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The Trematodes

The Trematodes. Developing schistosome in liver. Eggs of Schistosoma mansoni . Eggs of Schistosoma mansoni in the liver . Cellular reaction around eggs of Schistosoma mansoni . Egg of S. haematobium. Schistosomaiasis granuloma . Schistosomaiasis granuloma . Schistosoma haematobium

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The Trematodes

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  1. The Trematodes

  2. Developing schistosome in liver

  3. Eggs of Schistosoma mansoni

  4. Eggs of Schistosoma mansoni in the liver

  5. Cellular reaction around eggs of Schistosoma mansoni

  6. Egg of S. haematobium Schistosomaiasis granuloma

  7. Schistosomaiasis granuloma

  8. Schistosoma haematobium Causes urinary schistosomiasis PREPATENT PERIOD 10-12 wks EGG DEPOSITION AND EXTRUSION: painless haematuria Inflammation of bladder and burning micturition TISSUE PROLIFERATION AND REPAIR: Fibrosis , papillomata in the bladder and lower ureter leading to obstructive uropathy. Periportal fibrosis Lung and CNS involvement Schistosoma mansoni Causes intestinal schistosomiasis PREPATENT PERIOD 5-7 wks EGG DEPOSITION AND EXTRUSION: dysentery (blood and mucus in stools), hepatomegaly splenomegaly TISSUE PROLIFERATION AND REPAIR:Fibrosis , Papillomata in intestine, Pperiportal fibrosis,hematemesis Lung and CNS involvement. Pathology of Schistosomiasis

  9. Schistosome dermatitis, or "swimmers itch” occurs when skin is penetrated by a free-swimming, fork-tailed infective cercaria. Source: WikiMedia.

  10. Bladder lesions in urinary schistosomiasis

  11. Hepatosplenomegaly in chronic schistosomiasis

  12. Portal hypertension in chronic schistosomiasis

  13. Portal–systemic anastomoses

  14. Schistosoma haematobium Parasitological: Examination of urine Immunological Serological tests Indirect: Radiological Cystoscopy Schistosoma mansoni Parasitological Examination of stools Immunological Serological tests Indirect: Radiological endoscopy Diagnosis of Schistosomiasis

  15. Egg of S. haematobium Egg of S. japonicum Egg of S. haematobium

  16. Egg of S. mansoni

  17. Drug of choice for schistosomiasis isPraziquantel

  18. Fasciola hepatica Fasciola hepatica

  19. Sheep liver infected with Fasciola hepatica

  20. Life-cycle of Fasciola hepatica

  21. Fasciola hepatica • Pathology and clinical picture : • True infection causes mainly biliary obstruction and liver damage . • False infection is when eggs are eaten in infected animal liver and passed in stools. • Diagnosis: eggs in stools or duodenal aspirate. • Treatment: Praziquantel.

  22. Snail intermediate host of : Fasciola hepatica

  23. Watercress , one means of transmission of fascioliasis

  24. Fasciola hepatica

  25. Fasciola hepatica adult Fasciola hepatica in bile duct

  26. Egg of Fasciola hepatica

  27. Fasciola hepatica: spurious infection (eggs in stools)

  28. Fasciolahepatica: spurious infection

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