The results of this test should be considered in conjunction with other laboratory test results as well as the clinical presentation of the patient. Samples collected early in the course of the infection may not have detectable levels of toxoplasma IgM. A non-reactive IgM result may be due to delayed seroconversion and does not rule out current infection. In immunocompromised patients, the ability to produce an IgM response may be impaired, and specific IgM may be falsely negative during an active infection. False positive results may occur.

The results of this test should be taken within the context of the patient's clinical history, symptomatology, and other laboratory findings. This testing is not intended for use and screening blood or plasma donors. Performance characteristics have not been established for cord blood testing and neonates or for body fluids other than serum or plasma. Contaminated, icteric, lipemic, hemolyzed, or heat‑inactivated sera may cause erroneous results and should be avoided. Immune complexes or other immunoglobulin aggregates present in patient samples may cause increased non-specific findings and produce false positive results.