This thesis examines the social representations that a multidisciplinary team of professionals which works in an ambulatory specialized in HIV / AIDS in the Azevedo Lima State Hospital have on the issue of the serodiscordance. The study presents the new recommendations from the Ministry of Health for the matters that involve serodiscordance named Positive Strategies and analyzes its answers in the daily services. The interviews with professionals in the clinic were semistructured, combining three elements: social-demographic data, in order to learn issues that affect the interviewed people social status, institution data, to understand how relationships influence the institutional vision of the serodiscordance, and data on serodiscordance whose objective is to understand the professional representations on the subject. The study highlights and analyzes the main difficulties found by the team for taking up this new routine of work and presents interfering factors aspects of institutional culture and permanent education. This thesis contributes to the possibility of change and adaptation of routines that look at the phenomenon of serodiscordance better.