[Demonstration of antibodies against HBs antigen with the modified MICROELISA-hepanostika-test (author's transl)].

Among various modifications of the Hepanostika test a simple, sensitive and reproducible one is described as being the best. Of 689 sera from patients in a haemodialysis unit 110 had antibodies against HBs antigen in the Hepanostika test and 150 in the Ausab test. Those antibodies which were not demonstrated in the Hepanostika test had a relatively low concentration (mean impulses per minutes 4.3 X NCx). Those sera which were positive in both the Hepanostika and Ausab test contained antibodies in higher concentrations (mean impulse/min 29.5 X NCx). Only 11 of the 689 sera were positive in the migration-electrophoresis test. A particularly advantage of the modified Hepanostika test is that both HBs antigen and antibodies against HBs antigen can be demonstrated simultaneously on the same plate. Using this method 200 sera were examined. The same sera were tested in the Austria-II-125 test for HBs antigen and the Ausab test for antibodies against HBs antigen. The Hepanostika test was positive in five, the Austria test in four sera. According to the Hepanostika test 43 sera contained antibodies against HBs antigen, while 45 did according to the Ausab test. The two that were positive only in the Ausab test were only weakly positive.