The different kinds of reactions that can be measured (antibodies)

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The following is the main thing I wanted you to see

from the last link. These are what the tests measure.

IgA 2 Found in mucosal areas, such as the gut,

respiratory tract and urogenital tract, and prevents

colonization by pathogens.[9] Also found in saliva,

tears, and breast milk.

IgD 1 Functions mainly as an antigen receptor on B

cells that have not been exposed to antigens.[10] Its

function is less defined than other isotypes.

IgE 1 Binds to allergens and triggers histamine

release from mast cells and basophils, and is involved

in allergy. Also protects against parasitic worms.[6]

IgG 4 In its four forms, provides the majority of

antibody-based immunity against invading pathogens.[6]

The only antibody capable of crossing the placenta to

give passive immunity to fetus.

IgM 1 Expressed on the surface of B cells and in a

secreted form with very high avidity. Eliminates

pathogens in the early stages of B cell mediated

(humoral) immunity before there is sufficient

IgG.[6][10]

Antibodies can come in different varieties

Arline

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