[Epidemiology of HIV in blood donors in West Germany].

Of a total of 5.6 million blood donations by 1.6 million German Red Cross donors between July, 1985 and December, 1987 tested for HIV antibodies 210 were found to be positive in at least one Western blot. Calculated per quarter, the prevalence (for first-time donors) of 10 per 100,000 in 1985 decreased to 4 per 100,000 in 1986, while the incidence (for multiple donors) was a constant 2 per 100,000 for each quarter in 1987. This indicates that new HIV infections were rare in blood donors and there was no exponential increase. Further analysis revealed that over 90% of those with confirmed Western blot positive results were members of risk groups or their direct contacts. The age and sex distribution conformed to the known pattern for AIDS cases in the Federal Republic of Germany. The data demonstrate that there is at present no indication of a rapid spread of HIV infections transmitted heterosexually among blood donors.