| hepatitis d virus and human immunodeficiency virus antibodies in parenteral drug abusers who are hepatitis b surface antigen positive. | we studied unselected, hepatitis b surface antigen (hbsag)-positive parenteral drug abusers for antibody to hepatitis d virus (anti-hd) and antibody to human immunodeficiency virus (hiv). the prevalences of anti-hd and antibody to hiv were 67% and 58%, respectively, and there was no association between positivity for these two markers. in a logistic regression model, anti-hd was associated with older age (p = .001), longer duration of drug abuse (p = .045), and the presence of liver disease (p = ... | 1988 | 3171227 |