nucleotide sequences of the genome of type retroviruses HIV-1, HIV-2, and SIV and its applications, in particular for amplification of genomes of retroviruses and for the in vitro diagnosis of infections due to these viruses.

Oligonucleotide characterized in that its sequence consists of: i) a specific sequence of the gag gene, and capable of hybridizing to a temperature of 60 n 1 ° C with genomes of the HIV-1 Bru, HIV-1 Mal, HIV-1 Eli viruses, HIV Rod and SIV Mac -2, or ii) a sequence complementary to a sequence as defined in i.