The following points highlight the four important types of hypersensitivity. The types are: 1. Type I Hypersensitivity (Anaphylaxis) 2. Type II Hypersensitivity (Cytotoxic Hypersensitivity) 3. Type III Hypersensitivity 4. Type IV Hypersensitivity. 1. Type I Hypersensitivity (Anaphylaxis): This type of hypersensitivity is the most common among all the types. About 17% of the human population may be affected, probably due [...]
In this article we will discuss about the autoimmune and immunodeficiency disorders. Autoimmune Disorders: (i) Autoimmunity: A fundamental property of the immune system is its ability to recognize the body's own cells and the antigens present in them as self-antigens. Under normal conditions, the immune system does not attack self-antigens. This ability — tolerance, develops while the immune cells like [...]
In this article we will discuss about Immunity:- 1. Definition of Immunity 2. Determinants of Natural Immunity 3. Mechanism. Definition of Immunity: The term immunity (Lat. immunis—freed from homage, save from something) means resistance of the body to the pathogenic microbes, their toxins or to other kinds of foreign substances. In other words, it can be defined as the body's [...]