[Basis for the interpretation of toxoplasmosis immunofluorescence serology].

Exact knowledge of the sensitivity and reproducibility of immunofluorescence serology is essential in interpreting antibody titers. Comparison of titers from laboratory to laboratory is difficult, and the expression of titers in international units is worth attempting. 66% of Bernese people over 20 years of age have fluorescent-reacting antibodies against Toxoplasma gondii.