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  • Title: [Acute toxoplasmosis: evaluation of a thin-layer immunoassay technic for detection of IgM antibodies, anti-Toxoplasma gondii].
    Author: Requejo HI, Matsumoto TK, Kawarabayashi M, Nakamura PM, Ebner Filho W, Nunes Jde J.
    Journal: Rev Inst Med Trop Sao Paulo; 1990; 32(1):51-7. PubMed ID: 2259832.
    Abstract:
    A solid phase method, thin-layer immunoassay (IgM-TIA) was standardized and evaluated for the immunodiagnosis of acute toxoplasmosis, through the detection of IgM antibodies to Toxoplasma gondii. A total of 300 serum samples from serologically defined acute toxoplasmosis and, from non-related infections, was investigated by IgM-TIA. Statistical analysis were carried out in comparison with conventional tests, the immunofluorescence test for the detection of IgM antibodies (IgM-IFI) and hemagglutination test which uses 2-mercaptoethanol serum treatment (2ME-HA). Also the correlation coefficients were calculated for various Toxoplasma gondii antigen concentrations, as well as, the influence of the antigenic concentration on the relative indices of sensitivity and specificity were verified. The intra and inter test reproducibilities were demonstrated statistically, as well as, the reutilization of T. gondii antigen was proven to be possible for at least 10 times. The data indicated that antigenic concentrations, from 70 to 100 Cmg/ml, were able to provide maximum sensitivity and specificity. IgM-TIA displayed similar diagnostic efficiency to those two conventional tests here utilized, and may be employed to make diagnosis of acute toxoplasmosis, mainly if laboratory animals are available.
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