Chapter 21 Slide

Chapter 21 Slide - BIO 205 Chapter 21 Immunity and Serology...

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BIO 205 Chapter 21
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Immunity and Serology
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Immunity to Disease Acquired Immunity Can Result by Actively Producing Antibodies to an Antigen Active immunity occurs when the body’s immune system responds to antigens by producing antibodies and lymphocytes Naturally acquired active immunity follows illness or pathogen exposure
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Artificially acquired active immunity occurs through vaccination Vaccines contain treated or altered microbes, toxins, or parts of microbes a primary immune response occurs memory cells are formed the person does not usually become ill
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There Are Several Types of Vaccine Strategies 1. Live, attenuated vaccines contain weakened microbes that multiply at only low levels, inducing a strong immune response. Organisms can revert to a virulent form and cause disease A single-dose vaccine can combine vaccines for different diseases Vaccines using attenuated bacteria are difficult and not widely used
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2. Inactivated vaccines contain killed pathogens, which induce a weaker immune response Booster shots are required to maintain immunity They are safer than attenuated vaccines because
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This note was uploaded on 04/17/2009 for the course MIC 201 taught by Professor Lacroix during the Spring '08 term at Rhode Island.

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Chapter 21 Slide - BIO 205 Chapter 21 Immunity and Serology...

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