The Calgary Guide to Understanding Disease @TheCalgaryGuide
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IgA Vasculitis – Henoch Scholein Purpura: Pathogenesis and Clinical Findings

 - Infectious Agents - 50% have
IgA Vasculitis – ... Activation of complement ... Leukocytoclastic vasculitis ... Cutaneous small vessel vasculitis ... #Pathophysiology
Inflammatory Cascade: Pathogenesis and Clinical Findings
Continued Innate Immunity
 • Phagocytosis: (main mechanism) neutrophils and macrophages engulf
dead tissue • Complement ... activation of complement ... #Inflammation #pathophysiology ... #immunology
Type II Hypersensitivity: Pathogenesis and clinical findings
Definition: When antigens bind to the body's cell surfaces, forming
autoimmune antibodies (IgG ... , rarely IgM) against ... activates the complement ... HypersensitivityReaction #Allergy #Immunology ... #pathophysiology
Humoral Immunity - Pathogenesis and Clinical Findings
Antigens (Ag) are produced from pathogens (bacteria, viruses, fungi, parasites)
activation • Complement ... tagged with C3 complement ... proliferate and differentiate ... Humoral #Immunity #pathophysiology ... #immunology
C5-C9 Deficiency - Pathogenesis and Clinical Findings
Note:
 • Risk of invasive meningococcal disease is 1000-10000x higher
is rare Normal complement ... response: The complement ... activation -> Complement ... #pathophysiology ... #immunology
X-Linked Agammaglobulinemia: Pathogenesis and clinical findings
The epidemiology of this disease is 1/340,000 births and roughly double
undetectable levels of IgA ... , IgG, and IgM ... Agammaglobulinemia #XLinked #pathophysiology ... #immunology
Gonorrhea: Pathophysiology

 - Neonatal Transmission -> Direct contact of patient mucosa with mother's infected mucosa while
Gonorrhea: Pathophysiology ... activation of complement ... - Secretion of IgA ... #Gonorrhea #Pathophysiology