Immunology Flashcards
The two most common causes of fatal anaphylaxis?
Injected penicillin
Bee and wasps stings
400-800 deaths annually in US attributed to anaphylaxis
Exaggerated response by immune system to foreign substance
Allergic Reaction
Principal body system involved in allergic reactions
Responsible for combating infection
Components found in blood, bone marrow, lymphatic system.
Immune system
Destruction or inactivation of pathogens, abnormal cells, foreign molecules such as toxins
Goals of immune response
Direct attack of foreign substance by specialized of immune system.
Cellular immunity
Chemical attack of invading substance
Humoral immunity
Principal chemical agents of this attack are?
Antibodies
Antibodies are manufactured by specialized cells of immune system called
B cells
Humoral immune response begins with exposure of body
Antigen
Any substance capable of inducing a immune response
Antigen
Inital response to antigen
Several days are required before both cellular and humoral components of immune system respond
Primary response
Antibodies specific for offending antigen.
Antigen specific antibodies more effective
Secondary exposure
Inital exposure of individual to antigen ; results in immune response
Allergies
Most common cause of fatal anaphylaxis
Parentereal penicillin
Second most frequent cause of fatal anaphylaxis
Insect stings
IgE release histamine, heparin and other substances
De granulation
Principal chemical mediator of allergic reaction is
Histamine (
Potent substance which causes bronchoconstriction , increased intestinal motility, vasodilation, increased vascular permeability
Histamine
Cardiovascular Respiratory GI And the skin Are?
Principal body systems affected by anaphylaxis
End tidal CO2 level may climb due to development of both ?
Respiratory and metabolic acidosis
Cellular immunity
Involves direct attack of the foreign substance by specialized cells of the immune system.
these cells physically engulf and deactivate or destroy offending agent
Humoral immunity
Chemical attack of the invading substance
*The principal chemical agents of this attack are antibodies, also called immunoglobulin
Sensitization
The initial exposure of an individual to an antigen
Drugs Food and food additives Animals Insects (Hymenoptera stings) and insect parts Fungi and molds Radiology contrast materials
Common allergies