Dual nucleoside analogue treatment in the era of highly active antiretroviral therapy (HAART): a single-centre cross-sectional survey.

Since limited literature exists regarding the outcomes of dual nucleoside analogue reverse transcriptase inhibitor (NRTI) treatment in the highly active antiretroviral therapy (HAART) era, a cross-sectional survey was carried out in a population of around 1000 HIV-infected patients in a single northern Italian university hospital, to assess the frequency, background and long-term evolution of anti-HIV treatment conducted with two NRTIs. An appreciable proportion (20.4%) of the 798 HIV-infected patients currently treated with antiretrovirals at our centre still take a dual NRTI combination, and the great majority of them (68.7%) have a stable disease course (characterized by a viral load <3.7 log(10) HIV RNA copies/mL, a maintained CD4(+) lymphocyte count and absence of HIV disease progression after at least 24 months of follow-up), regardless of the selected regimen, prior antiretroviral therapy use, and baseline virological and immunological situation. Further studies are warranted to establish whether dual NRTI regimens may have residual indications in the HAART era, and whether the shift to a triple antiretroviral combination is expected to lead to long-term advantages in patients with a low risk of disease progression while on dual NRTI treatment.