Allergic Contact Dermatitis Immunology Quiz
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Questions and Answers

What is the main immune mechanism involved in Cell-Mediated (Delayed) Hypersensitivity?

  • Antibody production
  • Interaction between sensitized T lymphocytes & specific antigens (correct)
  • Complement activation
  • B lymphocyte proliferation
  • Which type of T lymphocytes are involved in activating macrophages during Cell-Mediated (Delayed) Hypersensitivity?

  • CD4+ Th2 cells
  • CD4+ Treg cells
  • CD4+ Th1 cells (correct)
  • CD8+ CTLs
  • Which of the following microbes is NOT a major immune response target in delayed type hypersensitivity reactions?

  • Measles virus
  • Mycobacterium T.B.
  • Streptococcus pyogenes (correct)
  • Leishmania species
  • What is the time frame for the development of Cell-Mediated (Delayed) Hypersensitivity reactions?

    <p>Within 1-2 days</p> Signup and view all the answers

    Which component plays NO role in Cell-Mediated (Delayed) Hypersensitivity reactions?

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

    What is the main function of CD8+ CTLs in Cell-Mediated (Delayed) Hypersensitivity?

    <p>Directly kill infected cells</p> Signup and view all the answers

    What type of cells are involved in the immunological features of Allergic contact dermatitis?

    <p>Langerhans cells</p> Signup and view all the answers

    Which type of hypersensitivity reaction is indicative of Allergic contact dermatitis?

    <p>Type 4 HS</p> Signup and view all the answers

    How is the diagnosis of Allergic contact dermatitis confirmed?

    <p>History and patch test</p> Signup and view all the answers

    What is the characteristic feature of the acute form of allergic contact dermatitis?

    <p>Erythema, oedema, vesiculation</p> Signup and view all the answers

    Which parts of the body can provide a clue for diagnosing Allergic contact dermatitis based on the site of the lesion?

    <p>Ear lobes, around neck, wrist</p> Signup and view all the answers

    What is the main purpose of a patch test in diagnosing Allergic contact dermatitis?

    <p>To place a low dose of suspected Ag(s) on the skin</p> Signup and view all the answers

    What is the main cause of allergic contact dermatitis?

    <p>Contact with sensitizing substances or antigens</p> Signup and view all the answers

    Which of the following is NOT a common substance that can cause allergic contact dermatitis?

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

    In allergic contact dermatitis, haptens can complex with skin proteins leading to:

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

    Which of the following groups of people are more likely to experience anergy in the context of allergic contact dermatitis?

    <p>Individuals with immunosuppressive illnesses</p> Signup and view all the answers

    Which of the following is NOT a common plant that can cause allergic contact dermatitis?

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

    What type of molecules are many substances that cause allergic contact dermatitis?

    <p>Haptens that complex with skin proteins</p> Signup and view all the answers

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