USMLE

Onchocerca volvulus

720 views
Parasites
  1. Giardia lamblia
  2. Toxoplasma gondii
  3. Entamoeba histolytica
  4. Cryptosporidium
  5. Naegleria fowleri
  6. Trypanosoma brucei
  7. Plasmodium Overview
  8. Plasmodium Disease (Malaria)
  9. Babesia
  10. Trypanosoma cruzi
  11. Leishmania
  12. Trichomonas vaginalis
  13. Enterobius vermicularis (pinworm)
  14. Ascaris lumbricoides (giant roundworm)
  15. Strongyloides stercoralis (threadworm)
  16. Ancyclostoma and Necator
  17. Trichinella spiralis
  18. Trichuris trichiura (whipworm)
  19. Toxocara canis
  20. Onchocerca volvulus
  21. Loa loa
  22. Wuchereria bancrofti
  23. Taenia solium
  24. Diphyllobothrium latum
  25. Echinococcus granulosus
  26. Schistosoma
  27. Clonorchis sinensis
  28. Sarcoptes scabiei (Scabies)
  29. Pediculus humanis and Phthirus pubis (Lice)

Summary

Onchocerca volvulus, or Onchocerca for short, is a nematode or roundworm parasite transmitted to humans through bites from the black fly. The disease that Onchocerca causes is Onchocerciasis.Clinically, onchocerciasis presents with eye involvement and vision loss, subcutaneous nodules, and pruritus. Infections with onchocerca can be treated with Ivermectin.

Key Points

  • Onchocerca volvulus
    • Characteristics
      • Type of nematode (roundworm) parasite
    • Transmission
      • Bite of blackfly
    • Presentation: Onchocerciasis
      • Eye involvement
      • Subcutaneous nodules
      • Pruritis
    • Diagnosis
      • Skin snip biopsy is gold standard
    • Treatment
      • Ivermectin