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  2. Reference ranges for blood tests - Wikipedia

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

    Reference ranges often depend on the analytical method used, for reasons such as inaccuracy, lack of standardisation, lack of certified reference material and differing antibody reactivity. [11] Also, reference ranges may be inaccurate when the reference groups used to establish the ranges are small.

  3. Immunoglobulin M - Wikipedia

    en.wikipedia.org/wiki/Immunoglobulin_M

    IgM is the first immunoglobulin expressed in the human fetus (around 20 weeks) [46] and phylogenetically the earliest antibody to develop. [47] IgM antibodies appear early in the course of an infection and usually reappear, to a lesser extent, after further exposure. IgM antibodies do not pass across the human placenta (only isotype IgG). [48]

  4. Seroconversion - Wikipedia

    en.wikipedia.org/wiki/Seroconversion

    The standard serology panel for seroconversion include hepatitis B surface antigen, hepatitis B surface antibody for IgM and IgG, hepatitis B core antibody for IgM and IgG, and hepatitis B e-antigen. [61] In the typical disease course for hepatitis B, [62] the individual will first seroconvert for hepatitis B surface antigen (HBsAg).

  5. Monoclonal B-cell lymphocytosis - Wikipedia

    en.wikipedia.org/wiki/Monoclonal_B-cell_lymphocy...

    Individuals with CBL-MZ commonly present with: B-cell blood counts that are extremely high (>4.0x10 9; range 3.0x10 9 /L to 37.1x10 9 /L);, [6] represent a large percentage of cases that would otherwise be designated as non-CLL/SLL MLB; [2] often have an IgM monoclonal gammopathy, i.e. high blood levels of a monoclonal IgM antibody; and in ...

  6. ABO blood group system - Wikipedia

    en.wikipedia.org/wiki/ABO_blood_group_system

    ABO blood group antigens present on red blood cells and IgM antibodies present in the serum. The ABO blood group system is used to denote the presence of one, both, or neither of the A and B antigens on erythrocytes (red blood cells). [1]

  7. Coombs test - Wikipedia

    en.wikipedia.org/wiki/Coombs_test

    Both IgM and IgG antibodies bind strongly with their complementary antigens. IgG antibodies are most reactive at 37°C. IgM antibodies are easily detected in saline at room temperature as IgM antibodies are able to bridge between RBC's owing to their large size, efficiently creating what is seen as agglutination.

  8. Blood compatibility testing - Wikipedia

    en.wikipedia.org/wiki/Blood_compatibility_testing

    Blood compatibility testing is routinely performed before a blood transfusion.The full compatibility testing process involves ABO and RhD (Rh factor) typing; screening for antibodies against other blood group systems; and crossmatching, which involves testing the recipient's blood plasma against the donor's red blood cells as a final check for incompatibility.

  9. Isotype (immunology) - Wikipedia

    en.wikipedia.org/wiki/Isotype_(immunology)

    Thus an antibody isotype is determined by the constant regions of the heavy chains only. [1] IgM is first expressed as a monomer on the surface of immature B cells. Upon antigenic stimulation, IgM+ B cells secrete pentameric IgM antibody formed by five Ig monomers which are linked via disulfide bonds.