Apr 13, 2023
Gell & coomb classification
Type I Hypersensitivity Early Phase
Type I Hypersensitivity Delayed Phase
Type I Hypersensitivity Examples
Type II Hypersensitivity Examples
Type III Hypersensitivity – Examples
Type IV Hypersensitivity – Examples
When inappropriate immunologic responses occur in response to an antigen or allergen, they are known as hypersensitivity reactions.
. What is the special stain for mast cells and basophils?
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Difference between Anaphylaxis and Anaphylactoid
Mechanisms Opsonization and Phagocytosis Antibody and antigen reactionsIgG will opsonize it, and phagocytosis will occur. ADCC Once the antigen is covered with IgG, it will be identified by NK cells and macrophage and all resulting in ADCC (Antibody dependent cellular cytotoxicity.) Complement activation and inflammation Antigen and antibody reactions activate the complement system.
Ques. A 30-year-old HBsAg positive female complaints of feeling generally ill and fatigued, having fever, and loss of appetite and weight loss. Occasional episodes of muscle and or joint pains are reported. On GPE, the skin sores are noted. There is no cardiopulmonary discomfort noted. Her BP is raised. On arteriography, irregular narrowing and dilation of the blood vessels is noted. Biopsy of the vessels show fibrinoid necrosis. Which of the following hypersensitivity reactions play a role in this disease?
Ans -Type III
Ques. A 42-year-old patient presents with cough and sputum. He also complains of weight loss, fever, and night sweats. On sputum examination, there are multinucleated giant cells along with lymphocytes , and macrophages. Numerous scattered cells with slipped shaped nuclei are noted. Which of the following hypersensitivity reactions play a role in this disease?
Ans- Type IV
And that is it! You have read everything you need to know about Hypersensitivity reactions and its types for your Pathology paper. For more interesting and informative posts like this, download the PrepLadder App and keep reading our blog!
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