The Calgary Guide to Understanding Disease @TheCalgaryGuide
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Type IV Hypersensitivity: Pathogenesis and clinical findings
Definition: Unique because it is entirely T-Cell mediated; exposure to
causes development ... of allergen-specific ... Allergic reaction ... Stevens-Johnson Syndrome ... #Immunology #pathophysiology
Type I Hypersensitivity: Pathogenesis and clinical findings
Definition: Production of lgE Antibodies that bind to harmless allergens
leading to an allergic ... Sensitization" to Allergen ... Initial exposure to allergen ... after clearance of allergen ... #Immunology #pathophysiology
Type III Hypersensitivity: Pathogenesis and clinical findings
Definition: Small antigen-antibody complexes (produced from normal immune response to
self-antigens are the cause ... antigens are the cause ... HypersensitivityReaction #Allergy ... #Immunology #pathophysiology
Hypersensitivity: Summary
Type I Hypersensitivity:
 • Immunological Mediator: lgE
 • Immunological Target: Allergen Molecules
 • Ex: Antibiotic
Immunological Target: Allergen ... fever, Urticaria, Allergic ... Stevens-Johnson Syndrome ... #Allergic #Reactions ... Classification #Diagnosis
Anaphylaxis: Signs and Symptoms
Anaphylaxis: when any egg of three conditions is met:
1. Acute onset of skin/mucosal
exposure to a likely allergen ... exposure to known allergen ... #Anaphylaxis #pathophysiology ... #immunology #diagnosis
Anaphylaxis: Treatments (Acute)
Additional Info:
 • IV steroids may be considered for prevention of late phase reactions.
provided, as well as allergy ... Treatments #Management #pathophysiology ... #immunology
Type II Hypersensitivity: Pathogenesis and clinical findings
Definition: When antigens bind to the body's cell surfaces, forming
HypersensitivityReaction #Allergy ... #Immunology #pathophysiology
Selective Serotonin Reuptake Inhibitors: Mechanisms and Side Effects
 • Serotonin Syndrome:
   - Autonomic Hyperactivity:
• Serotonin Syndrome ... SSRI Withdrawal Syndrome ... Dizziness - Nausea ... Serotonin #Inhibitors #Pathophysiology ... SideEffects #Psychiatry #Diagnosis
Anticonvulsants as Mood Stabilizers: Mechanism and Side-effect
Examples: Valproate, Carbamazepine, Lamotrigine
 • Mild anticholinergic effect -> Drowsiness
constipation • Allergic ... Stevens-Johnson Syndrome ... Systemic effect -> Nausea ... #SideEffects #Pathophysiology
Serotonin-Norepinephrine Reuptake Inhibitors(SNRIs): Mechanisms and Side Effects

Withdrawal: Dizziness, Diarrhea, Insomnia, Nausea, Vomiting
Serotonin Syndrome - Potentially Life
Diarrhea, Insomnia, Nausea ... Vomiting Serotonin Syndrome ... gain Incr NE: Nausea ... SerotoninNorepinephrine #Inhibitors #Pathophysiology ... SideEffects #Psychiatry #Diagnosis