HYPERSENSITIVITY
CLASSICAL ALTERNATE AND LECTIN PATHWAYS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Type I
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Type II
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Type III
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Type IV
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Detailed explanation-1: -Type IV HS is immunopathological damage that occurs at about 24–72 hours after exposure of a sensitized individual to an antigen (hence, “delayed-type” hypersensitivity or DTH).
Detailed explanation-2: -Type II hypersensitivity reaction refers to an antibody-mediated immune reaction in which antibodies (IgG or IgM) are directed against cellular or extracellular matrix antigens, resulting in cellular destruction, functional loss, or damage to tissues. Damage can occur through multiple mechanisms.
Detailed explanation-3: -Type I hypersensitivity occurs as a result of exposure to an antigen. The response to the antigen occurs in two stages: the sensitization and the effect stage. In the sensitization stage, the host experiences an asymptomatic contact with the antigen.