Click here for more information about laboratory operations and procedures
Toxoplasma gondii Antibody, IgM
|In House Availability||Tuesday (day shift)|
|Container type||Gold top|
|Amount to Collect||1 mL blood|
|Preferred volume||0.5 mL serum|
|Processing notes||Freeze at -20C|
|Turn around times||1-8 days|
|Additional information||The FDA recommends that IgM assays only be performed in conjunction with an IgG Antibody test. Equivocal results may be clarified by repeating the test after an additional week or more has passed. Because IgM antibody may persist for more than a year after acute infection, IgM assay is most reliable in excluding recent primary infection, except in the earliest stages or in rare neonates who do not have an early IgM response, in whom additional testing may be needed.
IgM is not usually elevated in disease due to reactivation of latent infection, such as chronic chorioretinitis or encephalitis in immunosuppressed patients with AIDS or lymphoma. The diagnosis of acute or recent Toxoplasma gondii infection should not be based on one IgM serology result. It is suggested that a positive result be confirmed by an alternate method.
Human anti-mouse antibodies (HAMA) or heterophile antibodies may be present in samples from individuals exposed to mouse or animal immunoglobulins from natural sources or as part of disease therapies. These antibodies may interfere with the Centaur Toxoplasma M assay and may give falsely positive or falsely negative results. These samples should not be tested.
|Last Updated||10/2/2010 11:52:42 AM|
If you have additional questions regarding this test, please call: 415-353-1667