Expanded HIV Care in Opioid Substitution Treatment (EHOST) Trial

The EHOST intervention entails in-person presentations and consultation sessions with individual OST sites that will: (i) provide rationale for the study (ii) outline action items of the intervention; and (iii) describe guidelines around HIV testing and care. The EHOST intervention will be delivered at three distinct times: (i) at point of OST entry; (ii) following 7 days non-adherence; and (iii) at bi-annual intervals. The interventions are comprised of HIV test offers for individuals of unknown HIV status; offers of HIV-related care, including cluster of differentiation 4 (CD4), plasma viral load (pVL) and resistance tests, along with HAART initiation for those known to be HIV-positive, not on HAART; and regular monitoring for those known to be HIV positive, on HAART.