21 Questions
Which type of hypersensitivity reaction involves T cells and is often referred to as delayed-type hypersensitivity?
Type IV
Which type of hypersensitivity reaction is mediated by IgE and involves immediate allergic responses like anaphylaxis?
Type I
Which condition is an example of Type III hypersensitivity reaction?
Systemic Lupus Erythematosus (SLE)
Which test is used to detect Type IV hypersensitivity reactions and is commonly used in the diagnosis of tuberculosis?
Patch test
Which skin response is associated with chronic granulomas in Type IV hypersensitivity reactions?
Contact dermatitis
Which type of hypersensitivity reaction involves the deposition of immune complexes and often leads to conditions like serum sickness?
Type III
What is the main characteristic of Type IV Delayed-Type Hypersensitivity?
No immediate reaction
In a Tuberculin-Type Hypersensitivity reaction, the immune response is directed against which type of antigen?
Tuberculin proteins
Contact Hypersensitivity typically results in which of the following?
Delayed inflammatory response
What is a characteristic feature of Chronic Granulomas in hypersensitivity reactions?
Long-term inflammation
What is the mechanism of Skin Tests used to diagnose hypersensitivity reactions?
Localized antigen exposure on the skin
Which component is NOT typically involved in Type IV Delayed-Type Hypersensitivity reactions?
IgE antibodies
What is the major mechanism of defense against various intracellular pathogens in Type IV Delayed-Type Hypersensitivity?
Formation of chronic granulomas
Which substance is most frequently encountered in Contact Hypersensitivity?
Nickel (jewelry)
What is the typical clinical response seen in Contact Dermatitis due to Contact Hypersensitivity?
Infiltration of superficial dermis with basophils
Which type of hypersensitivity is responsible for elimination of tumor cells bearing neoantigens?
Granulomatous hypersensitivity
What is the main clinical manifestation of Jones-Mote hypersensitivity?
Infiltration of superficial dermis with basophils
Which type of hypersensitivity results in tuberculoid leprosy?
Tuberculin-type hypersensitivity
What is the characteristic feature of Type IV Delayed-Type Hypersensitivity reactions upon re-exposure to an antigen?
Chronic granuloma formation
What is the notable defense mechanism against various intracellular pathogens like fungi seen in Type IV Delayed-Type Hypersensitivity?
Granulomatous hypersensitivity
What does exposure to thermophilic Actinomyces species found in moldy hay result in?
Farmer's lung
Test your knowledge on common intradermal tests used for diagnosing diseases such as tuberculosis, histoplasmosis, and allergies. Learn about tests like Mantoux for tuberculosis, Frei test for LGV, and Casoni test for Hydatid disease.
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