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Eukaryotic Parasites (Protozoa) Drs. Babcock and Hopkins Spring 2009

Eukaryotic Parasites (Protozoa) Drs. Babcock and Hopkins Spring 2009. Entamoeba histolytica (amebiasis, severe diarrhea). Acquired through consumption of contaminated food or water. Trophozoite is feeding and reproducing stage and causes disease. Cyst is circular and

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Eukaryotic Parasites (Protozoa) Drs. Babcock and Hopkins Spring 2009

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  1. Eukaryotic Parasites(Protozoa)Drs. Babcock and HopkinsSpring 2009

  2. Entamoeba histolytica (amebiasis, severe diarrhea) Acquired through consumption of contaminated food or water. Trophozoite is feeding and reproducing stage and causes disease. Cyst is circular and is what is ingested. Trophozoite forms pseudopodia. Target nuclei in both.

  3. Entamoeba Histolytica trophozoites

  4. Entamoeba histolytica cysts

  5. Entamoeba histolytica with ingested erythrocytes

  6. Balantidium coli (balantidiasis) Trophozoite has cilia. Cyst does not. Large nucleus. Can cause diarrhea and in severe cases ulcers and abscesses that can lead to dysentery and death.

  7. Balantidium coli

  8. Balantidium colitrophozoites

  9. Balantidium colitrophozoites

  10. Giardia intestinalis - giardiasis 2 nuclei Flagella on Trophozoite.

  11. Giardia intestinalis - trophozoite

  12. Giardia intestinalis trophozoite

  13. Giardia intestinalis trophozoite

  14. Trichomonas vaginalis life cycle Single nucleus Flagella. NO CYST form. Vaginitis with malodorous discharge and pruritis.

  15. Trichomonas vaginalis trophozoite

  16. Trichomonas vaginalis trophozoite

  17. Trypanosoma brucei Flagellated. Seen in blood Smear outside of RBCs. Tsetse fly Arthropod vector, Tsetse fly. Infection through bite and causes African Sleeping Sickness.

  18. Trypanosoma brucei

  19. Plasmodium falciparum Seen in blood smear inside RBCs. Undergoes schizogony. Causes Malaria Arthropod vector - Anopheles is vector

  20. Plasmodium falciparum Plasmodium vivax Plasmodium ovale Plasmodium malariae

  21. Plasmodium falciparum“blackwater fever”

  22. Toxoplasma gondii Produce toxoplasmosis iIn humans when cysts ingested. transplacental transfer can occur.

  23. Toxoplasma gondii

  24. Toxoplasma gondii

  25. Eukaryotic Parasites The HelminthsCestodes = TapewormsTrematodes = FlukesNematodes = Roundworms

  26. Ascaris lumbricoides life cycle Roundworm, dioecious. Both male and female worms.

  27. Ascaris lumbricoides (nematode)

  28. Ascaris lumbricoides eggs in fecal smear

  29. Ascaris lumbricoides

  30. Clonorchis sinensis life cycle(Oriental liver fluke-Trematode) Metacercariae are cystlike and dormant and ingested. Maturation occurs in small Intestine. Snail, intermediate host

  31. Clonorchis sinensis worm

  32. Clonorchis sinensis worm Monoecious, have both male and female sex organs.

  33. Clonorchis sinensis eggs

  34. Dipylidiumcaninum: Cestode, tapeworm, monoecious.

  35. Dipylidiumcaninum – eggs (eggball)

  36. Dipylidiumcaninum eggs

  37. Dipylidiumcaninum scolex and proglottidsstrobilia, immature, mature and gravid.

  38. Echinococcus granulosus – hydatid cysts tapeworm. Small, only 3 proglottids. Hydatid sand, cysts in infected tissue.

  39. Echinococcus granulosus worm and eggs Hooks on eggs for attachment

  40. Echinococcus granulosus worm and eggs

  41. Encysted scolices of Echinococcus granulosus in lung ("hydatid sand“)

  42. Enterobiusvermicularis (pinworm) Nematode, dioecious

  43. Enterobiusvermicularis (pinworm)

  44. Enterobiusvermicularis eggs

  45. Enterobiusvermicularis worms

  46. Ancylostoma (hookworm), nematode. Ancylostoma

  47. Ancylostoma (hookworm)

  48. Ancylostoma (hookworm) Burrows through skin, enters bloodstream and travels to lungs. Swallowed and Establishes in intestine. Attaches and consumes host blood.

  49. Ancylostoma eggs

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