Abstract
The human immunodeficiency virus (HIV) epidemic in Spain was characterized throughout the first few years by the predominance of infections among injected drug users (IDU's), but everything currently points to a progressive predominance of sexual transmission. This study is aimed at describing the trend in HIV infection among several heterosexual populations groups and at characterizing the situations in which the infections occurred. Descriptive study of the individualls who had the test conducted for the first time at nine HIV diagnosis centres within the 1992-2003 period due to high-risk heterosexual exposures, not including injected drug users. A total of 47,870 individuals had serology performed during the period under study. The HIV prevalence among the population under study dropped from 3.2% to 1.0% (p< 0.001). Among the individuals with an HIV infected partners, the prevalence remained at around 10%, the male users of prostitution having dropped from 1.9% to 1.0% (p=0.049); among women involved in prostitution, from 1.4% to 0.7% (p=0.008); and among all other heterosexuals, having dropped from 1.6% to 1.0% among males (p=0.014) and from 1.1% to 0.7% among women (p=0.012). The results indicate advances in the control of heterosexual human immunodeficiency virus transmission, mainly among women, although it is necessary to still continue stressing prevention.
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