Hypersensitivity Archives

Hypersensitivity Type I, II, III and IV in one table

November 23, 2020June 22, 2018 by Sagar Aryal

Here is the comparison table: S.N. Character Type I Type II Type III Type IV 1 Alternative Name Allergic hypersensitivity Cytotoxic hypersensitivity Immune complex hypersensitivity Cell-mediated hypersensitivity/ Delayed type of hypersensitivity 2 Principle Antibody-mediated degranulation of granulocytes leading to the destruction of cells. Antibody-mediated destruction of healthy cells. Antigen-antibody complex-mediated destruction of cells. T lymphocytes mediated destruction of cells. 3 …

Type IV (Cell Mediated) Hypersensitivity- Mechanism and Examples

January 3, 2020June 11, 2018 by Sagar Aryal

Hypersensitivity refers to increased reactivity or exaggerated immune response of a host to an antigen to which it has been previously exposed. According to the most widely accepted classification of Gell and Coombs, there are four main types of hypersensitivity reactions as type I, II, III and IV. Type I, II and III are immunoglobulin-mediated (immediate) hypersensitivity reactions while type …

Type III (Immune Complex) Hypersensitivity- Mechanism and Examples

January 2, 2020June 9, 2018 by Sagar Aryal

The term hypersensitivity denotes a condition in which an exaggerated immune response of a host results in inappropriate reactions that leads to destruction of host tissues. According to the most widely accepted classification of Gell and Coombs, there are four main types of hypersensitivity reactions as type I, II, III and IV. Type I, II and III are immunoglobulin-mediated (immediate) …

Type II (Cytotoxic) Hypersensitivity- Mechanism and Examples

January 12, 2020June 8, 2018 by Sagar Aryal

Type 1 (Anaphylactic) Hypersensitivity Reaction

January 3, 2020June 5, 2018 by Sagar Aryal

Hypersensitivity is increased reactivity or increased sensitivity by the animal body to an antigen to which it has been previously exposed. The most widely adopted current classification is that of Coombs and Gellthat designates immunoglobulin-mediated (immediate) hypersensitivity reactions as types I, II, and III, and lymphoid cell-mediated (delayed-type) hypersensitivity/cell-mediated immunity as a type IV reaction. A hypersensitive response (HR) is …

What is Immunology?

January 12, 2020May 4, 2018 by Sagar Aryal

What is Immunology? Immunology is the study of how the body responds to foreign substances and fights off infection and other disease. Immunologists study the molecules, cells, and organs of the human body that participate in this response. Immunity Immunity is a condition of being able to resist a particular disease especially through preventing the development of pathogenic microorganism or …

Hypersensitivity- Introduction, Causes, Mechanism and Types

January 8, 2020March 12, 2018 by Sagar Aryal

Introduction Hypersensitivity is increased reactivity or increased sensitivity by the animal body to an antigen to which it has been previously exposed. The term is often used as a synonym for allergy, which describes a state of altered reactivity to an antigen. Hypersensitivity has been divided into categories based upon whether it can be passively transferred by antibodies or by …