Onchocerciasis Elimination: Progress and Challenges

Figures & data

Figure 1 Phases in the elimination of human onchocerciasis. Reproduced with permission from World Health Organization. Guidelines for Stopping Mass Drug Administration and Verifying Elimination of Human Onchocerciasis: Criteria and Procedures. Geneva, Switzerland: WHO Press; 2016. Licence: CC BY-NC-SA 3.0 IGO.³²

Figure 2 Standard black stripe Esperanza Window Trap (A) and the modified narrow black stripe EWT (B).

Notes: Reproduced with permission from Vector Control Division, Ministry of Health Uganda, Slash & Clear Project, 2018.

Figure 3 Distribution of onchocerciasis in the Americas, 2017.

Notes: Reprinted from Sauerbrey M, Lindsay JR, Richards FO Jr. Progress toward elimination of onchocerciasis in the Americas. Int Health. 2018;10:i71–i78, by permission of Oxford University Press.¹²

Table 1 Onchocerciasis in the Americas: Population at Risk, No Longer at Risk, Under Post-Treatment Surveillance (PTS), Eligible for Treatment and Transmission Status by Focus in 2017

Country	Focus			Treatment Approach	Rounds >85% Through 2016	Number of Communities	Population at Risk	Population No Longer at Risk		Population Eligible for Treatment	Status of Transmission
Colombia	Lopez de Micay			2×/year	20	1		1366			Eliminated in 2010
Ecuador	Esmeraldas			2×/year	25	119		25,863			Eliminated in 2012
Mexico	North Chiapas			2×/year	17	13		7125			Eliminated in 2010
	Oaxaca			2×/year	18	98		44,919			Eliminated in 2011
	South Chiapas			2×/year	25	396		83,218			Eliminated in 2014
				4×/year	35	163		34,607
				Focus total		559		117 825
Guatemala	Escuintla			2×/year	13	117		62,590			Eliminated in 2010
	Santa Rosa			2×/year	16	37		12,208			Eliminated in 2010
	Huehuetenango			2×/year	17	43		30,239			Eliminated in 2011
	Central			2×/year	22	321		126 430			Eliminated in 2014
Venezuela	North central			2×/year	17	45		14,385			Eliminated in 2013
	Northeast			2×/year	20	330		73,212			Eliminated in 2017
				4×/year	9	135		22,355
				Focus total		465		95,567
	South			2×/year	16	66	4248			3744	Ongoing
				4×/year	9	236	10,838			9273
				Focus total		302	15,086			13,017
Brazil	Amazonas			2×/year	26	117	7209			5954	Ongoing
				4×/year	13	122	8266			6634
				Focus total		239	15,475			12,588
Regional total						2359	30,561	538 517		25,605

Notes: Reprinted from Sauerbrey M, Lindsay JR, Richards FO Jr. Progress toward elimination of onchocerciasis in the Americas. Int Health. 2018;10:i71–i78, by permission of Oxford University Press.¹²

World Health Organization. Guidelines for Stopping Mass Drug Administration and Verifying Elimination of Human Onchocerciasis: Criteria and Procedures. Geneva, Switzerland: WHO Press; 2016.

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Sauerbrey M, Lindsay JR, Richards FO Jr. Progress toward elimination of onchocerciasis in the Americas. Int Health. 2018;10:i71–i78.doi:10.1093/inthealth/ihx039.29471334

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