1 930 (78.8) | 485 (19.8) | 32 (1.3) | 3 (0.1) |
| Total | 17 200 | 13 481 (78.4) | 3492 (20.3) | 210 (1.2) | 17 (0.1) |
| District | |||||
| Bariadi | 261 | 206 (78.9) | 52 (19.9) | 2 (0.8) | 1 (0.4) |
| Biharamulo | 135 | 111 (82.2) | 24 (17.8) | 0 (0.0) | 0 (0.0) |
| Buhigwea | 12 | 11 (91.7) | 1 (8.3) | 0 (0.0) | 0 (0.0) |
| Bukoba | 174 | 142 (81.6) | 30 (17.2) | 1 (0.6) | 1 (0.6) |
| Bukombe | 394 | 294 (74.6) | 97 (24.6) | 3 (0.8) | 0 (0.0) |
| Bunda | 378 | 301 (79.6) | 73 (19.3) | 3 (0.8) | 1 (0.3) |
| Busega | 274 | 195 (71.2) | 77 (28.1) | 2 (0.7) | 0 (0.0) |
| Butiama | 208 | 161 (77.4) | 38 (18.3) | 9 (4.3) | 0 (0.0) |
| Chato | 514 | 399 (77.6) | 108 (21.0) | 7 (1.4) | 0 (0.0) |
| Geita | 1 156 | 929 (80.4) | 219 (18.9) | 8 (0.7) | 0 (0.0) |
| Igunga | 539 | 426 (79.0) | 107 (19.9) | 4 (0.7) | 2 (0.4) |
| Ikungi | 135 | 110 (81.5) | 23 (17.0) | 2 (1.5) | 0 (0.0) |
| Ilemela | 513 | 394 (76.8) | 110 (21.4) | 9 (1.8) | 0 (0.0) |
| Iramba | 291 | 230 (79.0) | 60 (20.6) | 1 (0.3) | 0(0.0) |
| Itilima | 152 | 120 (78.9) | 29 (19.1) | 3 (2.0) | 0 (0.0) |
| Kahama | 1 683 | 1281 (76.1) | 374 (22.2) | 25 (1.5) | 3 (0.2) |
| Kakonko | 49 | 39 (79.6) | 10 (20.4) | 0 (0.0) | 0 (0.0) |
| Kaliua | 374 | 284 (75.9) | 83 (22.2) | 7 (1.9) | 0 (0.0) |
| Karagwe | 95 | 81 (85.3) | 14 (14.7) | 0 (0.0) | 0 (0.0) |
| Kasulu | 159 | 120 (75.5) | 34 (21.4) | 5 (3.1) | 0 (0.0) |
| Kibondo | 162 | 129 (79.6) | 31 (19.1) | 2 (1.2) | 0 (0.0) |
| Kigoma | 207 | 171 (82.6) | 34 (16.4) | 2 (1.0) | 0 (0.0) |
| Kishapu | 424 | 333 (78.5) | 87 (20.5) | 4 (0.9) | 0 (0.0) |
| Kwimba | 282 | 230 (81.6) | 50 (17.7) | 2 (0.7) | 0 (0.0) |
| Kyerwa | 58 | 53 (91.4) | 5 (8.6) | 0 (0.0) | 0 (0.0) |
| Magu | 664 | 541 (81.5) | 116 (17.5) | 7 (1.1) | 0 (0.0) |
| Manyoni | 285 | 223 (78.2) | 60 (21.1) | 2 (0.7) | 0 (0.0) |
| Maswa | 216 | 167 (77.3) | 45 (20.8) | 4 (1.9) | 0 (0.0) |
| Mbogwe | 273 | 215 (78.8) | 53 (19.4) | 5 (1.8) | 0 (0.0) |
| Meatu | 223 | 167 (74.9) | 50 (22.4) | 6 (2.7) | 0 (0.0) |
| Missenyi | 163 | 134 (82.2) | 29 (17.8) | 0 (0.0) | 0 (0.0) |
| Misungwi | 429 | 334 (77.9) | 86 (20.0) | 6 (1.4) | 3 (0.7) |
| Mkalama | 100 | 76 (76.0) | 23 (23.0) | 1 (1.0) | 0 (0.0) |
| Muleba | 191 | 155 (81.2) | 34 (17.8) | 2 (1.0) | 0 (0.0) |
| Musoma | 461 | 352 (76.4) | 103 (22.3) | 4 (0.9) | 2 (0.4) |
| Ngara | 64 | 53 (82.8) | 10 (15.6) | 1 (1.6) | 0 (0.0) |
| Nyamagana | 1 107 | 876 (79.1) | 216 (19.5) | 13 (1.2) | 2 (0.2) |
| Nyang’hwale | 99 | 81 (81.8) | 18 (18.2) | 0 (0.0) | 0 (0.0) |
| Nzega | 459 | 366 (79.7) | 88 (19.2) | 5 (1.1) | 0 (0.0) |
| Rorya | 486 | 371 (76.3) | 108 (22.2) | 6 (1.2) | 1 (0.2) |
| Sengerema | 705 | 525 (74.5) | 169 (24.0) | 11 (1.6) | 0 (0.0) |
| Serengeti | 89 | 73 (82.0) | 15 (16.9) | 1 (1.1) | 0 (0.0) |
| Shinyanga | 692 | 543 (78.5) | 137 (19.8) | 12 (1.7) | 0 (0.0) |
| Sikonge | 233 | 182 (78.1) | 50 (21.5) | 0 (0.0) | 1 (0.4) |
| Singida | 330 | 267 (80.9) | 60 (18.2) | 3 (0.9) | 0 (0.0) |
| Tabora | 347 | 288 (83.0) | 53 (15.3) | 6 (1.7) | 0 (0.0) |
| Tarime | 215 | 164 (76.3) | 51 (23.7) | 0 (0.0) | 0 (0.0) |
| Ukerewe | 147 | 113 (76.9) | 31 (21.1) | 3 (2.0) | 0 (0.0) |
| Urambo | 211 | 165 (78.2) | 41 (19.4) | 5 (2.4) | 0 (0.0) |
| Uvinza | 94 | 80 (85.1) | 13 (13.8) | 1 (1.1) | 0 (0.0) |
| Uyui | 288 | 220 (76.4) | 63 (21.9) | 5 (1.7) | 0 (0.0) |
| Total | 17 200 | 13 481 (78.4) | 3492 (20.3) | 210 (1.2) | 17 (0.1) |
a We considered the number of samples returned from Buhigwe (12) to be too small to be statistically representative; all other districts returned ≥ 49 samples.
Note: We used isoelectric focusing to detect different haemoglobin types in infants aged 0–24 months.