[Re-interviews improve source-training in Gonorrhoea (author's transl)].

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.