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Parasite practical

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DR/ MUAATH ALSAFANI Practical parasitology 1 Blood flukes "Schistosoma spp"  ILOC:  Known the classification of schistosoma .  Known the life cycle "D.H ,I.H ,I.S and D.S "of schistosoma.  Known the morphology of adult and ova of schistosoma .  Phylum : Platyhelminthes "flat worms "  Class :Trematoda.  Genus : Schistosoma.  Species : S.haematobium . S.mansoni S.japonicum  Life cycle : o Disease: schistosomiasis or Katayama fever or Bilharzia. o Diagnostic stage : Embryonated eggs " contain miracidia" 2 o Intermediate host : snail S.haematobium ……………..Bulinus truncates. S.mansoni……………………….Biomphalaria alexandrina. S.japonicum …………………………..Oncomelania. o Infective stage: Cercariae "furcocercous " o Definitive host : Human. o Habitat :  S.haematobium ……………veins of urinary bladder.  S.mansoni…………veins of rectum and the lower part of small intestine.  S.japonicum …………………veins of upper part of intestine. o Mode of infection : Conatact with water containing the infective stage of cercariae "furcocercous" which is penetration the skin  Morphology: 1- Adult 1- Adult  Adult male Flattened , short 10×1mm. Cuticle provided with tubercles. Posterior end is curved ventrally. 3  Adult female Long , slender 20 ×0.2mm. Cylindrical with smooth cuticle. Suckers are weakly developed. Uterus straight tube 20 - 30 eggs . 2- ...
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