immunity · 2019. 5. 12. · understand that active immunity may be acquired through natural...
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IMMUNITYINFECTIOUS DISEASES
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Know that exposure to an antigen is required for acquiredimmunity. This may be acquired through passive or activeprocesses.
Understand that passive immunity may be acquired frommaternal antibodies or antibody serum.
Understand that active immunity may be acquired throughnatural exposure to a pathogen or through vaccination.
Overview
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The adaptive (acquired) immune system is the third line ofdefence when fighting an infection.
To acquire immunity, we must be exposed to an antigen.We can acquire immunity passively or actively.
Immunity
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Immunity
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INTENDED STUDENT LEARNING
Know that exposure to an antigen is required for acquired immunity. This may be acquired through
passive or active processes.
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Passive immunity results from the acquisition of antibodiesfrom another source and hence memory cells are notdeveloped.
Passive Immunity
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Natural: Receiving antibodies from another organism
eg: to the foetus via the colostrumor a newborn via breastmilk
Artificial: Receiving manufactured antibodies via externaldelivery
eg: blood transfusions of antibodies
Examples of Passive Immunity
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Examples of Passive Immunity
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INTENDED STUDENT LEARNING
Understand that passive immunity may be acquired from maternal antibodies or antibody serum.
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Active immunity involves the production of antibodies by thebody itself and the subsequent development of memory cells.
Active Immunity
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Natural: Producing antibodies in response to exposure to apathogenic infection.
ie: challenge and response (Influenza)
Artificial: Producing antibodies in response to the controlledexposure to an attenuated pathogen
ie: vaccination
Examples of Active Immunity
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Examples of Active Immunity
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INTENDED STUDENT LEARNING
Understand that active immunity may be acquired through natural exposure to a pathogen or through
vaccination.
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Homework
Independent content revision