Bancroftian Filariasis Quiz
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Questions and Answers

What is the typical size range of B. malayi?

  • 200-280 μm long (correct)
  • 400-450 μm long
  • 100-150 μm long
  • 300-350 μm long
  • Where is B. malayi primarily endemic?

  • North America
  • Eastern Europe
  • Philippines and Indonesia (correct)
  • Australia
  • What characterizes the tail of B. malayi?

  • It has no distinct structure.
  • It is segmented.
  • It has a single nucleus.
  • The nuclei tend to bulge around the tail. (correct)
  • What type of symptoms are commonly associated with B. malayi infections?

    <p>Frequently asymptomatic, even with microfilariae present. (C)</p> Signup and view all the answers

    Which animals, besides humans, can be infected by B. malayi?

    <p>Felines and monkeys (B)</p> Signup and view all the answers

    What is a suspected reason for the absence of microfilariae in the blood of infected patients?

    <p>Microfilariae remain hidden deep in the lungs. (C)</p> Signup and view all the answers

    What does the successful resolution of symptoms after DEC therapy indicate?

    <p>An inflammatory response related to the filarial parasite. (B)</p> Signup and view all the answers

    What primarily determines the regions where B. malayi may be found?

    <p>Locations where mosquitoes breed (D)</p> Signup and view all the answers

    What is the average size of Hymenolepis diminuta eggs?

    <p>55 by 85 μm (A)</p> Signup and view all the answers

    Which of the following describes the embryophore of Hymenolepis diminuta?

    <p>Present; colorless (C)</p> Signup and view all the answers

    What characteristic is absent in Hymenolepis diminuta eggs?

    <p>Polar filaments (C)</p> Signup and view all the answers

    How many pairs of hooklets are present in a hexacanth embryo of Hymenolepis diminuta?

    <p>Three pairs (D)</p> Signup and view all the answers

    What is a common associated disease with Hymenolepis diminuta?

    <p>Hymenolepiasis (C)</p> Signup and view all the answers

    What is the primary symptom associated with the initial bite from L. loa?

    <p>Localized pain (D)</p> Signup and view all the answers

    When is the best time to collect blood samples for recovering L. loa microfilariae?

    <p>Midday, between 10:15 AM and 2:15 PM (A)</p> Signup and view all the answers

    What is the treatment of choice for adult L. loa worms?

    <p>Surgical removal (A)</p> Signup and view all the answers

    What occurs at the site of initial discomfort after infection with L. loa?

    <p>Calabar swellings (C)</p> Signup and view all the answers

    What is the approximate size range of adult O.volvulus worms?

    <p>150-355 μm long (A)</p> Signup and view all the answers

    What laboratory technique is used for the recovery of L. loa microfilariae?

    <p>Giemsa-stained blood (A)</p> Signup and view all the answers

    Which medication is known to be effective for treating L. loa?

    <p>Diethylcarbamazine (DEC) (C)</p> Signup and view all the answers

    Where are the microfilariae of O.volvulus primarily found?

    <p>In subcutaneous tissue (C)</p> Signup and view all the answers

    What is a characteristic of the microfilariae that helps in their identification?

    <p>Absence of a sheath (B)</p> Signup and view all the answers

    What complication might arise from the migration of adult L. loa worms?

    <p>Vision loss (A)</p> Signup and view all the answers

    Which species serves as the vector for O.volvulus infection?

    <p>Simulium blackfly (B)</p> Signup and view all the answers

    What condition is indicated by the presence of eosinophilia in L. loa infection?

    <p>Parasitic infection (A)</p> Signup and view all the answers

    In which regions is O.volvulus primarily distributed?

    <p>Equatorial Africa and Central America (D)</p> Signup and view all the answers

    What is the clinical condition associated with O.volvulus infection?

    <p>Onchocerciasis: River Blindness (B)</p> Signup and view all the answers

    What is the typical length of adult female O.volvulus worms?

    <p>500 mm (C)</p> Signup and view all the answers

    What type of laboratory diagnosis is used to detect O.volvulus?

    <p>Skin snips (D)</p> Signup and view all the answers

    What stage does the oncosphere convert into after migrating via the blood to animal tissue?

    <p>Cysticercus larval stage (D)</p> Signup and view all the answers

    What primarily correlates with the distribution of T.saginata and T.solium?

    <p>Sanitary conditions of inhabitants (D)</p> Signup and view all the answers

    Which species of Taenia requires a pig as an intermediate host?

    <p>T.solium (B)</p> Signup and view all the answers

    What is the average size of T.saginata as stated?

    <p>17.5 by 5.5 mm (A)</p> Signup and view all the answers

    What are common symptoms of Taenia infection?

    <p>Nausea, dizziness, and vomiting (B)</p> Signup and view all the answers

    What is the typical prognosis for those infected with Taenia spp.?

    <p>Good, with low risk of complications (C)</p> Signup and view all the answers

    Which of the following is NOT a typical symptom of Taeniasis?

    <p>Weight gain (C)</p> Signup and view all the answers

    Which condition is often revealed by laboratory tests in Taenia-infected patients?

    <p>Moderate eosinophilia (D)</p> Signup and view all the answers

    What is critical for the treatment of Taenia infections?

    <p>Total eradication of the scolex (D)</p> Signup and view all the answers

    Which drug is primarily effective against adult Taenia worms?

    <p>Praziquantel (A)</p> Signup and view all the answers

    Which of the following treatments is not recommended when there is CNS involvement?

    <p>Praziquantel (A)</p> Signup and view all the answers

    What should be emphasized to prevent Taenia infections?

    <p>Maintaining proper sanitation practices (D)</p> Signup and view all the answers

    Which species of Taenia can result in multiple adult infections in a single host?

    <p>T.asiatica (A)</p> Signup and view all the answers

    What symptom is commonly associated with Taenia infections?

    <p>Abdominal pain (A)</p> Signup and view all the answers

    What larval form of Taenia is ingested to initiate an infection?

    <p>Cysticercus larva (B)</p> Signup and view all the answers

    How do T.saginata and T.solium primarily differ in their infection characteristics?

    <p>Egg morphology and number of uterine branches (B)</p> Signup and view all the answers

    Study Notes

    Filariae

    • Focus is on morphology and life cycle, laboratory diagnosis, pathogenesis, and clinical symptoms of filarial nematodes
    • Filariae are classified into: Wuchereria bancrofti, Brugia malayi, Loa loa, and Onchocerca volvulus.
    • Calabar swelling, diurnal, elephantiasis, filaria (pl. filariae), filarial, microfilaria (pl. microfilariae), nematode (pl. nematodes), nocturnal, occult, periodicity, sheath, subperiodic, and vector (pl. vectors) are key terms defined.
    • Geographic distribution of each filarial is described
    • Common name associated with each filarial is provided
    • Identification of filarial parasites from a list
    • Brief description of the life cycle for each filarial
    • Vectors responsible for filarial transmission are listed.
    • Populations prone to filarial infection and associated clinical symptoms are identified.
    • Disease conditions, prognosis, treatment options, and prevention/control measures specific to each filarial are explained.
    • Significance of collection time for filarial recovery is detailed.
    • How to correctly identify filarial parasites from a photomicrograph, description, and/or diagram.

    Other Filarial Organisms

    • Mansonella ozzardi and Mansonella perstans are additional filarial organisms.
    • Descriptions of organisms, such as morphology, are included.

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    Filariae 3 PDF

    Description

    Test your knowledge on Bancroftian filariasis, specifically focusing on the characteristics, endemic regions, and symptoms related to B. malayi. Explore the infection's impact on both humans and other animals, as well as treatment outcomes. This quiz will help deepen your understanding of this important tropical disease.

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