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  2. Reference ranges for blood tests - Wikipedia

    en.wikipedia.org/wiki/Reference_ranges_for_blood...

    A reference range is usually defined as the set of values 95 percent of the normal population ... Serum levels: 70–79 years, non ... < 50 years: 0.35 [5] 1.9 [5] g/L

  3. Common variable immunodeficiency - Wikipedia

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

    Generally, people can be grouped as follows: no immunoglobulin production, immunoglobulin (Ig) M production only, or both normal IgM and IgG production. [23] Additionally, B cell numbers are also highly variable. 12% of people have no detectable B cells, 12% have reduced B cells, and 54% are within the normal range. [22]

  4. Dysgammaglobulinemia - Wikipedia

    en.wikipedia.org/wiki/Dysgammaglobulinemia

    IgG deficiency - IgG deficiency is a lack of IgG in the absence of other immunoglobulin deficiencies. IgG levels of 300–600 mg/dL show a mild to moderate reduction of IgG while levels below 200 mg/dl are classified as a severe deficiency. [6] Those with IgG deficiency often get chronic or reoccurring pyogenic respiratory tract infections. [7]

  5. List of primary immunodeficiencies - Wikipedia

    en.wikipedia.org/wiki/List_of_primary_immuno...

    Normal numbers of B cells with decreased IgG and IgA and increased IgM: Hyper-IgM syndromes; Normal numbers of B cells with isotype or light chain deficiencies: heavy chain deletions, kappa chain deficiency, isolated IgG subclass deficiency, IgA with IgG subclass deficiency, selective immunoglobulin A deficiency

  6. Primary immunodeficiency - Wikipedia

    en.wikipedia.org/wiki/Primary_immunodeficiency

    The basic tests performed when an immunodeficiency is suspected should include a full blood count (including accurate lymphocyte and granulocyte counts) and immunoglobulin levels (the three most important types of antibodies: IgG, IgA and IgM). [6] [5] Other tests are performed depending on the suspected disorder: [5] [6]

  7. 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 ...

  8. IgG deficiency - Wikipedia

    en.wikipedia.org/wiki/IgG_deficiency

    IgG1 is present in the bloodstream at a percentage of about 60-70%, IgG2-20-30%, IgG3 about 5-8 %, and IgG4 1-3 %. IgG subclass deficiencies affect only IgG subclasses (usually IgG2 or IgG3), with normal total IgG and IgM immunoglobulins and other components of the immune system being at normal levels.

  9. 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 ...