What is toxoplasma Ab IgM?

Toxoplasma is commonly known as Toxoplasma gondii. It is obligate intercellular parasite that can infect the widest range of hosts known to science. Ab is an abbreviation for "antibody" of which IgM is one. The full name for IgM is Immunoglobulin M. http://en.wikipedia.org/wiki/Immunoglobulin_M