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  2. Selective immunoglobulin A deficiency - Wikipedia

    en.wikipedia.org/wiki/Selective_immunoglobulin_A...

    People with this deficiency lack immunoglobulin A (IgA), a type of antibody that protects against infections of the mucous membranes lining the mouth, airways, and digestive tract. It is defined as an undetectable serum IgA level in the presence of normal serum levels of IgG and IgM, in persons older than 4 years. It is the most common of the ...

  3. Hypogammaglobulinemia - Wikipedia

    en.wikipedia.org/wiki/Hypogammaglobulinemia

    Screening of immunoglobulin levels in relatives of CVID and IgA patients finds a familial inheritance rate of 10% to 20%. In cases where a carrier of such a mutation would like to have children, preimplantation genetic diagnosis (PGD) has been offered. [2] PGD is defined as the testing of pre-implantation stage embryos or oocytes for genetic ...

  4. Immunoglobulin A - Wikipedia

    en.wikipedia.org/wiki/Immunoglobulin_A

    Secretory IgA levels fluctuate diurnally, with the highest levels found in the small intestine and feces around ZT6, the middle of the light period. [18] The regulation of IgA secretion is related to the microbiota, and IgA is known to control specific members of oscillating microbes through direct interactions. [18]

  5. Dysgammaglobulinemia - Wikipedia

    en.wikipedia.org/wiki/Dysgammaglobulinemia

    Selective immunoglobulin A deficiency - Selective immunoglobulin A deficiency is classified as an IgA level below 7mg/dl (0.4375 μmol/L) with normal levels of other immunoglobulins. Some people with selective immunoglobulin A deficiency are prone to infections and develop other autoimmune disorders such as lupus, celiac disease and ...

  6. Humoral immune deficiency - Wikipedia

    en.wikipedia.org/wiki/Humoral_immune_deficiency

    B cells low but present, but with reduction in 2 or more isotypes (usually IgG & IgA, sometimes IgM): common variable immunodeficiency (CVID), ICOS deficiency, CD19 deficiency, TACI (TNFRSF13B) deficiency, BAFF receptor deficiency. Normal numbers of B cells with decreased IgG and IgA and increased IgM: Hyper-IgM syndromes

  7. IgG deficiency - Wikipedia

    en.wikipedia.org/wiki/IgG_deficiency

    IgG deficiency is a form of dysgammaglobulinemia where the proportional levels of the IgG isotype are reduced relative to other immunoglobulin isotypes.. IgG deficiency is often found in children as transient hypogammaglobulinemia of infancy, which may occur with or without additional decreases in IgA or IgM.

  8. Common variable immunodeficiency - Wikipedia

    en.wikipedia.org/wiki/Common_variable...

    Common variable immunodeficiency (CVID) is an inborn immune disorder characterized by recurrent infections and low antibody levels, specifically in immunoglobulin (Ig) types IgG, IgM, and IgA. [2] Symptoms generally include high susceptibility to pathogens, chronic lung disease, as well as inflammation and infection of the gastrointestinal ...

  9. Wiskott–Aldrich syndrome - Wikipedia

    en.wikipedia.org/wiki/Wiskott–Aldrich_syndrome

    The diagnosis can be made on the basis of clinical findings, the peripheral blood smear, and low immunoglobulin levels. Typically, IgM levels are low, IgA levels are elevated, and IgE levels may be elevated; paraproteins are occasionally observed. [15] Skin immunologic testing (allergy testing) may reveal hyposensitivity.

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