“…Outpatient substance abuse treatment units (OSATs) serve the majority (62%) of individuals entering substance abuse treatment in the United States (Grella, Etheridge, Joshi, & Anglin, 2000) and are well-positioned to educate drug users about infectious diseases (Hagan, Strauss, Astone, & Des Jarlais, 2005; Sorenson & Copeland, 2000). Governmental agencies such as the National Institutes of Health (NIH), the Centres for Disease Control and Prevention (CDC), and the Substance Abuse Mental Health Services Administration (SAMHSA) all acknowledge the important role that substance abuse treatment units play in infectious disease control, and actively promote the provision of both testing and community outreach services by OSATs and other treatment units as part of their ‘Seek, Test and Treat’ paradigm for addressing the HIV and HCV epidemics (Kerker & Dore, 2006; Kresina, Hoffman, Lubran, & Clark, 2007; SAMHSA, 2010). …”