Liver Flukes Flashcards
More common in tropical climate
A. Fasciola hepatica
B. Fasciola gigantica
C. Equal
B
A.Heterophyid fluke eggs are embryonated when excreted into environment
B.Heterophyid fluke eggs hatch before they are ingested by suitable snail intermediate host
C. Fasciola gigantica is more common than Fasciola hepatica
Which is false?
B
Treatment for fascioliasis A. Triclabendazole B. Praziquantel C. Both A and B D. Either A or B
A
Fasciola eggs released in the biliary eggs and stool are:
A. Embryonated
B. Immature
C. Gravid
B
First IM host of Fasciola. This is where miracidia enters
Lymnaea philippinensis
Metacercaria encyst in __ plants
A. Aquatic
B. Terrestrial
C. Aerial
A.Aquatic
Where (in what organ) does Fasciola develop into an adult?
Biliary duct
Eggs pass through the \_\_\_ from liver to small intestine. It eventually gets mixed with stool. A.hepatic portal vein B.common bile duct C.hepatic artery D.portal triad
B
T or F
Metacercaria needs second intermediate host for life cycle to proceed.
F
It can encyst in the water if there is no available 2nd IM host. Infection by ingestion of contaminated water is therefore possible.
Which usually does not happen in fascioliasis acute stage? A. Larval migration to liver B. High fever and eosinophilia C. Hepatomegaly D. Hemobilia
D
Sa latent phase ang hemobilia
Which usually does not happen in fascioliasis chronic stage? A. Worm maturation B. Parasite is in the bile duct C. Inflammation of biliary epithelium D. Hemobilia
A
A is in acute fascioliasis
Identify
Suffocation as result of temporary lodgment of the worm in the pharynx, after ingestion of infected liver
Halzuon
Which is not a parasite of the bile duct & gall bladder? A. Clonorchis sinensis B. Metagonimus yokogawai C. Opistorchis felineus D. Opistorchis viverrini
B
May contribute to bile duct cancer, but not in PHL because no 1st IM host A. Clonorchis sinensis B. Metagonimus yokogawai C. Opistorchis felineus D. Opistorchis viverrini
A
Assoc with consuming poorly cooked or raw infected fish A. Clonorchis sinensis B. Metagonimus yokogawai C. Opistorchis felineus D. Opistorchis viverrini
C
Assoc with consuming fish salad A. Clonorchis sinensis B. Metagonimus yokogawai C. Opistorchis felineus D. Opistorchis viverrini
D
Infective stage of gall bladder trematodes
Metacercaria in infected raw or undercooked fish
Adult fluke can be found in the ff locations except A. Bile duct B. Pancreatic duct C. Gall bladder D. Spleen
D
When adult fluke attaches to mucosa, does it cause permanent ulceration?
No
T or F
Clonorchis/Opistorchis releases immature egg @ feces
F
Mature dapat
Snail intermediate host of Clonrorchis sinensis (in lab)
Parafossarulus
Snail intermediate host of Opistorchis felineus or Opistorchis viverrini
Bithynia
Which stage of development does not happen in first IM host? A. Sporocyst B. Redia C. Cercaria D. Metacercaria
D
Second IM host of Clonorchis or Opistorchis
Fish @ family Cyprinidae
Main similarity of Clonorchis sinensis, Opistorchis felineus & Opistorchis viverrini
Location of vitellaria
Main difference of Clonorchis sinensis, Opistorchis felineus & Opistorchis viverrini
Morphology and arrangement of testes
Which has two large highly branched testes arranged in tandem in the posterior half of the body? A. Clonorchis sinensis B. Opistorchis sp. C. Fasciola sp. D. All of the above
A
Which have lobate testes arranged quite obliquely? A. Clonorchis sinensis B. Opistorchis sp. C. Fasciola sp. D. All of the above
B
False about Clonorchis/Opistorchis eggs A. Well-developed and asymmetrical miracidia inside B. Distinctly concave operculum C. Small protuberance at abopercular end D. None of the above
B
Food source of Fasciola hepatica or Fasciola gigantica
Nasturtium officinale or watercress
Food sources of Clonorchis sinensis
Cyprinidae fish
Crustacea
