Reported number of individuals treated for onchocerciasis by country

Countries reporting
32
Highest
44.32 million
Congo, Democratic Republic of the
Lowest
0
Sudan
Median
1.80 million
Years covered
20
2005–2024
Data points
511

What the numbers show

Reported number of individuals treated for onchocerciasis is currently reported for 32 countries. The highest value is 44.32 million in Congo, Democratic Republic of the; the lowest is 0 in Sudan.

The median across all reporting countries is 1.80 million, and the mean is 5.38 million.

Over the past decade 22 countries rose and 9 fell. The largest increase was in Yemen (up 1,878.2%), and the largest decrease in Equatorial Guinea (down 100.0%).

Reported number of individuals treated for onchocerciasis: full country ranking

#Country LatestYear 10-year changeTrend
1 Congo, Democratic Republic of the 44.32 million 2024 up 70.1% rising
2 Nigeria 24.29 million 2024 down 45.3% rising
3 Ethiopia 20.33 million 2024 up 108.6% volatile
4 Côte d'Ivoire 17.96 million 2024 up 862.9% volatile
5 Cameroon 8.89 million 2024 up 23.4% rising
6 Guinea 7.23 million 2024 up 655.4% volatile
7 Tanzania, United Republic of 5.91 million 2024 up 77.1% volatile
8 Mali 5.51 million 2024 up 871.9% rising
9 South Sudan 5.38 million 2024 up 262.4% volatile
10 Benin 4.84 million 2024 up 63.9% rising
11 Chad 4.74 million 2024 up 173.8% volatile
12 Ghana 4.33 million 2024 up 28.4% volatile
13 Liberia 3.12 million 2024 up 17.7% rising
14 Togo 3.06 million 2024 up 13.4% rising
15 Angola 2.68 million 2024 up 1,740.9% volatile
16 Burundi 1.94 million 2024 up 50.6% rising
17 Malawi 1.66 million 2024 down 8.3% rising
18 Central African Republic 1.66 million 2024 up 154.6% rising
19 Yemen 1.29 million 2023 up 1,878.2% volatile
20 Congo 772,264 2024 up 35.1% rising
21 Uganda 596,500 2024 down 77.8% falling
22 Guinea-Bissau 443,616 2024 up 256.3% volatile
23 Sierra Leone 414,286 2024 down 87.9% rising
24 Senegal 327,943 2022 up 172.3% volatile
25 Burkina Faso 270,762 2024 up 34.0% rising
26 Guatemala 105,606 2011 down 35.9% falling
27 Mexico 102,227 2011 down 29.3% falling
28 Ecuador 15,425 2009 falling
29 Brazil 11,514 2024 up 16.8% rising
30 Venezuela, Bolivarian Republic of 8,958 2024 down 8.7% volatile
31 Equatorial Guinea 0 2019 down 100.0% volatile
31 Sudan 0 2024 down 100.0% volatile

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Reported number of individuals treated for onchocerciasis by country. Statizoid, drawing on World Health Organization, Global Health Observatory. Retrieved 31 August 2026, from https://health.statizoid.com/stat/reported-number-of-individuals-treated-for-onchocerciasis/

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About this data

Indicator
Reported number of individuals treated for onchocerciasis
Source
World Health Organization, Global Health Observatory
Licence
CC BY-NC-SA 3.0 IGO (WHO)
Coverage
33 places, 511 data points, 2005–2024
Last refreshed