Toxoplasma gondii (T. gondii) is a parasitic protozoan that can infect humans and animals. It causes a condition called toxoplasmosis, which is usually mild or asymptomatic in healthy individuals but can be more severe in people with weakened immune systems or pregnant women.
When a person is exposed to T. gondii for the first time, their immune system produces specific antibodies called immunoglobulin M (IgM) in response to the infection. IgM antibodies are the first line of defense and are typically produced early in the course of an infection.
The Toxoplasma gondii IgM test is a blood test that detects the presence of IgM antibodies against the parasite. It is used to determine if a recent or active infection with T. gondii has occurred. The test is often ordered if there is suspicion of acute toxoplasmosis, especially in pregnant women or individuals with a weakened immune system.
