Microbiology Class Notes 3 December 2007

Microbiology Class Notes 3 December 2007 - Microbiology...

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Microbiology Class Notes 3 December 2007 The two branches or immunity are Humoral and Cell-mediated. Humoral immunity is B- Cell dependent and antibody mediated. Cell-mediated immunity is T-Cell dependent. Antigens, from the phrase “antibody generator”, are defined as any substances to which a lymphocyte responds. Antigens are also known as immunogens. The epitope is the region of the antigen recognized by immune system. Most antigens have multiple epitopes. Haptens are small molecules that, by themselves, do not elicit immune system responses. In order to become immunogenic, haptens must bind to larger molecules. Penicillin is an example of a hapten; penicillin binds to serum albumin to become immunogenic. Specific immunity may be defined as either natural or artificial and as active or passive. Natural active immunity is the response of an immune system to environmental antigens; it may be short or long term. Natural passive immunity is the transfer of immunity from one host to another; such as in
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Microbiology Class Notes 3 December 2007 - Microbiology...

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