TREMATODA  Fasciolopsis buski
Introduction <ul><li>Fasciolopsis buski  lives in the small intestine of humans and pigs.  </li></ul><ul><li>Measuring up ...
MORPHOLOGY : ADULT  <ul><li>The adult flukes range in size: 20 to 75 mm by 8 to 20 mm.  </li></ul><ul><li>No cephalic cone...
 
The adult flukes range in size: 20 to 75 mm by 8 to 20 mm.  Fasciolopsis Buski adult; approximate length = 50 mm
Typical gymnocephalus cercaria of a fascioliid.  This is a ventral view showing the spherical acetabulum framed by the two...
This photo is to compare the sizes of  Fasciolopsis buski  (left) and  Fasciola hepatica  (right), 2x.
<ul><li>Egg is practically indistinguishable from those of  Fasciola hepatica .  </li></ul><ul><li>The eggs are ellipsoida...
 
Life cycle
Cont.. <ul><li>Immature eggs are discharged into the intestine and stool. </li></ul><ul><li>Eggs become embryonated in wat...
Pathogenicity & Symptom <ul><li>Most infections are light and asymptomatic.  </li></ul><ul><li>In heavier infections, symp...
Laboratory Diagnosis  <ul><li>Microscopic identification of eggs, or more rarely of the adult flukes, in the stool or vomi...
 
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F.buski

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the Medical Parasitology of Fasciolopsis buski of BioMedical Science

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  • FiFi Faridz BioMedical Science
  • F.buski

    1. 1. TREMATODA Fasciolopsis buski
    2. 2. Introduction <ul><li>Fasciolopsis buski lives in the small intestine of humans and pigs. </li></ul><ul><li>Measuring up to 80 mm in length </li></ul><ul><li>largest trematodes found in humans </li></ul><ul><li>Geographic Distribution: Asia and the Indian subcontinent, especially in areas where humans raise pigs and consume freshwater plants. </li></ul><ul><li>As with many other parasites that infect humans, pigs serve as a reservoir host </li></ul><ul><li>Can cause Fascioslopsiasis </li></ul>
    3. 3. MORPHOLOGY : ADULT <ul><li>The adult flukes range in size: 20 to 75 mm by 8 to 20 mm. </li></ul><ul><li>No cephalic cone, acetabulum larger than oral sucker. </li></ul><ul><li>Testis posterior & branched. </li></ul><ul><li>Attach themselves to the tissues of the small intestine of the host by means of ventral suckers; the sites of attachment may later ulcerate and form abscesses. </li></ul>
    4. 5. The adult flukes range in size: 20 to 75 mm by 8 to 20 mm. Fasciolopsis Buski adult; approximate length = 50 mm
    5. 6. Typical gymnocephalus cercaria of a fascioliid.  This is a ventral view showing the spherical acetabulum framed by the two branches of the caeca.  This Fasciolopsis buski cercaria is indistinguishable from the cercaria of Fasciola hepatica .  100x
    6. 7. This photo is to compare the sizes of Fasciolopsis buski (left) and Fasciola hepatica (right), 2x.
    7. 8. <ul><li>Egg is practically indistinguishable from those of Fasciola hepatica . </li></ul><ul><li>The eggs are ellipsoidal, with a thin shell, and a usually small, indistinct operculum, range in size: 130 to 159 µm by 78 to 98 µm. </li></ul>MORPHOLOGY : EGG
    8. 10. Life cycle
    9. 11. Cont.. <ul><li>Immature eggs are discharged into the intestine and stool. </li></ul><ul><li>Eggs become embryonated in water , eggs release miracidia , which invade a suitable snail intermediate host. </li></ul><ul><li>In the snail the parasites undergo several developmental stages (sporocysts, rediae, and cercariae ). </li></ul><ul><li>The cercariae are released from the snail and encyst as metacercariae on aquatic plants. </li></ul><ul><li>The mammalian hosts become infected by ingesting metacercariae on the aquatic plants. </li></ul><ul><li>After ingestion, the metacercariae excyst in the duodenum and attach to the intestinal wall. </li></ul><ul><li>There they develop into adult flukes (20 to 75 mm by 8 to 20 mm) in approximately 3 months, attached to the intestinal wall of the mammalian hosts (humans and pigs). </li></ul><ul><li>The adults have a life span of about one year. </li></ul>
    10. 12. Pathogenicity & Symptom <ul><li>Most infections are light and asymptomatic. </li></ul><ul><li>In heavier infections, symptoms include diarrhea, abdominal pain, fever, ascites, and intestinal obstruction. </li></ul><ul><li>Chronic infections with this parasite lead to inflammation, ulceration, hemorrhage, and abscesses of the small intestine, and these can ultimately lead to the host's death. </li></ul>
    11. 13. Laboratory Diagnosis <ul><li>Microscopic identification of eggs, or more rarely of the adult flukes, in the stool or vomitus is the basis of specific diagnosis. </li></ul><ul><li>The eggs are indistinguishable from those of Fasciola hepatica . </li></ul>Treatment : Praziquantel
    12. 15. NEXT: Paragonimus westermani

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