Allergies and autoimmunity are conditions related to the immune system. They occur when antigens activate immune cells. Allergies and autoimmune diseases follow a similar developmental way, though...
Category: Immunology
Hypersensitivity Type III: Mechanisms and Clinical Manifestations
Type III hypersensitivity reaction is an abnormal immune response mediated by the formation of antigen-antibody complexes or immune complexes. In general, hypersensitivity means an inappropriate or...
Hypersensitivity Type IV: Mechanism and Clinical Manifestation
Hypersensitivity is a body’s response to a particular substance in an exaggerated way, which does not happen in normal cases. Hypersensitivity type IV is different from the rest of the other types...
Hypersensitivity Type II: Mechanism and Clinical Manifestation
Unlike Type I hypersensitivity, Type II hypersensitivity reaction is an immediate reaction, showing a "hyper" or exaggerated response to harmless antigens within 24 hours. Type II hypersensitivity...
Hypersensitivity Type I: Mechanism and Clinical Manifestation
Various diseases result from inappropriate and immediate immune responses to common environmental components which are otherwise not harmful. Scientists Coombs and Gell have classified such responses...
Pregnancy Diagnostic Tests: Principle, Procedure, and Results
Most of the laboratory tests for pregnancy are based on detecting the presence of human chorionic gonadotropins (hCG) in the woman's urine. The hCG (human chorionic gonadotropin) is secreted by...