Premium
Differences in hepatitis C virus prevalence and clearance by mode of acquisition among men who have sex with men
Author(s) -
Seaberg E. C.,
Witt M. D.,
Jacobson L. P.,
Detels R.,
Rinaldo C. R.,
Young S.,
Phair J. P.,
Thio C. L.
Publication year - 2014
Publication title -
journal of viral hepatitis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.329
H-Index - 100
eISSN - 1365-2893
pISSN - 1352-0504
DOI - 10.1111/jvh.12198
Subject(s) - hepatitis a virus , virology , men who have sex with men , medicine , biology , virus , human immunodeficiency virus (hiv) , syphilis
Summary We examined the characteristics associated with hepatitis C virus ( HCV ) antibody (anti‐ HCV ) prevalence and HCV clearance between injection drug using ( IDU ) and non‐ IDU men who have sex with men ( MSM ). Stored serum and plasma samples were tested for anti‐ HCV and HCV RNA to determine the HCV status of 6925 MSM at enrolment into the M ulticentre AIDS C ohort S tudy ( MACS ). Prevalence and clearance ratios were calculated to determine the characteristics associated with HCV prevalence and clearance. Multivariable analyses were performed using Poisson regression methods with robust variance estimation. Anti‐ HCV prevalence was significantly higher among IDU than among non‐ IDU MSM (42.9% vs 4.0%), while clearance was significantly lower among IDU MSM (11.5% vs 34.5% among non‐ IDU MSM ). HIV infection, B lack race, and older age were independently associated with higher prevalence in both groups, while smoking, transfusion history, and syphilis were significantly associated with prevalence only among non‐ IDU MSM . The rs12979860‐ C / C genotype was the only characteristic independently associated with HCV clearance in both groups, but the effects of both rs12979860‐ C / C genotype [clearance ratio (CR) = 4.16 IDU s vs 1.71 non‐ IDU s; P = 0.03] and HB s A g positivity (CR = 5.06 IDU s vs 1.62 non‐ IDU s; P = 0.03) were significantly larger among IDU MSM . HIV infection was independently associated with lower HCV clearance only among non‐ IDU MSM ( CR = 0.59, 95% CI = 0.40–0.87). IDU MSM have higher anti‐ HCV prevalence and lower HCV clearance than non‐ IDU MSM . Differences in the factors associated with HCV clearance suggest that the mechanisms driving the response to HCV may differ according to the mode of acquisition.