**2. Kinetics of immunologic response**

At the beginning of toxoplasmosis disease, during the first-week post-infection, IgM starts to appear. At this time, the role of Sabin Feldman test is fundamental because it detects IgG and IgM together. The next immunoglobulin (Ig) to appear is IgE, then IgA. IgG appears within the first month, stabilizes two or three months after infection has started, and persists throughout life (as shown in **Figure 3**) [1–5, 7, 8, 11].


*The Important Role of Laboratories in the Diagnosis and Prevention of Toxoplasma Infection DOI: http://dx.doi.org/10.5772/intechopen.108313*

**Figure 3.** *Kinetics immunologic response. Note: Own elaboration.*

