title: Changing seroepidemiology of hepatitis B, C, and D virus infections in high-risk populations.
abstract: Needle-sharing and sexual contact are important transmission routes of hepatitis B, C, and D virus (HBV, HCV, HDV) infection. This study aimed to investigate the current status of these viral infections among high-risk populations including prostitutes and intravenous (i.v.) drug users, compared with the prevalence rate reported previously to examine the changing seroepidemiology. Of the 916 female prostitutes, 79 (9%) were positive for antibody to HCV (anti-HCV), 111 (12%) were positive for HBV surface antigen (HBsAg), and 5 (5%) had antibody to HDV (anti-HDV). The prevalence rate was significantly lower compared to that in 1989-1991 (12%, P = 0.037) for HCV infection, and to that in 1988 (59%) and 1996 (40%) (P < 0.0001) for HDV infection. Of the 494 i.v. drug users, 87 (18%) patients were HBsAg carriers and 12 (14%) were anti-HDV-positive. The prevalence rate of HDV infection was significantly lower than that reported in 1985 (79%, P < 0.0001). Among the 443 tested i.v. drug users, 182 (41%) were anti-HCV-positive, significantly lower than that in 1985 (53%, P = 0.026). Of the 263 male prostitutes, 11 (4%) were anti-HCV-positive, 45 (17%) were HBsAg-positive, and 7 (16%) were anti-HDV-positive. Of the 129 illegal immigrant prostitutes, 7 (5%) were anti-HCV-positive, 15 (12%) were HBsAg-positive and none were positive for anti-HDV. In conclusion, the findings indicate a declining prevalence of HCV and HDV infections among drug users and prostitutes over the past 16 years. Male prostitutes and immigrant prostitutes are new "high-risk" populations and may become a reservoir for disease transmission.
authors.affiliation: Department of Medicine, Division of Gastroenterology, Taipei Veterans General Hospital and Institute of Clinical Medicine, National Yang-Ming University School of Medicine, Taiwan.
authors.forename: Teh-Ia
authors.initials: TI
authors.lastname: Huo
authors.forename: Jaw-Ching
authors.initials: JC
authors.lastname: Wu
authors.forename: Shiow-Ing
authors.initials: SI
authors.lastname: Wu
authors.forename: An-Lung
authors.initials: AL
authors.lastname: Chang
authors.forename: Shih-Ku
authors.initials: SK
authors.lastname: Lin
authors.forename: Chun-Hung
authors.initials: CH
authors.lastname: Pan
authors.forename: Yi-Hsiang
authors.initials: YH
authors.lastname: Huang
authors.forename: Full-Young
authors.initials: FY
authors.lastname: Chang
authors.forename: Shou-Dong
authors.initials: SD
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D016174:Hepacivirus / Q000276:immunology*; D006508:Hepatitis Antibodies / Q000097:blood*; D006514:Hepatitis B Surface Antigens / Q000097:blood*; D006515:Hepatitis B virus / Q000302:isolation & purification*; D003698:Hepatitis Delta Virus / Q000276:immunology*; D006525:Hepatitis, Viral, Human / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012307:Risk Factors; D016036:Seroepidemiologic Studies; D011477:Sex Work; D015819:Substance Abuse, Intravenous / Q000150:complications
chemical_list: D006508:Hepatitis Antibodies; D006514:Hepatitis B Surface Antigens