Orphanet: Onchocerciasis

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Disease definition

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.


Classification level: Disorder
  • Synonym(s): -
  • Prevalence: <1 / 1 000 000
  • Inheritance: Not applicable 
  • Age of onset: All ages
  • ICD-10: B73
  • OMIM: -
  • UMLS: C0029001  C0029002
  • MeSH: D009855  D015827
  • GARD: 7252
  • MedDRA: 10030314  10039202

Detailed information


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