trematode (flukes) Flashcards
chinese river flukes spp are…
Clonornorchis sinensis
Opistorchis viverini
describe the general morphology of trematodes
two suckers; oral and ventral.
oral to feed, ventral for attachment
hermatophrodites except schistosome
reservoir host for chinese river flukes is
dog
second intermediate - cryprinid fish
What is the host for Clonorchis sinensis and Opistorchis viverini?
definitive host : human
reservoir host : dog
intermediate host : fish
describe the pathogenesis of conorchis Sinensis and opistorchis viverini
in heavy infection: ▫️adult worm resides in the cystic duct, biliary duct, pancreatic duct ▫️mechanically irritate epithelium ▫️hyperplasia and fibrosis of epithelium ▫️blockage of duct ▫️impare liver function and liver swells
symptoms of C.sinensis and O.viverinii
▫️jaundice ▫️hepatomegaly ▫️gastrointestinal ▫️tinggling and numbness in skin ▫️arrhythmia ▫️muscular weakness
diagnosis of C. sinensis and O.viverini
▫️fecal smear
▫️duodenal aspirate
▫️adult flukes recoverd at surgery
Name the host for Paragonimus westermani
definitive host: human, domesticated and wild animals
describe the morphology of Paragoniswestermanii
plump reddish brown oval worm, h like flaened coffee bean. approx. 1cm in size
describe the epidemiology of Paragonimus westernmani
▫️asia and Japan
▫️assoc. eat raw seafood
▫️MOT: ingest encysted metacercaiae in crustacean/crab meat
describe the life cyle of Paragonimus westernmani
- metacercaiae ingested 2. worms hatch in small i.
- adults mature and move to lung
- adult live as pair in lung cyst, sexual, egg produce
- ehh in feces and sputum
Paragonimus westermani also known as…
lung flukes
Fascioliasis normally infect…
livestock
Fasciola hepatica also known as…
sheep liver flukes
