1 / 35

Introduction to trematoda

Introduction to trematoda. Assistanted Prof. Sheng. MORPHOLOGY. 1. SHAPE ： Leaf-shape 、 tong-shape ， Oral sucker 、 ventral sucker. 2. Digestive system ： Compose with mouth 、 pharynx 、 esophagus 、 cecum. 3. Reproductive system ：. Strong , most of them are hermaphrodite.

wade-fulton
Download Presentation

Introduction to trematoda

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Introduction to trematoda Assistanted Prof. Sheng

  2. MORPHOLOGY 1. SHAPE： Leaf-shape、tong-shape， Oral sucker、ventral sucker 2. Digestive system： Compose with mouth、 pharynx、esophagus 、cecum

  3. 3. Reproductive system： Strong , most of them are hermaphrodite ovary、ootype、Uterine tube Seminal receptacle、Laurer’s canal、Egg’model、Me’glands 、 Vitelline glands and uterus.

  4. ： testes 、efferent ductule、deferential duct 、seminal vesicle 、prostate 、penis 、packet of penis.

  5. Life cycle complication： a. adult parasite in human being and mammal,worm parasite in aquatic animal (example:snail)

  6. b. Growing process include: egg sporocyst cercaria miracidium redia metacercaria Young worm adult

  7. do you know what disease you will suffer from by eating raw fish and shrimb

  8. Clonorchis sinensis

  9. morphology 1. adult • Shape: • Sucker: • Cecum: • Hermaphrodite:

  10. operculum Shoulder peak miracidium Verrucous thing 2. egg • Shape : • Size: • Colour: • Egg shell: • Content:

  11. Life cycle Egg pass into water in feces Egg adult Egg are swallow by snail and hatch by it All these stages grow in snail miracidium sporocyst redia cercaria Cercaria leave snail and eated by fresh-water fish Man is infected by Eating uncooked fish metacercaria adult Young worm

  12. Pathogenesis and clinical maniefstation The pathogenesis It cause the sell of duct fall off and cause the sell have hyperplasia and inflammation Adult’s mechanical destruction Secretion and excretion’s toxicity The duct wall become thick The duct Become narrow The tissue fibre The worm blockage Duct blockage Bile retention Duct expand They cause liver sell Atrophy, necrosis and cirrhosis cirrhosis

  13. The diseases Blockage icterus Cholangitis and hepatitis Cholelithiasis cirrhosis Liver duct cancer Actute hemorrhagic necrosis of pancreas

  14. Adult parasite in the bile

  15. Adult crow in liver duct

  16. Blockage icterus Adult in the duct

  17. cholelithiasis

  18. cholelithiasis

  19. Ascites and epigastric

  20. Liver parm

  21. Spider-shape vein

  22. Liver duct cancer

  23. Actute hemorrhagic necrosis of pancreas

  24. dwarf

  25. No symptom

  26. Clinical manifestation • Most of them have no obvious symptom • Some feel tiredness ,hepatic enlargement, right upper quadrant mild pain ,abdominal pain ,anorexia, dizziness. • When it become serious the patient has ascites , unconscious and will die later.

  27. Diagnosis Dialogue about case histories: a.Whether come from epedemiologic area b.Whether have the habit of eating raw fresh water fish or shrimp

  28. 1.laboratory diagnosis : Detect eggs – make sure diagnosis a. Stool examination • Direct amear method • Nature sedimentation’method • Formalin –ether method b. The duodenum secretion examination

  29. 2. Immunologic examination • IH test • IHA • ELISA 3. Ultrasonic wave examination

  30. epidemiology • Local epidemic • Infective rate :1%~30%,some are 80% • Epidemic area: • Japan、Korea 、Vinan 、Thailand

  31. China:

  32. Epidemic factor: • Infective resource: patient and carrier , • reservoir host • Spread way:egg pass into water in feces intermediate host exit ,people have the habit of eating raw fish or raw shrimb • Susceptible people : all people

  33. treatment 1.hygiene education • Do not eat raw fish or raw shrimb • Not let cat eat raw fish or raw shrimb too 2.treat the patient and carrier 3. Not let the feces pass into the fresh-water

  34. ？ Now do you still dare to eat the raw fish or raw shrimb ！

More Related