[Possibilities of extension of blood group determination in cases of disputed paternity]

Results of the blood-group testing carried out in 1966-1974 in cases of discussed paternity are described in detail. Until 1970 only blood groups A1, A2, BO, MN and systems of Hp Rh and Gm (a) were tested (so called fundamental-testing). Maximal chance of exclusion of paternity on the base of these systems 70%. From 1970 on, the investigation have been extended to systems Gm (b), Gm(x), INV (1), Ss, Kell-Cellano, Duffy and during the last two years to systems of Gc, acid-phosphatase of erythrocytes and glutamat-pyruvat-transaminase. Thus the maximal chance of exclusion of paternity increased to 90%. Chances of exclusion on the base of every system are discussed separately also in detail. Fundamental-test were carried out in 10 200 cases, extended-tests in 278 cases. On the base of fundamental-tests exclusion of paternity could be achieved in 32, 85% of the cases. In 1974 in 374 (32, 21%) cases out of 1161 by fundamentaltesting, in further 100 (8,61%) cases by extended testing altogether in 474 (40,82%) cases- could be achieved exclusion of the paternity. These data indicate effectivity and reasonableness of the extension of blood-grouping-testing.