PARASITOLOGY MIDTERM EXAM
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Questions and Answers

What is the primary habitat of Fasciola hepatica?

  • Fish's gills
  • Intestine of the definitive host
  • Snail's digestive system
  • Biliary ducts of the liver (correct)

    • Which of the following is an intermediate host for Clonorchis sinensis?

  • Snail
  • Ant
  • Crab
  • Fish (correct)

    • How do adult Fasciola hepatica attach themselves to the host's internal organs?

  • Using their hooks and suckers (correct)
  • Through skin penetration
  • By ingestion of contaminated food
  • Using their ventral and genital suckers

    • What is the characteristic of Fasciola gigantica eggs?

    <p>Operculated, embryonated</p> Signup and view all the answers

    How many intermediate hosts are required for the life cycle of Schistosomes?

    <p>1</p> Signup and view all the answers

    What is the common name for Fasciola hepatica?

    <p>Sheep Liver Fluke</p> Signup and view all the answers

    Which liver fluke has a deeply lobulated shape?

    <p>Opistorchis viverrini</p> Signup and view all the answers

    What is the primary mode of transmission for Opistorchis felineus?

    <p>Ingestion of infected fish</p> Signup and view all the answers

    Which host is responsible for the transmission of Dicrocoelium dendriticum?

    <p>Ant</p> Signup and view all the answers

    What is the characteristic of the egg of Opistorchis felineus?

    <p>Operculated and mature</p> Signup and view all the answers

    Which intestinal fluke is known to infect humans and is the largest fluke to do so?

    <p>Fasciolopsis buski</p> Signup and view all the answers

    What is the characteristic of the Echinostomids?

    <p>Horseshoe-shaped collar of spines</p> Signup and view all the answers

    What is the primary habitat of Echinostoma ilocanum?

    <p>Small Intestine</p> Signup and view all the answers

    What is the most common manifestation of Heterophyes infection?

    <p>Peptic ulcer disease</p> Signup and view all the answers

    Which of the following is a characteristic of Heterophyes heterophyes eggs?

    <p>Operculated and mature</p> Signup and view all the answers

    What is the reservoir host for Echinostoma ilocanum?

    <p>Rat</p> Signup and view all the answers

    What is the mode of transmission for Metagonimus yokogawai?

    <p>Ingestion of 2nd intermediate host</p> Signup and view all the answers

    What is the shape of Heterophyes heterophyes?

    <p>Teardrop-shaped</p> Signup and view all the answers

    What is the common name of the parasite Fasciola gigantica?

    <p>Tropical Liver Fluke</p> Signup and view all the answers

    What is the habitat of the parasite Clonorchis sinensis?

    <p>Bile duct and gallbladder</p> Signup and view all the answers

    What is the intermediate host of the parasite Fasciola hepatica?

    <p>Snail and kangkong</p> Signup and view all the answers

    What is the characteristic of the egg of Fasciola gigantica?

    <p>Unembryonated and yellowish brown</p> Signup and view all the answers

    What is the effect of Clonorchis sinensis on the host?

    <p>All of the above</p> Signup and view all the answers

    What is the mode of transmission of Fasciola gigantica?

    <p>Ingestion of metacercaria from plants</p> Signup and view all the answers

    What is the characteristic shared by all trematodes except for Schistosomes?

    <p>They are hermaphroditic</p> Signup and view all the answers

    Which stage of the trematode life cycle is infective to the definitive host?

    <p>Cercaria</p> Signup and view all the answers

    What is the function of the sensory organs in the miracidium stage?

    <p>To locate and penetrate the snail host</p> Signup and view all the answers

    Which stage of the trematode life cycle is responsible for asexual reproduction?

    <p>Sporocyst</p> Signup and view all the answers

    What is the characteristic of the eggs of all trematodes except for Schistosomes?

    <p>They are operculated</p> Signup and view all the answers

    Which stage of the trematode life cycle is dormant and infective to the definitive host?

    <p>Metacercaria</p> Signup and view all the answers

    What is the first intermediate host in the trematode life cycle?

    <p>Snails</p> Signup and view all the answers

    What is the characteristic of the rediae stage?

    <p>It is a motile larva with a mouth and digestive system</p> Signup and view all the answers

    Which stage of the trematode life cycle is short-lived and uses cilia to swim?

    <p>Miracidium</p> Signup and view all the answers

    What is the starting point of the trematode life cycle?

    <p>Egg</p> Signup and view all the answers

    What is the habitat of Paragonimus westermani?

    <p>Lungs</p> Signup and view all the answers

    What is the infective stage of Paragonimus westermani?

    <p>Metacercaria</p> Signup and view all the answers

    What is the characteristic of the egg of Paragonimus westermani?

    <p>Operculated, immature/unembryonated</p> Signup and view all the answers

    What is the second intermediate host of Paragonimus westermani?

    <p>Crabs, crayfish, lobster</p> Signup and view all the answers

    What is the diagnosis of Paragonimus westermani based on?

    <p>Sputum and stool examination for eggs</p> Signup and view all the answers

    What is the name of the pancreatic fluke?

    <p>Eurytrema pancreaticum</p> Signup and view all the answers

    What is the common name of the parasite that causes Oriental Schistosomiasis or Katayama's Disease?

    <p>Oriental Blood Fluke</p> Signup and view all the answers

    Which species of Schistosoma is responsible for Urinary Bilharziasis?

    <p>Schistosoma haematobium</p> Signup and view all the answers

    What is the habitat of Schistosoma mansoni?

    <p>Inferior Mesenteric Vein of the Colon and the Rectum</p> Signup and view all the answers

    What is the characteristic shape of Schistosoma japonicum eggs?

    <p>With a small knob-like or small lateral spine</p> Signup and view all the answers

    What is the mode of transmission for all species of Schistosoma?

    <p>Skin Penetration</p> Signup and view all the answers

    What is the chronic infection outcome of Schistosoma japonicum?

    <p>Hepatic and Pulmonary Cirrhosis</p> Signup and view all the answers

    What is the intermediate host for Schistosoma mansoni?

    <p>Snail (Biomphalaria spp.)</p> Signup and view all the answers

    What is the characteristic of Schistosoma haematobium eggs?

    <p>Unoperculated embryonated (mature) with a prominent terminal spine</p> Signup and view all the answers

    What is the diagnostic method for Schistosoma haematobium?

    <p>Urine Sample Examination</p> Signup and view all the answers

    What is the pathogenesis of chronic Schistosoma haematobium infection?

    <p>Bladder Carcinoma, Obstructive Uropathies</p> Signup and view all the answers

    What is the shape of the female Schistosome?

    <p>Circular in section</p> Signup and view all the answers

    What is the infective stage of Schistosomes?

    <p>Cercaria</p> Signup and view all the answers

    How do Schistosomes penetrate the host?

    <p>Through skin penetration</p> Signup and view all the answers

    What is the laboratory diagnosis for Schistosomiasis?

    <p>Stool exam and urine analysis</p> Signup and view all the answers

    What is the confirmatory test for Schistosomiasis?

    <p>Circumoval Precipitin Test</p> Signup and view all the answers

    What is the treatment for Schistosomiasis?

    <p>Praziquantel</p> Signup and view all the answers

    What is the mode of transmission for S. haematobium?

    <p>Skin penetration</p> Signup and view all the answers

    What is the characteristic of Schistosomule?

    <p>Cercaria minus tail</p> Signup and view all the answers

    What is the antigen detection method for Schistosomiasis?

    <p>Circulating Cathodic Antigen (urine)</p> Signup and view all the answers

    What is the characteristic of the adult tapeworm?

    <p>Segmented and ribbon-like</p> Signup and view all the answers

    How do tapeworms absorb nutrients and eliminate waste?

    <p>Through the integument (body surface)</p> Signup and view all the answers

    What is the function of the scolex in a tapeworm?

    <p>To attach to the lining of the small intestine</p> Signup and view all the answers

    What is the first stage in the life cycle of a tapeworm?

    <p>Egg</p> Signup and view all the answers

    What is the role of the oncosphere?

    <p>To burrow through the wall of the intermediate host</p> Signup and view all the answers

    What is the region of growth in a tapeworm?

    <p>Neck</p> Signup and view all the answers

    How does the tapeworm obtain nutrients?

    <p>Through the integument (body surface)</p> Signup and view all the answers

    What is the function of the uterine pore?

    <p>Where egg exits</p> Signup and view all the answers

    What is the characteristic of the order Pseudophyllidean?

    <p>False Tapeworm</p> Signup and view all the answers

    What is the total life span of some tapeworms?

    <p>Up to 25 years</p> Signup and view all the answers

    What is the name of the species which may or may not require an intermediate host?

    <p>H.nana</p> Signup and view all the answers

    What is the site where the male and female reproductive organs meet?

    <p>Genital pore</p> Signup and view all the answers

    What is the term for the process where a proglottid is detached from the tapeworm?

    <p>Apolysis</p> Signup and view all the answers

    What is the term for the segments of the tapeworm body?

    <p>Proglottids</p> Signup and view all the answers

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