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Table 2 Surveyed area and population by estimated nodule prevalence in the 20 APOC countries

From: The geographic distribution of onchocerciasis in the 20 participating countries of the African Programme for Onchocerciasis Control: (2) pre-control endemicity levels and estimated number infected

Country Total surveyed area Surface (1000 km2) Estimated population (1000) Estimated population as % of total population of surveyed area
Population per km2 in CDTi area Surface (1000 km2) Estimated Population (1000) Prevalence of nodules 0-4.9% Prevalence of nodules 5-19.9% Prevalence of nodules ≥ 20% Prevalence of nodules 0-4.9% Prevalence of nodules 5-19.9% Prevalence of nodules ≥ 20% Prevalence of nodules 0-4.9% Prevalence of nodules 5-19.9% Prevalence of nodules ≥ 20%
Angola 3.8 1,015 3,812 278 570 166 1,046 2,142 625 27.4 56.2 16.4
Burundi 341.0 24 8,252 11 11 2 3,821 3,760 671 46.3 45.6 8.1
Cameroon 24.2 430 10,389 64 149 217 1,555 3,599 5,234 15.0 34.6 50.4
CAR 5.2 448 2,312 135 81 232 697 418 1,198 30.1 18.1 51.8
Chad 21.6 257 5,557 152 51 54 3,286 1,099 1,171 59.1 19.8 21.1
Congo 34.8 271 9,432 194 62 15 6,750 2,159 523 71.6 22.9 5.5
DRC 22.1 2,053 45,391 318 683 1,052 7,040 15,089 23,262 15.5 33.2 51.2
Eq Guinea 22.0 23 433 3 18 1 54 298 81 12.4 68.8 18.7
Ethiopia 46.7 446 20,842 168 152 126 7,844 7,094 5,904 37.6 34.0 28.3
Gabon NA 191 722 88 101 2 333 381 8 46.1 52.8 1.2
Kenya NA 57 3,035 57 0 0 3,035 0 0 100.0 0.0 0.0
Liberia 30.2 96 2,884 0 42 53 10 1,269 1,604 0.3 44.0 55.6
Malawi 237.4 77 18,245 61 11 4 14,529 2,708 1,008 79.6 14.8 5.5
Mozambique NA 549 9,889 483 65 1 8,694 1,170 25 87.9 11.8 0.2
Nigeria 65.3 858 56,016 175 463 220 11,440 30,239 14,336 20.4 54.0 25.6
Rwanda NA 20 9,550 19 1 0 9,550 0 0 100.0 0.0 0.0
South Sudan 13.8 535 7,380 115 206 214 1,591 2,842 2,947 21.6 38.5 39.9
Sudan 14.6 346 5,053 331 13 2 4,841 190 23 95.8 3.8 0.4
Tanzania 19.4 393 7,631 221 66 106 4,289 1,276 2,065 56.2 16.7 27.1
Uganda 56.4 180 10,135 128 28 24 7,208 1,556 1,371 71.1 15.4 13.5
Total 27.1 8,270 236,959 3,004 2,774 2,493 97,611 77,291 62,056 41.2 32.6 26.2