This trial aims at evaluating the efficacy and tolerance of 3 different second line treatment strategies: two recommended by WHO combine two non-nucleoside reverse transcriptase inhibitor associated with a ritonavir boosted protease inhibitor (emtricitabine-tenofovir-lopinavir/ritonavir and abacavir-didanosine-lopinavir/ritonavir); the third strategy combines emtricitabine-tenofovir-darunavir/ritonavir and is not yet evaluated in Sub-Saharian Africa. Darunavir has a potentially superior antiviral efficacy, a better tolerance and its single daily administration may facilitate treatment adherence.