Microbiology Test 3: Chapter 15, 16, 17, and 18
The first 2 lines of defense given before birth.
A generalized response to a wide variety of pathogens.
First Line of Defense
Barriers, phagocytes, extracellular killings, and complements.
Second Line of Defense
Interferons, defensins, inflammation, and fever.
The body's ability to recognize and defend against intruders and their products.
Naturally Acquired: Active
The body's natural defense against infections.
Naturally Acquired: Passive
Antibodies given to the fetus through the placenta.
Artificially Acquired: Active
Vaccines trigger immune responses.
Artificially Acquired: Passive
Antiseras and antitoxins are given to patients.
Antigens given in the fo/ated, inactivated, or toxoid vaccines
Administration of an antiserum containing preformed antibodies.
Type I Hypersensitivity
Immediate: IgE binds antigen causing degranulation
Type II Hypersensitivity
Cytotoxic: Antibodies and complement lyse target cells.
Type III Hypersensitivity
Immune-complex mediated: Nonphagocytized immune complexes trigger mast cell degranulization.
Type IV Hypersensitivity
Delayed: Tc cells attack the body's cells.
Response to the release of inflammatory molecules.
Antigens that trigger allergies.
Anti-inflammatories that kill T-cells.
Nonspecifically blocks cell division.
Blocks T-cell responses.
Kills T-cells nonspecifically and kills activated T-cells