Negative IgM:
- Interpretation: No recent or active Toxoplasma gondii infection.
- Implications:
  - The individual has not been recently infected.
  - If symptoms are present, another cause should be considered.
Positive IgM:
- Interpretation: Indicates a recent infection with Toxoplasma gondii, as IgM antibodies are typically produced within the first week of infection and can remain detectable for several months.
- Implications:
  - The individual has a recent or possibly ongoing infection.
  - Further testing, such as Toxoplasma IgG and IgG avidity tests, may be needed to confirm the timing and severity of the infection.
  - In pregnant women, a positive IgM test is particularly significant due to the risk of congenital toxoplasmosis. Additional tests and close monitoring are required.

Toxoplasma IgG: Often measured alongside IgM. IgG antibodies appear later than IgM and can indicate past exposure or infection.
- Negative IgG and Negative IgM: No evidence of infection.
- Positive IgG and Negative IgM: Past infection, immunity developed.
- Positive IgG and Positive IgM: Recent or active infection.
IgG Avidity Test: Sometimes used to distinguish between recent and past infections, especially in pregnant women. High avidity indicates past infection, while low avidity suggests recent infection.