Parasitology: Diseases Caused by Protozoa and Helminthes
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Questions and Answers

What is the common habitat of the adult worms of Wuchereria bancrofti?

  • Lymphatics of upper limbs, chest and abdomen
  • Lymphatics of lower limbs, groin and epididymes in males (correct)
  • Reticuloendothelial cells and monocytes
  • Bloodstream and lungs

    • What is the vector responsible for transmitting Leishmaniasis in the Old World?

  • Female Mansonia
  • Female sand fly, genus Phlebotomus (correct)
  • Female Culex pipiens
  • Female Anopheles mosquitoes

    • In which age group is Leishmania donovani commonly found?

  • Above 50 years
  • Between 10-25 years (correct)
  • Between 25-40 years
  • Below 4 years

    • What is the stage of the parasite responsible for transmission of Wuchereria bancrofti?

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

    What is the common manifestation of Wuchereria bancrofti infection in the lymphatics?

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

    Which of the following species of Plasmodium is found in subtropical zones?

    <p>Plasmodium malariae</p> Signup and view all the answers

    Which type of cells does P.ovale and P.vivax infect in the liver?

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

    What is the characteristic of the tail of the male worm in the adult stage of P.malaria?

    <p>Curved ventrally</p> Signup and view all the answers

    What is the characteristic of the microfilaria stage of the parasite?

    <p>Body has a loose sheath and graceful curves</p> Signup and view all the answers

    Which stage of the parasite is infective to humans?

    <p>Filariform larvae</p> Signup and view all the answers

    What is the mode of transmission of Leishmania?

    <p>Bite of infected female sand fly</p> Signup and view all the answers

    What is the characteristic of the anterior end of the microfilaria stage?

    <p>Rounded and free from nuclei</p> Signup and view all the answers

    What is the term given to the period from the entry of sporozoites in the liver to the invasion of RBCs by merozoites?

    <p>Parasitic incubation period</p> Signup and view all the answers

    What is the stage of the parasite when it feeds on the haemoglobin of the RBC?

    <p>Trophozoite stage</p> Signup and view all the answers

    What is the number of nucleus pieces that the trophozoite divides into?

    <p>6-36</p> Signup and view all the answers

    What is the function of the promastigotes in the sand fly?

    <p>To block the sucking apparatus</p> Signup and view all the answers

    What happens to the parasitized RBCs after the completion of a few schizogony cycles?

    <p>They rupture and release merozoites</p> Signup and view all the answers

    What is the fate of some merozoites after completing a few schizogony cycles?

    <p>They do not develop into schizonts but instead form male gametes</p> Signup and view all the answers

    What is the site where the cycle of sporogony takes place in the vector?

    <p>Stomach of the female Anopheles mosquito</p> Signup and view all the answers

    What are the parasite stages responsible for transmission of infection to the definitive host vector?

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

    What is the result of the immunological reaction in the symptomatic stage of the disease?

    <p>Recurrent attacks of lymphanginitis and lymphadenitis</p> Signup and view all the answers

    What happens to the parasite stages when the vector takes its blood meal?

    <p>All ingested parasite stages are digested</p> Signup and view all the answers

    What is the duration of the incubation period?

    <p>From the entry of the third stage infective larvae into the skin until the microfilariae first appear in the blood</p> Signup and view all the answers

    What is the characteristic of the affected lymph vessels in the inflammatory stage?

    <p>They appear as raised, red, hot, swollen, and tender streaks</p> Signup and view all the answers

    What is the characteristic sign seen in ultrasonography during the diagnosis of filariasis?

    <p>Filarial dance sign</p> Signup and view all the answers

    What is the time frame for taking a blood sample to detect microfilariae in peripheral blood?

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

    What is the purpose of the provocative test in the diagnosis of filariasis?

    <p>To facilitate the detection of microfilariae in blood when it is difficult to obtain a sample at night</p> Signup and view all the answers

    What is the name of the test used to detect antibodies in the diagnosis of filariasis?

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

    What is the characteristic feature of nodules in filariasis?

    <p>They never ulcerate</p> Signup and view all the answers

    What is the repeating pattern of the malarial paroxysm in P. falciparum?

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

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