Immunoglobulins or antibodies, play an important role in the immune system and help fight against harmful bacteria and viruses in the body. There are five classes of antibodies and several subclasses. IgM antibodies are involved in the very early stages of an immune response and first to be made by the body when fighting a new infection, providing short-term protection.
What might a low result mean?
Low IgM levels can be seen in some inherited types of immune diseases and in some types of leukemia.
What might a high result mean?
As IgM antibodies are the first antibody produced when fighting a new infection, high levels of IgM may indicate a new infection is present.