Immunology: Hypersensitivity Overview
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Questions and Answers

What is the primary characteristic of Type I hypersensitivity?

  • It causes autoimmunity by targeting the body's own cells.
  • It is characterized by a delayed response to foreign agents.
  • It involves IgG antibodies activating the immune system.
  • It features an immediate allergic reaction mediated by IgE antibodies. (correct)
  • In which type of hypersensitivity do antibodies target specific tissues causing tissue damage?

  • Type III hypersensitivity
  • Type I hypersensitivity
  • Systemic Lupus Erythematosus
  • Type II hypersensitivity (correct)
  • What does Systemic Lupus Erythematosus (SLE) primarily affect?

  • Multiple body systems through autoimmune response (correct)
  • The digestive system exclusively
  • Only the skin and respiratory system
  • The nervous system and heart only
  • Which of the following is a common result of a cytotoxic reaction in Type II hypersensitivity?

    <p>Hemolytic disease of the newborn</p> Signup and view all the answers

    What is the primary difference between autoimmune disorders and immunodeficiency disorders?

    <p>Autoimmune disorders attack the body's own tissues, while immunodeficiency disorders are characterized by a lack of response to foreign agents.</p> Signup and view all the answers

    What is a common early symptom of SLE that resembles rheumatoid arthritis?

    <p>Joint Pain</p> Signup and view all the answers

    Which medication is used as an immunosuppressive agent in severe SLE cases?

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

    What is the characteristic rash referred to as the Butterfly Rash associated with?

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

    Which test is commonly used to measure inflammation in the body?

    <p>Erythrocyte Sedimentation Rate (ESR)</p> Signup and view all the answers

    What is proteinuria and in what condition is it typically present?

    <p>Presence of protein in urine, often seen in SLE exacerbation</p> Signup and view all the answers

    Which type of reaction occurs 48-72 hours after antigen exposure?

    <p>Delayed Type IV Reaction</p> Signup and view all the answers

    Which of the following is considered a risk factor for SLE?

    <p>Ethnicity, particularly among minorities</p> Signup and view all the answers

    What is a common long-term symptom experienced by SLE patients?

    <p>Chronic Pain</p> Signup and view all the answers

    What is a characteristic feature of Type IV Hypersensitivity?

    <p>Results from interactions between T-cells and antigens</p> Signup and view all the answers

    How long after exposure does a Type IV hypersensitivity reaction typically show a response?

    <p>48-72 hours after exposure</p> Signup and view all the answers

    What can result from continued macrophage activation in Type IV Hypersensitivity?

    <p>Granuloma formation and chronic inflammation</p> Signup and view all the answers

    What is the primary method used to test for a Type IV hypersensitivity reaction?

    <p>Purified Protein Derivative (PPD) test</p> Signup and view all the answers

    What is a common outcome of an acute systemic allergic reaction?

    <p>Anaphylaxis requiring immediate treatment</p> Signup and view all the answers

    What role do histamines play in allergic reactions?

    <p>Cause inflammation by acting on blood vessels</p> Signup and view all the answers

    What condition is characterized by wheezing and difficulty breathing due to chronic inflammation?

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

    What is the purpose of immunotherapy in allergic reactions?

    <p>Reduce allergic responses over time</p> Signup and view all the answers

    What is primarily involved in Type I hypersensitivity reactions?

    <p>Mast cells and IgE</p> Signup and view all the answers

    What typically defines a Type III hypersensitivity reaction?

    <p>Immune complexes deposited in tissues</p> Signup and view all the answers

    Which of the following is NOT a common symptom of Type I hypersensitivity?

    <p>Bloody urine</p> Signup and view all the answers

    Which treatment is recommended for a major blood transfusion reaction?

    <p>Call rapid response team</p> Signup and view all the answers

    What type of immune response is associated with Type IV hypersensitivity?

    <p>Delayed cell-mediated response</p> Signup and view all the answers

    Which of the following allergens is NOT commonly associated with Type I hypersensitivity?

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

    What is a goal of immunotherapy in managing allergies?

    <p>To create hypo-sensitization</p> Signup and view all the answers

    What happens in the body during an anaphylaxis reaction?

    <p>Histamine and other mediators are released</p> Signup and view all the answers

    In Type II hypersensitivity, what is primarily targeted?

    <p>Target cells affected by the antigen</p> Signup and view all the answers

    Which statement is true regarding allergic reactions as a person ages?

    <p>Allergic responses usually persist throughout life.</p> Signup and view all the answers

    What characterizes Type IV hypersensitivity in terms of T-cells?

    <p>They are responsible for delayed reactions.</p> Signup and view all the answers

    What is the mechanism behind serum sickness?

    <p>Deposition of immune complexes in tissues.</p> Signup and view all the answers

    Which is a common sign of Type I hypersensitivity?

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

    What is the role of antihistamines in treating hypersensitivity reactions?

    <p>They block histamine receptors.</p> Signup and view all the answers

    Which condition is primarily associated with the creation of autoantibodies that attack the patient's own cells?

    <p>Systemic Lupus Erythematosus</p> Signup and view all the answers

    What is a common manifestation of Systemic Lupus Erythematosus?

    <p>Joint pain</p> Signup and view all the answers

    Which demographic has the highest prevalence of Systemic Lupus Erythematosus?

    <p>Women of childbearing age</p> Signup and view all the answers

    Which diagnostic test is a specific indicator of Systemic Lupus Erythematosus?

    <p>Anti-DNA antibody testing</p> Signup and view all the answers

    What role do immunosuppressive agents play in the treatment of Systemic Lupus Erythematosus?

    <p>They increase the risk of infections.</p> Signup and view all the answers

    In systemic lupus erythematosus, the immune complexes are primarily deposited in which tissues?

    <p>Connective tissues</p> Signup and view all the answers

    What skin manifestation is often associated with Systemic Lupus Erythematosus?

    <p>Red butterfly rash</p> Signup and view all the answers

    What may happen to menstruation in women taking cyclophosphamide for Systemic Lupus Erythematosus?

    <p>Menstruation may cease entirely</p> Signup and view all the answers

    Which autoimmune disorder features hyperactivity of B cells as a contributing factor?

    <p>Systemic Lupus Erythematosus</p> Signup and view all the answers

    What is the normal range for erythrocyte sedimentation rate (ESR)?

    <p>15 - 30 mm/hr</p> Signup and view all the answers

    Which of the following is a nursing diagnosis for a patient with Systemic Lupus Erythematosus?

    <p>Risk for Ineffective Tissue Perfusion</p> Signup and view all the answers

    What is a recommended teaching point for patients on immunosuppressants?

    <p>Consult healthcare providers before getting immunizations.</p> Signup and view all the answers

    Which of the following is NOT a common nursing implementation for SLE patients?

    <p>Encourage sun exposure for vitamin D</p> Signup and view all the answers

    What potential complications arise from the use of high-dose corticosteroid therapy for SLE?

    <p>Reduced bone density and increased risk of fractures</p> Signup and view all the answers

    Study Notes

    Hypersensitivity

    • An overreaction of the immune system to foreign agents.
    • Systemic Lupus Erythematosus (SLE) is a chronic autoimmune disease affecting multiple body systems.
    • Immunocompromised systems are ineffective at protecting the body against infection.
    • Autoimmune disorders involve the immune system attacking the body's own tissues.
    • Immunodeficiency is when the immune system is unable to respond effectively.

    Type I Hypersensitivity

    • Immediate allergic reaction mediated by IgE antibodies.
    • Can be localized or systemic.
    • Antibodies bind to cells, releasing substances causing inflammation.
    • Examples include asthma, allergic rhinitis, and food allergies.

    Type II Hypersensitivity

    • Cytotoxic reaction targeting specific tissues.
    • Antibodies activate a system that causes tissue damage.
    • Examples include transfusion reactions, hemolytic disease of the newborn, and ABO incompatibility.

    Type III Hypersensitivity

    • Immune complex-mediated inflammation in tissues.
    • Immune complexes deposited in tissues causing inflammation.
    • Examples include serum sickness and acute glomerulonephritis.

    Type IV Hypersensitivity

    • Delayed cell-mediated immune response to antigens.
    • Cell-mediated immune response.
    • Antigen stimulates T-cells.
    • Examples include contact dermatitis, TB test, and GVH.

    Systemic Lupus Erythematosus (SLE)

    • An autoimmune disease affecting multiple body systems.
    • Involves the immune system attacking its own tissues.
    • Symptoms vary widely.

    SLE Risk Factors

    • Women of childbearing age
    • African Americans
    • Hispanics
    • Native Americans
    • Asians

    SLE Clinical Manifestations

    • Joint pain

    • Butterfly rash (red rash across cheeks and bridge of nose)

    • Diffuse skin rash

    • Early manifestations (mimic Rheumatoid Arthritis)

    • Anti-DNA antibodies (rarely found in other disorders)

    • Increased Erythrocyte Sedimentation Rate (ESR) - due to inflammation

    SLE Diagnostic Tests

    • CBC (Complete Blood Count) - can show anemia and/or leukopenia
    • Urinalysis - tests for proteinuria (protein in urine) during exacerbation of SLE when kidneys are involved

    SLE Drug Therapy

    • Anti-inflammatory drugs (hydroxychloroquine)
    • Corticosteroids (high doses initially, tapered as possible)
    • Immunosuppressive agents (cyclophosphamide, azathioprine)
    • Increased risk for infection and malignancy with immunosuppressant drugs.

    SLE - Immunosuppressant Agents

    • Increased risk of infection and malignancy

    SLE Nursing Assessment

    • Skin
    • Respiratory system
    • Musculoskeletal system
    • Neurological system
    • Gastrointestinal system
    • Psychosocial
    • Pain Assessment

    SLE - Nursing Diagnoses

    • Risk for infection
    • Ineffective tissue perfusion
    • Chronic pain
    • Risk for activity intolerance
    • Disturbed body image
    • Compromised family coping

    SLE - Nursing Implementations

    • Patient education about sun exposure
    • Strategies for rest and comfort
    • Frequent rest periods
    • encourage mobility
    • Maintain a healthy weight
    • Patient maintain a balanced healthy diet
    • Patient adheres to medications

    SLE - Nursing Evaluation

    • Weight maintenance
    • Healthy skin
    • balanced activity/rest
    • Compliance with medication regimen
    • Positive body image

    Type IV Hypersensitivity

    • Cell-mediated immune response.
    • No antibodies involved.
    • Results from exaggerated interaction between antigen and T cells.
    • Examples include PPD/TB skin test.

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    Description

    Test your knowledge on hypersensitivity and autoimmune disorders. This quiz covers the different types of hypersensitivity, including Type I, II, and III reactions, as well as their implications in diseases like Systemic Lupus Erythematosus. Explore how the immune system can sometimes overreact in harmful ways.

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