In this article we will discuss about the steps involved in cellular immune response. Host defenses that are mediated by antigen specific T-cells and various non-specific cells of the immune system is called cell mediated immune responses. Cellular immune responses have an activation phase and an effector phase. These phases occur as follows (Fig. 10.2): 1. A viral protein made [...]
In this article we will discuss about the active and passive immunity of cell-mediated. 1. Active Immunity: On the basis of immunity acquired, active immunity may be natural or artificial. i. Natural active immunity: It results from either a clinical or an in-apparent subclinical infection by a microbe after repeated exposure to small doses of the infecting organism, which passes [...]
In this article we will discuss about the features of adaptive immune responses. 1. Specificity: It ensures that distinct microbes elicit specific responses. It exists because individual lymphocyte expresses membrane receptors that are able to distinguish subtle differences in structure between different antigens. 2. Diversity: It enables immune system to respond to a large variety of microbes. The total no. [...]