The following points highlight the top three types of immunity found in humans. The types are: 1. Immunity in Bacterial Infections 2. Immunity in Viral Infections 3. Immunity to Protozoa and Helminthes. Immunity: Type # 1. Immunity in Bacterial Infections: (a) Antibody Mediated Immunity: Because of the production of the exotoxin, some microorganisms (i.e. Corynebacterium diphtheriae, Clostridium tetani, CI. welchii, [...]
In this article we will discuss about Hypersensitivity in human body:- 1. Meaning of Hypersensitivity 2. Forms of Hypersensitivity 3. Skin Tests. Meaning of Hypersensitivity: Von Pirquet coined originally the term allergy (grallos, altered, changed; ergon, action) to describe the altered reactivity of an animal after exposure to a foreign antigen. The allergy included both immunity and hypersensitivity. It is [...]
The following points highlight the top four types of hypersensitivity in human body. The types are: 1. Anaphylactic Reactions (Anaphylaxis) - Type I 2. Cytotoxic or Cytolytic Reactions- Type II 3. Toxic Complex Syndrome- Type III 4. Delayed Hypersensitivity. Hypersensitivity: Type # 1. Anaphylactic Reactions (Anaphylaxis) - Type I: If a guinea pig is injected with a small dose of [...]