[Diagnosis of acquired toxoplasmosis using simultaneous determination of specific immunoglobulins M, A and E]

Simultaneous estimation of specific immunoglobulins M,A,E was tested in sera of 57 patients with confirmed acquired toxoplasmosis (24 acute and 33 subacute or chronic) using immunosorbent agglutination assay (ISAGA) and immunofluorescent tests (toxoplasma antibody-total and IgM). The antigen for ISAGA was prepared from tissue cultures HeLa infected with Toxoplasma gondii virulent strain P. Toxoplasmas were maintained in tissue cultures continuously for 18 years. High levels of IgM antibodies were found in all 24 patients during the acute phase of toxoplasmosis (0-5 month after onset). IgA antibodies were found also in all but one and IgE in 71% of these patients. IgM antibodies persisted for the longest period and it was possible to find them in 14% of patients 3 years or longer after the onset, IgA antibodies persisted for 9 months similarly as IgE (with one exception after 2 years). Simultaneous estimation of specific immunoglobulins M,A,E combined with immunofluorescent tests makes the diagnosis of Toxoplasma infection more reliable.