58 results
Summary table of types of hypersensitivity reactions. 
Type 1
 - Mediators: lgE
 - Antigen Form: Soluble
Mediators: lgE - Antigen ... Form: Soluble antigen ... Form: Cell-bound antigen ... complex - Antigen ... Form: Soluble antigen
Hypersensitivity Types and Their Mechanisms
Type I - lgE - Soluble antigen
 - Allergen-specific lgE antibodies bind
lgE - Soluble antigen ... IgM - Cell-bound antigen ... binds to cellular antigen ... IgM - Soluble antigen ... - Antigen-antibody
Allergic Rhinitis: Pathogenesis and clinical findings

1. Allergy Sensitization -> Antigen Exposure -> APC (macrophages, HLA class
Sensitization -> Antigen ... class II) process antigen ... within 5 minutes of antigen ... by 15 minutes) Antigen ... Exposure -> Antigen
Type II Hypersensitivity: Pathogenesis and clinical findings
Definition: When antigens bind to the body's cell surfaces, forming
surfaces, forming an "antigen-surface ... Antigen binds receptor ... platelets) -> An "antigen-surface ... against either the antigen
Type IV Hypersensitivity: Pathogenesis and clinical findings
Definition: Unique because it is entirely T-Cell mediated; exposure to
Macrophage engulfs antigen ... -> Antigen presentation ... cells recognize antigen
Cellular and humoral immune responses of the adaptive immune system. Activated T cells accomplish cellular immune
Exogenous antigen ... only occurs when antigen ... is presented by antigen-presenting
Streptocccus Pneumoniae
Microbiology: Gram Positive, Alpha-hemolytic, Catalase Negative
Epidemiology - 10% adult carriers:
 • Most common cause of:
95%) • Urine antigen ... in CAP • Urine antigen
Asthma: immunopathogenesis. 
Allergens attach to, and are taken up by, dendritic cells that he the respiratory
the allergen (antigen ... ), antigen presenting
Hepatitis Virus Screening Algorithm
 - Hepatitis A Virus Antibody, IgM
 - Hepatitis B Virus Core Antibody,
Virus Surface Antigen
Type III Hypersensitivity: Pathogenesis and clinical findings
Definition: Small antigen-antibody complexes (produced from normal immune response to
Definition: Small antigen-antibody