A Study of Prevalence of the I50L Mutation When ATV Treated Patients Fail the Regimen

Inclusion Criteria

• •Atazanavir - containing antiretroviral regimen
• •Confirmed virologic failure defined as either:
• •1. HIV RNA by PCR greater than or equal to 1000 copies/mL after achieving a value of \<400 copies/mL on at least 2 consecutive measurements or
• •2. HIV RNA greater than or equal to 1000 copies/mL after 24 weeks of continuous therapy
• •At least 18 years old