onchocerciasis
Findings
No curated finding names onchocerciasis yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Onchocerciasis is a form of filariasis, caused by the parasitic worm Onchocerca volvulus, transmitted by the black fly. The infection can either be asymptomatic or manifest as an ocular disease (river blindness) with itchy eyes, erythema, photophobia, onchodermatitis or onchocercal skin disease (classified into acute papular, chronic papular, lichenified, atrophic, and depigmentated) and onchocercomas (over bony prominences). Other classic clinical manifestations are ichthyosis-like lesions (''lizard skin'') and ''hanging groin'', which may be associated with lymphadenopathy.
Definition from the Mondo Disease Ontology (MONDO:0017137), read 2026-09-29. CC BY 4.0.
Features
2 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, hp/releases/2026-09-01.
- BlindnessMondoHP:0000618
- Skin rashMondoHP:0000988
Where it sits
- Narrower terms (1)
Other names
2 names
Resolves to: onchocerciasis
- Also called
- infection by Onchocerca volvulusOnchocerca volvulus infection