In this article we will discuss about the resistance of human body against foreign agents. While the innate non-specific defense mechanisms are present in the body since birth, the acquired resistance develops in the body only in response to a foreign agent. Such resistance is effective only against the agent which evokes the response and not to other agents. Thus, [...]
The following points highlight the three main types of serological reactions that occur in human body. The types are: 1. Neutralization 2. Precipitation 3. Agglutination. Serological Reaction: Type # 1. Neutralization: Neutralization is a type of serological reaction which occurs between a toxin and its antibody (antitoxin) or between a virus and its antiserum. The reaction is so named, because [...]
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 [...]