Immunity Part 3

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Immunity Part 3

• Immunotherapy, or how to fool your immune system
  into protecting you!

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Active Immunity

• This is what you have when your B-memory and
  T-memory cells are waiting to encounter the same
  antigen again.
• You can cause this to happen by putting an
  antigen that will not cause harm into the body by
  vaccination

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Immunization

• Uses vaccines that have either the traditional
  dead pathogen or can now be made using a
  variety of biotechnological means.
• You can look for the presence of antibodies to
  determine if someone is protected against a
  specific disease
• Many vaccinations need two exposures to work,
  some may need more

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Passive Immunity

• When someone is sick, they can be given
  antibodies to boost the work their immune system
  is doing. (immunoglobulin)
• This is how breast milk protects babies during
  the first few months of life
• However, it does not last

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Allergies

• Caused by an overactive immune system
• Can be mild to deadly (anaphylactic shock)
• IgE antibodies stick on the membranes of
  basophils in blood and mast cell in tissue

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• When an allergen (antigen) attaches to IgE
  antibodies on mast cell, they release histamine
  and other chemicals
• Histamine caused mucus secretions and airway
  constrictions
• If the other chemicals get into the blood stream,
  the capillary permeability increases and that can
  lead to fluid loss and shock (or death)
• Fig. 13.12

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Immunosuppression

• After transplant killer T cells lyse the
  transplanted cells just as they would a bacterium
• Drugs can be given to suppress the rejection but
  it does increase the transplants chances of
  other infections

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Autoimmune Diseases

• When killer T cells attach body cells
• Depending on which cells are attached
• (Honors know the list on pg 267 both disease
  and symptoms)

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