Search

The question of whether to initiate ART at higher CD4+ cell counts than currently recommended by World Health Organization (WHO) treatment guidelines received much attention at the XVII International AIDS Conference (AIDS 2008). If studies presented at the conference ultimately lead to a revision of WHO treatment guidance, the estimated number of people who will need ART globally will increase substantially. Task-shifting is emerging as an important strategy for dealing with the acute shortage of health care workers in many high-burden countries, and several studies presented at AIDS 2008 demonstrated the impressive health system efficiencies garnered by using nurses or other health care providers to deliver HIV care and treatment. Other key presentations and discussion at the conference focused on the optimal time to start TB treatment in HIV-infected patients, the growing risk of resistance in high-burden countries, including its impact on future treatment options, and several large cohort trials testing optimal drug regimens in resource-limited settings.Biomedical prevention research continues to confirm the long-term, protective benefits of circumcision. Several studies involving HIV serodiscordant heterosexual couples have produced data suggesting a strong protective effect of ART for HIV-negative partners. Disappointing results from recent vaccine and non-ARV based microbicides trials are nevertheless providing important data to this field, and the expanding number of pre-exposure prophylaxis (PrEP) trials and ARV-based microbicides appear to provide the best hope for a new, efficacious biomedical prevention intervention.

Background: Antiretroviral therapy (ART) has reached millions of HIV-infected patients worldwide, however very little is known about their perceptions about HIV disease and its treatment. The AIDS Treatment for Life International Survey (ATLIS) is the largest sampling of patient perceptions about HIV disease and its treatment, as well as their behaviors, including HIV status disclosure and ART adherence., Methods: The International Association of Physicians in AIDS Care (IAPAC) and its survey vendor, Ipsos Insight Health, conducted a convenience-sample survey of 2555 treated and untreated HIV-infected adults recruited by diverse means from 6 regions: North America, Latin America, the Caribbean, Europe, Asia/Pacific, and sub-Saharan Africa., Findings: Nearly three quarters of respondents were taking prescription medications for HIV infection or related diseases. Participants reported generally good overall health and high degrees of satisfaction with current antiretroviral drugs, though approximately half of respondents voiced concern about potential ART toxicity and 39.4% reported switching their antiretroviral regimen specifically because of treatment-associated side effects. About 1 in 5 respondents never took medications for HIV and AIDS. Among the three quarters of respondents currently taking medications, 37% are taking their first prescribed antiretroviral regimen, and 24% have switched from a first-line antiretroviral regimen. Three quarters of respondents believe ART will help them live a long life, and treatment-experienced respondents expressed this view significantly more often than untreated respondents. Large majorities of respondents in Latin America, Asia, and South Africa want to know more about ART, while half or fewer in these countries correctly explained the meaning of undetectable HIV RNA (defined as <50 HIV RNA copies/mL of plasma) or knew their CD4 cell count.

The 2008 International HIV Drug Resistance Workshop explored six topics on viral resistance: new antiretrovirals; clinical implications; epidemiology; new technologies and interpretations; HIV pathogenesis, fitness, and resistance; and mechanisms of resistance. The last of these topics provided a forum for new work on resistance of hepatitis B and C viruses, which were also explored in two poster sessions. Much work focused on resistance to the two most recent antiretroviral classes (integrase inhibitors and CCR5 antagonists), a new set of entry inhibitor candidates and one new class represented by the maturation inhibitor bevirimat. Other research explored two novel non-nucleoside reverse transcriptase inhibitors, etravirine and IDX899. Epidemiological work analysed rates of transmitted resistant virus, multiclass resistance in antiretroviral-experienced patients and a heightened resistance risk in injecting drug users regardless of adherence. New research on resistance technologies involved an enhanced assay for HIV-1 coreceptor determination and improved gene-based tools for predicting coreceptor use. In the pathogenesis arena, a small study of intensification shed light on the likely source of residual viraemia in patients on successful antiretroviral therapy. A large study in Mozambique correlated the timing of infant infection with selection, transmission and persistence of nevirapine resistance mutations. Mechanistic research explored resistance to the integrase inhibitor raltegravir, K65R-mediated resistance to tenofovir and the role of connection domain mutations in resistance to zidovudine.