Non-injection drug use and hepatitis C among drug treatment clients in west central Mexico

The HCV prevalence found for the NIDU community treatment clients ranks among the lower HCV estimates published for NIDUs in treatment to date. The prevalence found for the in-prison clients ranks among the higher, raising a concern of possible elevated HCV infection among NIDUs in the west central Mexico prison-one compounded by the finding that none of this study's clients knew they were HCV positive.