[Immunodiagnostic results of amoebiasis. The value of counter immunoelectrophoresis in comparison to three other immunotests (author's transl)].

63 cases of extraintestinal amoebiasis, 17 cases of intestinal amoebiasis, and 25 selected control persons were examined for serum antibodies to antigen from E. histolytica using the counter-immunoelectrophoresis, the complement fixation test, the indirect haemagglutination test and the latex agglutination test. In addition counter-immunoelectrophoresis was applied to 41 sera from patients with extraintestinal amoebiasis whose other serological results were included in a previous study. Even with the employment of our immunological methods, the test results can be used for diagnostic purposes only when they are in accordance with the clinical picture and the exposure. Complete failures of the immuno-diagnostic tests did not occur in our study. On the other hand, there are persons with no symptoms of amoebiasis who have antibodies in two tests, among them sometimes the counter-immunoelectrophoresis, with levels corresponding to those of intestinal or extra-intestinal amoebiasis.