[New actors in the fight against HIV/AIDS: overlapping and competition between existing structures].

The HIV/AIDS pandemia reshaped international relations and the world research landscape. New facilities have been created and new actors have emerged. New institutions has been grafted into the existing health infrastructure resulting in overlapping and sometimes conflicting actions. In this study we analyze this co-existence using the "Centre of Prevention and Voluntary testing of HIV/AIDS" (CPDV) in Cameroon as an example. The purpose is to show that the involvment of new actors in a health systems with multiple dysfunctions creates an environment leading to "straddling". This situation also raises legitimacy issues and leads to competition for position within the existing hierarchies.