IgM antibodies. IgM antibodies are the first antibodies to appear in the bloodstream after an infection.
They are produced by B cells, which are a type of white blood cell when the body is exposed to a foreign invader such as a virus or bacteria.
IgM antibodies are the largest of the antibody classes and are the first to be produced in response to an infection. They are also the first antibodies to be detected in blood tests and can be used to detect current cases of salmonella. IgM antibodies bind to the surface of the antigen, or the pathogen or foreign substance, to help the body's immune system recognize and attack the source of the infection.
They are short-lived, produced shortly after an infection, and are not present in the body for a long time, making them a good indicator of an active infection.
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