helminthology - du.edu.eg
TRANSCRIPT
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Helminthology
Helminthic Infections
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Helminthic Infections - Classification
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Flatworms – TrematodesTapeworms – Cestodes
Roundworms – Nematodes
Platyhelminthes
Nemathelminthes
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SchistosomaS. mansoniS. hematobiumS. japonicum
Trematodes (flukes)
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Fasciola hepatica.Heterophyes het.
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Liver flukesLiver flukesLiver flukesLiver flukes
''Fascioliasis''''Fascioliasis''''Fascioliasis''''Fascioliasis''
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Distribution
Fasioliasis occurs in areas wheresheep, cattle and goats are raised asin U.S.A, Great Britain, Ireland,Middle East, Africa, Australia andCaribbean area.
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Liver flukesLiver flukesLiver flukesLiver flukes
Fasciola giganticaFasciola giganticaFasciola hepaticaFasciola hepatica
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Fasciola giganticaFasciola giganticaFasciola giganticaFasciola gigantica
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Fasciola hepaticaFasciola hepaticaFasciola hepaticaFasciola hepatica
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SnailsSnails
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Water cress is the most
common
source of metacercaria
for man
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PathogenesisPathogenesisDiagnosisDiagnosis
Penetration of the livercapsule.
Later complications.
Ectopic fascioliasis.
Halzoun.
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TreatmentTreatment
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Early discovery of the disease.
Combined surgical and medicaltreatment
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Bithionol
Praziquantel
Triclabendazole
Nitazoxanide
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Fasciolopsis buski:Giant intestinal fluke
Geographic distribution
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Fasciolopsis buski:Morphology
5 cm
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Fasciolopsis buski:Life cycle
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Fasciolopsis buski:Symptoms
Epigastric painNauseaDiarrheaGeneralized edema and ascitis,in heavier infections
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Fasciolopsis buski :Diagnosis
SymptomsHistory of eating uncooked waterchestnuts in endemic areasEggs in stool
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Fasciolopsis buski:Treatment and Control
Praziquantel is effective
Avoid eating uncooked chestnuts inendemic areasSanitary disposal of sewageElimination of snails
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Heterophyes heterophyes
Japan,China,Philippines,Turkey andNile delta region of Egypt
One of the intestinal flukes thatinhabit the small intestine
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Heterophyes heterophyes
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Heterophyes heterophyes
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Heterophyes heterophyes
Definitive hostDefinitive host
IntermediateIntermediate
Reservoir hostReservoir host
Pirenella conicaPirenella conicaPirenella conicaPirenella conica
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Heterophyes heterophyes
Infective stage: ????
Stages in the life cycle: Egg-Miracidium-sporocyst-redia-cercaria-Encysted metacercaria
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Pathogenesis
Attachment of the flukes to
Mild Severe
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Metagonimus yokogawi
Habitat S.I
D.H Man
I.H Melania
libertina
I.S Encysted
metacercaria
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Diagnosis
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Treatment
Praziquantel.
Niclosamide (Yomesan).
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Control
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Fishes
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