[Toxoplasmosis - the most common errors in diagnosis and treatment].

In common practice, toxoplasmosis may be a source of frequent diagnostic and therapeutic dilemmas. Three case reports are presented, illustrating the most frequent 'non-standard" situations resulting in erroneous interpretation of findings and therapeutic decisions. The first case was false or non-specific positivity of antibodies of several classes, leading to a heavy mental burden and wrong prenatal therapy in a pregnant patient. In the second case, persistent low IgG avidity was not interpreted in the context of other results, leading to a hasty decision to terminate the pregnancy. The third case report describes a wrong combination of therapy resulting in the development of numerous adverse effects in a young patient with repeated abortions.