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 cell-mediated immunity. While humoral immunity protects the body from extracellular pathogenic agents and soluble antigens like toxins, cell-mediated immunity is directed against intracellular pathogens. The infected body cells are recognized by the immune cells and are destroyed. Also, abnormal body cells, like cancer cells, are recognized as non-self due to the presence of [...]
In this article we will discuss about the role of antibodies and antigens in humoral immunity. Role of Antibodies: Humoral immunity is antibody-mediated. It protects body from extracellular pathogenic agents by combining with them to form antigen-antibody complex, leading eventually to their elimination. The antibodies play at least in three different ways in this process of elimination of an antigenic [...]