Toxoplasmosis testing is to detect a Toxoplasma gondii infection in a pregnant woman, unborn baby, or in a person with a weakened immune system. Toxoplasmosis is an infection caused by the parasite Toxoplasma gondii (T. gondii).
What does the test result mean?
- Negative IgM and positive IgG: past infection.
- Negative IgM and negative IgG: infection or very early infection or no previous exposure.
- Positive IgM and negative IgG: early infection; in a newborn, indicates congenital infection.
- Positive IgM and positive IgG: current infection; chronic infection; could indicate re-activation; IgM may be positive for several months after the infection resolves.
If the molecular test is positive for T. gondii DNA, then the person tested has an active toxoplasmosis infection.
A negative test result means that it is less likely that the person has toxoplasmosis but does not rule out infection.
Keywords: toxoplasmosis testing