These cells in turn produce an excess of immunoglobulin M, a class of sticky immune proteins whose presence makes the blood viscous.

All have low levels of immunoglobulin M (IgM) but features of an immunodeficiency are absent.

The main attributing antibody is immunoglobulin M (IgM).

Anti-toxoplasma immunoglobulin M (IgM) antibodies are usually absent.

However, several promising approaches have been proposed, such as the measurement of a lipid-specific immunoglobulin M as predictor of long-term outcomes.

Immunoglobulin M tests exist for other respiratory viral infections and can detect them within a few days, Dr. Bellini said.

Immunoglobulin M (IgM)

Immunoglobulin M, or IgM for short, is a basic antibody that is produced by B cells.

These malignant cells usually express surface immunoglobulin, most bearing surface immunoglobulin M with either kappa or lambda light chains.

However, a determination of relative amounts of antibody present as immunoglobulin M and G can indicate the recency of infection.

Most hypergammaglobulinemias are caused by an excess of immunoglobulin M (IgM), because this is the default immunoglobulin type prior to class switching.

It binds to immunoglobulin G as well as immunoglobulin M on antibody marked non-enveloped virions which have infected the cell.

The associated anti-A and anti-B antibodies are usually immunoglobulin M, abbreviated IgM, antibodies.

Lymphoplasmacytic lymphoma is usually associated with a monoclonal serum paraprotein of immunoglobulin M (IgM) type (Waldenström macroglobulinemia).

It is a Plasma cell dyscrasia, resembling leukemia, with cells of lymphocytic, plasmacytic, or intermediate morphology, which secrete a monoclonal immunoglobulin M component.

The initial blood test screens for immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies to the virus.

More recently, more sensitive tests have been developed, such as the immunoglobulin G (IgG) and immunoglobulin M (IgM) tests.

Thus, in preparations from chicken eggs, there is no contamination with Immunoglobulin A (IgA) or Immunoglobulin M (IgM).

These mice have reduced numbers of conventional B lymphocytes, down-regulated surface immunoglobulin M and costimulatory molecules, and elevated numbers of B1a B cells.

Hyper IgM syndrome is a family of genetic disorders in which the level of Immunoglobulin M (IgM) antibodies is relatively high.

Definitive diagnosis of WNV is obtained through detection of virus-specific antibody Immunoglobulin M, (IgM) and neutralizing antibodies.

Five different hypergammaglobulinemias are caused by an excess of immunoglobulin M (IgM), and some types are caused by a deficiency in the other major types of immunoglobulins.

Furthermore, infection with C. pneumonia also induces serum immunoglobulin M (IgM), IgA, and IgG responses, which are associated with chronic asthma.

Typically, immunoglobulin M (IgM) levels are low, IgA levels are elevated, and IgE levels may be elevated; paraproteins are occasionally observed.

Sharks, and possibly other cartilaginous fishes, have immunoglobulin M (IgM) and immunoglobulin W (IgW) as well, both types with two heavy and two light chains.