[Re-interviews improve source-training in Gonorrhoea (author's transl)]. / Verbesserung der infektionsquellenforeschung bei Erkrankten an Gonorrhoe durch Wiederholungsbefragungen.

A sample should be given to improve the intensity of contact-tracing. Therefore three re-interviews were performed in two groups of patients suffering on gonorrhoea (Group A=1000;Group B=110 persons) with the aim to find out, how many persons could be traced more by re-interviews and could be found infected with gonorrhoea too. By re-interviews 12.0% more contacts could be traced, of whom 55.5% were infected.

Exchange of contact information between East Germany and other countries about persons infected with VD or at risk of infection.

26 per cent. of all contacts exchanged in both directions between East Germany and Poland in 1973, concerned people infected with STD. This high rate of efficiency obtained by the present methods of contact tracing justifies further cooperative epidemiological work in the field of STD, especially in view of the increasing industrial and economic cooperation and tourism between the two countries which is expected in the future.