Schistosoma Life Cycle and Habitat
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Questions and Answers

What is the typical location of S.haematobium in the host?

  • Intestinal walls
  • Vessels of the bladder (correct)
  • Spleen
  • Blood vessels lining the liver

    • How long do female Schistosoma worms typically produce eggs after host infection?

  • 1-2 years
  • 25-30 days (correct)
  • 1-2 weeks
  • 3-6 months

    • What is the primary site of egg production in Schistosoma?

  • Liver
  • Intestinal walls
  • Blood vessels (correct)
  • Urinary bladder

    • Which species of snail is suitable for S.japonicum infection?

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

    What is the approximate length of adult Schistosoma worms?

    <p>10-20 mm</p> Signup and view all the answers

    What is the characteristic of the male Schistosoma worm?

    <p>It has a canal in which the female resides</p> Signup and view all the answers

    What is the duration and severity of lesions dependent on in schistosoma infections?

    <p>The length of cercaria stay in the dermis</p> Signup and view all the answers

    What is the mechanism of Katayama syndrome besides TH1 dominated response?

    <p>Formation of immune-complexes with soluble schistosoma Ag</p> Signup and view all the answers

    What is the characteristic of Cercariae dermatitis?

    <p>A temporary itchy maculopapular skin eruption</p> Signup and view all the answers

    What is the clinical feature of Katayama syndrome characterized by?

    <p>Fever, arthralgia, and vasculitic skin eruption</p> Signup and view all the answers

    What is the name of the reaction that occurs 4-8 weeks after schistosoma infection?

    <p>DTH reaction</p> Signup and view all the answers

    What is the result of the migration of parasites in bronchopneumonia?

    <p>Radiologically demonstrable pulmonary infiltrates</p> Signup and view all the answers

    What is a characteristic feature of S.mansoni eggs in faeces?

    <p>A lateral spine</p> Signup and view all the answers

    What is the primary goal of direct diagnosis in Schistosomiasis?

    <p>To find the living eggs or miracidium</p> Signup and view all the answers

    What is a common symptom of cerebral dx caused by Schistosomiasis japonicum?

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

    Which of the following is NOT a differential diagnosis for Schistosomiasis?

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

    What is the recommended time for collecting urine sediment for microscopy?

    <p>Between 10 am - 2 pm</p> Signup and view all the answers

    What is the purpose of indirect diagnosis in Schistosomiasis?

    <p>To detect circulating antischistosomal antibodies</p> Signup and view all the answers

    What is a possible manifestation of S. mansoni in the colon?

    <p>Papilloma-like growth</p> Signup and view all the answers

    What occurs in Symmer's pipe-stem fibrosis?

    <p>Gradual occlusion of intrahepatic portal veins</p> Signup and view all the answers

    Why is S. japonicum infection often more severe than S. mansoni infection?

    <p>The granuloma formed is usually larger</p> Signup and view all the answers

    What is a possible neurological complication of schistosomiasis?

    <p>Transverse myelitis</p> Signup and view all the answers

    What is Katayama fever?

    <p>An initial illness caused by S. japonicum</p> Signup and view all the answers

    Where can ectopic worms be found in the CNS in heavy schistosomiasis infestation?

    <p>Paravertebral venous plexus or cerebral cortical veins</p> Signup and view all the answers

    Which of the following is a characteristic of S.hematobium eggs?

    <p>They have a terminal spine</p> Signup and view all the answers

    What is the main advantage of using Praziquantel in the treatment of Schistosomiasis?

    <p>It is cheap and easy to administer</p> Signup and view all the answers

    What is the primary goal of health education in the prevention of Schistosomiasis?

    <p>To reduce contact with contaminated water</p> Signup and view all the answers

    What is the characteristic of S.japonicum eggs?

    <p>They have a lateral knob</p> Signup and view all the answers

    What is the main consequence of Schistosomiasis infection in the 13-year-old boy?

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

    What is the infectious form of Schistosoma?

    <p>Fork-tailed cercaria</p> Signup and view all the answers

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