Estimated number of individuals in the country requiring preventive chemotherapy for onchocerciasis by country
Countries reporting
31
Highest
57.75 million
Congo, Democratic Republic of the
Lowest
16,071
Venezuela, Bolivarian Republic of
Median
3.80 million
Years covered
12
2013–2024
Data points
331
What the numbers show
Estimated number of individuals in the country requiring preventive chemotherapy for onchocerciasis is currently reported for 31 countries. The highest value is 57.75 million in Congo, Democratic Republic of the; the lowest is 16,071 in Venezuela, Bolivarian Republic of.
The median across all reporting countries is 3.80 million, and the mean is 8.15 million.
The gap between the highest and lowest reporting country is a factor of about 3,593.
Over the past decade 26 countries rose and 5 fell. The largest increase was in Mozambique (up 8,329.3%), and the largest decrease in Uganda (down 85.4%).
Estimated number of individuals in the country requiring preventive: full country ranking
| # | Country | Latest | Year | 10-year change | Trend |
|---|---|---|---|---|---|
| 1 | Congo, Democratic Republic of the | 57.75 million | 2024 | up 32.7% | rising |
| 2 | Nigeria | 40.38 million | 2024 | down 21.4% | falling |
| 3 | Ethiopia | 30.56 million | 2024 | up 152.4% | rising |
| 4 | Côte d'Ivoire | 22.62 million | 2024 | up 868.8% | volatile |
| 5 | Guinea | 11.78 million | 2024 | up 250.8% | rising |
| 6 | Cameroon | 11.77 million | 2024 | up 31.7% | rising |
| 7 | South Sudan | 9.77 million | 2024 | up 40.2% | rising |
| 8 | Mali | 7.31 million | 2024 | up 39.7% | rising |
| 9 | Sierra Leone | 7.07 million | 2024 | up 118.0% | rising |
| 10 | Tanzania, United Republic of | 6.88 million | 2024 | up 94.3% | rising |
| 11 | Angola | 6.77 million | 2024 | up 159.5% | rising |
| 12 | Benin | 6.55 million | 2024 | up 85.9% | rising |
| 13 | Chad | 6.17 million | 2024 | up 139.2% | rising |
| 14 | Ghana | 5.20 million | 2024 | up 104.3% | rising |
| 15 | Liberia | 3.84 million | 2024 | up 20.9% | rising |
| 16 | Central African Republic | 3.80 million | 2024 | up 76.7% | rising |
| 17 | Togo | 3.40 million | 2024 | up 6.8% | falling |
| 18 | Burundi | 2.27 million | 2024 | up 0.3% | rising |
| 19 | Malawi | 2.03 million | 2024 | down 11.2% | falling |
| 20 | Yemen | 1.46 million | 2024 | up 386.6% | volatile |
| 21 | Mozambique | 1.43 million | 2024 | up 8,329.3% | volatile |
| 22 | Congo | 841,658 | 2024 | down 42.3% | falling |
| 23 | Gabon | 783,365 | 2024 | up 1,003.3% | volatile |
| 24 | Uganda | 651,348 | 2024 | down 85.4% | falling |
| 25 | Guinea-Bissau | 646,572 | 2024 | up 236.2% | rising |
| 26 | Senegal | 356,387 | 2022 | up 97.5% | volatile |
| 27 | Burkina Faso | 340,655 | 2024 | up 47.4% | rising |
| 28 | Sudan | 196,703 | 2024 | down 70.3% | falling |
| 29 | Equatorial Guinea | 98,797 | 2019 | up 15.1% | rising |
| 30 | Brazil | 16,842 | 2024 | up 20.5% | rising |
| 31 | Venezuela, Bolivarian Republic of | 16,071 | 2024 | up 25.6% | rising |