Abstract
Infection with the hepatitis C virus (HCV) is a major public health burden in Canada and globally. The literature shows that injection drug use is currently the primary transmission route for HCV, and that a majority of injection drug users (IDUs) are currently infected with HCV in Canada. This article first reviews the burden of HCV within IDU populations and the transmission risks and the treatment implications speicifc to IDUs. Traditionally, IDUs have been excluded from HCV treatment unless abstaining from illicit drug use. However, recent research suggests that categorical exclusion is not medically necessary. A series of key questions about the feasibility of offering HCV treatment to IDUs in the specific Canadian context are considered, including concerns related to the motivation of treatment for IDUs, treatment delivery, treatment side effects, HCV reinfection, and the social environment. The article concludes that treatment of HCV-infected illicit drug users is both feasible and may be necessary to reduce transmission and adverse outcomes in this high-risk population.
Keywords: Canada, Hepatitis C, Injection drug use, Prevention, Treatment
Full Text
The Full Text of this article is available as a PDF (160.6 KB).
References
- 1.Remis RS, Hogg RS, Krahn MD, Preiksaitis JK, Sherman M. Estimating the Number of Blood Transfusion Recipients Infected by Hepatitis C in Canada, 1960–1985 and 1990–1992. Ottawa, Ontario, Canada: Laboratory Centre for Disease Control; 1998. [Google Scholar]
- 2.Alter MJ, Kruszon-Moran D, Nainan OV, et al. The prevalence of hepatitis C virus infection in the United States, 1988 through 1994. New Engl J Med. 1999;341:556–562. doi: 10.1056/NEJM199908193410802. [DOI] [PubMed] [Google Scholar]
- 3.Alter MJ. The epidemiology of acute and chronic hepatitis C. Clin Liver Dis. 1997;1:559–568. doi: 10.1016/S1089-3261(05)70321-4. [DOI] [PubMed] [Google Scholar]
- 4.Zou S, Tepper M, Giulivi A. Current status of hepatitis C in Canada. Can J Public Health. 2000;91:S10–S15. doi: 10.1007/BF03405100. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 5.Patrick D, Buxton J, Bigham M, Mathias R. Public health and hepatitis C. Can J Public Health. 2000;91:S18–S21. [PubMed] [Google Scholar]
- 6.World Health Organization The world health report 1998—life in the 21st century: a vision for all. Wkly Epidemiol Record. 1998;73:145–152. [Google Scholar]
- 7.Alter MJ, Margolis HS, Krawczynski K, et al. The natural history of community-acquired hepatitis C in the Untied States. N Engl J Med. 1992;327:1899–1905. doi: 10.1056/NEJM199212313272702. [DOI] [PubMed] [Google Scholar]
- 8.Seeff LB. Natural history of hepatitis C. Hepatology. 1997;26:21S–28S. doi: 10.1002/hep.510260704. [DOI] [PubMed] [Google Scholar]
- 9.Zou S, Forrester L, Giulivi A. Hepatitis C update. Can J Public Health. 2003;94:127–129. doi: 10.1007/BF03404585. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 10.Zou S, Teppe M, Elsaadany S. Prediction of hepatitis C burden in Canada. Can J Gastroenterol. 2000;14:575–580. doi: 10.1155/2000/642707. [DOI] [PubMed] [Google Scholar]
- 11.Wong JB, McQuillan GM, McHutchison JG, Poynard T. Estimating future hepatitis C morbidity, mortality and costs in the Untied States. Am J Public Health. 200;90:1562–1569. doi: 10.2105/ajph.90.10.1562. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 12.Cherubin CE, Sapira JD. The medica complications of drug addiction and the medical assessment of the intravenous drug user: 25 years later. Ann Intern Med. 1993;119:1017–1028. doi: 10.7326/0003-4819-119-10-199311150-00009. [DOI] [PubMed] [Google Scholar]
- 13.Flamm SL, Parker RA, Chopra S. Risk factors associated with chronic hepatitis C virus infection: limited frequency of an unidentified source of transmission. Am J Gastroenterol. 1998;93:597–600. doi: 10.1111/j.1572-0241.1998.171_b.x. [DOI] [PubMed] [Google Scholar]
- 14.Conry-Cantilena C, VanRaden M, Gibble J, et al. Routes of infection, viremia, and liver disease in blood donors found to have hepatitis C virus infection. N Engl J Med. 1996;334:1691–1696. doi: 10.1056/NEJM199606273342602. [DOI] [PubMed] [Google Scholar]
- 15.Tortu S, Neaigus A, McMahon J, Hagen D. Hepatitis C among noninjecting drug users: a report. Subst Use Misuse. 2001;36:523–534. doi: 10.1081/JA-100102640. [DOI] [PubMed] [Google Scholar]
- 16.Harsch HH, Pankiewicz J, Bloom AS, et al. Hepatitis C virus infection in cocaine users—a silent epidemic. Community Mental Health J. 2000;36:225–233. doi: 10.1023/A:1001988613235. [DOI] [PubMed] [Google Scholar]
- 17.Strader DB. Understudied populations with hepatitis C. Hepatology. 2002;36:S226–S236. doi: 10.1002/hep.1840360729. [DOI] [PubMed] [Google Scholar]
- 18.Hagan H. Hepatitis C virus transmission dynamics in injection drug users. Subst Use Misuse. 1998;35:1197–1212. doi: 10.3109/10826089809062214. [DOI] [PubMed] [Google Scholar]
- 19.Kelen GD, Green GB, Purcell RH, et al. Hepatitis B and hepatitis C in emergency department patients. N Engl J Med. 1992;326:1399–1404. doi: 10.1056/NEJM199205213262105. [DOI] [PubMed] [Google Scholar]
- 20.Crofts N, Hopper JL, Bowden DS, Breschkin AM, Milner R, Locarnini SA. Hepatitis C virus infection among a cohorrt of Victorian injecting drug users. Med J Aust. 1993;59:237–241. doi: 10.5694/j.1326-5377.1993.tb137822.x. [DOI] [PubMed] [Google Scholar]
- 21.Coppola RC, Masia G, Martino ML, et al. Sexual behaviour and multiple infections in drug abusers. Eur J Epidemiol. 1996;12:429–435. doi: 10.1007/BF00143992. [DOI] [PubMed] [Google Scholar]
- 22.Diamantis I, Bassetti S, Erb P, Ladewig D, Gyr K, Battegay M. High prevalence and coinfection rate of hepatitis G and C infections in intravenous drug addicts. J Hepatol. 1997;26:794–797. doi: 10.1016/S0168-8278(97)80244-9. [DOI] [PubMed] [Google Scholar]
- 23.Garfein R, Doherty MC, Monterroso ER, Thomas DL, Nelson K, Vlahov D. Prevalence and incidence of hepatitis C virus infection among young adult injection drug users. J Acquire Immun Defic Syndr. 1998;18:S11–S19. doi: 10.1097/00042560-199802001-00004. [DOI] [PubMed] [Google Scholar]
- 24.Palitzsch KD, Hottentrager B, Schlottman K, et al. Prevalence of antibodies against hepatitis C virus in the adult German population. Eur J Gastroenterol Hepatol. 1999;11:1215–1220. doi: 10.1097/00042737-199911000-00005. [DOI] [PubMed] [Google Scholar]
- 25.Fugslang T, Fouchard JR, Ege PP. Prevalence of HIV and hepatitis B and C among drug addicts in the city of Copenhagen. Ugeskr Laeger. 2000;162:3860–3864. [PubMed] [Google Scholar]
- 26.Denis B, Dedobbeleer M, Collet T, et al. High prevalence of hepattis virus infection in Belgian intravenous drug users and potential role of the “cotton-filter” in transmission: the GEMT study. Acta Gastroenterol Belg. 2000;63:147–153. [PubMed] [Google Scholar]
- 27.Hagan H, Thiede H, Weiss NS, Hopkins SG, Duchin J, Alexander ER. Sharing of drug preparation equipment as a risk factor for hepatitis C. Am J Public Health. 2001;91:42–46. doi: 10.2105/ajph.91.1.42. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 28.diaz T, Jarlais D, Vlahov D, et al. Factors associated with prevalent hepatitis C: differences among young adult injection drug users in lower and upper Manhattan, New York City. Am J Public Health. 2001;91:23–30. doi: 10.2105/AJPH.91.6.927. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 29.Fischer B, Rehm, J, Baliunas D, et al. OPICAN Toronto site: Baseline data overview. Paper presented at: IHRT All-Projects Conference; Sept. 28–29, 2002; Toronto, Ontario, Canada.
- 30.Patrick D, Tyndall M, Cornelisse P, et al. Incidence of hepatitis C virus infection among injection drug users during an outbreak of HIV infection. CMAJ. 2001;165:889–895. [PMC free article] [PubMed] [Google Scholar]
- 31.Lamothe F, Vincelette J, Bruneau J, et al. Prevalence, seroconversion rates and risk factors for hepatitis B core, hepatitis C and HIV antibodies among intravenous drug users (IDU) of the Saint-Luc Cohort (abstract 221). 6th Annual Canadian Conference on HIV/AIDS Research, May 1997. Can J Infect Dis. 1997;28A.
- 32.Fischer B, Medved W, Gliksman L, Rehm J. Illicit opiates in Toronto: a profile of current users. Addict Res Theory. 1999;7:377–415. [Google Scholar]
- 33.Miller CL, Spittal PM, Laliberte N, Li K, O'Shaughnessy M, Schechter M. Risk factors for HIV and HCV prevalence and incidence among young injection drug users in a Canadian city coping with an epidemic. Paper presented at: 11th Annual Canadian Conference on HIV/AIDS Research; April 25–28, 2002; Winnipeg, Manitoba, Canada.
- 34.Poulin C, Single E, Fralick P. Canadian Community Epidemiology Network on Drug Use (CCENDU): Second National Report. Ottawa, Ontario, Canada: Canadian Centre on Substance Abuse; 1999. [Google Scholar]
- 35.Serfaty MA, Lawrie A, Smith B, et al. Risk factors and medical follow-up of drug users tested for hepatitis C—can the risk of transmission be reduced. Drug Alcohol Rev. 1997;16:339–347. doi: 10.1080/09595239700186721. [DOI] [PubMed] [Google Scholar]
- 36.Meili D, Marcinko J, Bertisch-Moellenhoff B, et al. Possible transmission routes of viral diseases during communal preparation of drugs for i.v. use. Suchttherapie. 2002;3:S20–S26. doi: 10.1055/s-2002-32763. [DOI] [Google Scholar]
- 37.Hahn JA, Page-Shafer K, Lum PJ, et al. Hepatitis C virus seroconversion among young injection drug users: relationships and risks. J Infect Dis. 2002;186:1558–1564. doi: 10.1086/345554. [DOI] [PubMed] [Google Scholar]
- 38.Bourgois P, Bruneau J. Needle exchange, HIV infection, and the politics of science: confronting Canada's cocaine injection epidemic with participant observation. Med Anthropol. 2000;18:325–350. [Google Scholar]
- 39.Short L, Bell D. Risk of occupational infection with blood-borne pathogens in operating and delivery-room settings. Am J Infect Control. 1993;21:343–350. doi: 10.1016/0196-6553(93)90400-X. [DOI] [PubMed] [Google Scholar]
- 40.Moss AR, Hahn JA. Invited commentary: needle exchange—no help for hepatitis? Am J Epidemiol. 1999;149:214–216. doi: 10.1093/oxfordjournals.aje.a009793. [DOI] [PubMed] [Google Scholar]
- 41.Wood E, Tyndall MW, Spittal PM, et al. Unsafe injection practices in a cohort of injection drug users in Vancouver: could safer injecting rooms help? CMAJ. 2001;165:405–410. [PMC free article] [PubMed] [Google Scholar]
- 42.Thomas DL, Vlahov D, Solomon L, et al. Correlates of hepatitis C virus infections among injection drug users. Medicine. 1995;74:212–220. doi: 10.1097/00005792-199507000-00005. [DOI] [PubMed] [Google Scholar]
- 43.Porter J, Bonilla L, Drucker E. Methods of smoking crack as a potential risk factor for HIV infection: crack smokers' perceptions and behavior. Contemp Drug Probl. 1997;24:219–347. [Google Scholar]
- 44.Archibald CP, Ofner M, Strathdee SA, et al. Factors associated with frequent needle exchange program attendance in injection drug users in Vancouver, Canada. J Acquir Immune Defic Syndr. 1998;17:160–166. doi: 10.1097/00042560-199802010-00010. [DOI] [PubMed] [Google Scholar]
- 45.Kwiatkowski CF, Corsi KF, Booth RE. The association between knowledge of hepatitis C virus status and risk behaviors in injection drug users. Addiction. 2002;97:1289–1294. doi: 10.1046/j.1360-0443.2002.00208.x. [DOI] [PubMed] [Google Scholar]
- 46.Davis GL, Esteban-Mur R, Rustgi VK, et al. Interferon alfa-2b alone or in combination with ribavirin for the treatment of relapse of chronic hepatitis C. N Engl J Med. 1998;339:1493–1499. doi: 10.1056/NEJM199811193392102. [DOI] [PubMed] [Google Scholar]
- 47.Diepolder HM, Zachoval R, Hoffmann RM, Junge MC, Gerlach T, Pape GR. The role of hepatitis C virus specific CD4+ lymphocytes in acute and chronic hepatitis. J Mol Med. 1996;74:583–588. doi: 10.1007/s001090050062. [DOI] [PubMed] [Google Scholar]
- 48.Tubaro E, Santiangeli C, Belogi L, et al. Methadone versus morphine: comparison of their effect on phagocytic functions. Int J Immunopharmacol. 1987;9:79–88. doi: 10.1016/0192-0561(87)90113-5. [DOI] [PubMed] [Google Scholar]
- 49.Cushman P, Gupta S, Grieco MH. Immunological studies in methadone maintained patients. Int J Addict. 1977;12:241–253. doi: 10.3109/10826087709027222. [DOI] [PubMed] [Google Scholar]
- 50.Pellegrino T, Bayer BM. In vivo effects of cocaine on immune cell function. J Neuroimmunol. 1998;83:139–147. doi: 10.1016/S0165-5728(97)00230-0. [DOI] [PubMed] [Google Scholar]
- 51.Roy E, Haley N, Leclerc P, Boivin J-F, Cedras L, Vincelette J. Risk factors for hepatitis C virus infection among street youths. CMAJ. 2001;165:557–560. [PMC free article] [PubMed] [Google Scholar]
- 52.Mehta S, Cox A, Hoover D, et al. Protection against persistence of hepatitis C. Lancet. 2002;359:1478–1483. doi: 10.1016/S0140-6736(02)08435-0. [DOI] [PubMed] [Google Scholar]
- 53.Dore G, Freeman A, Kaldor J. Immunity against hepatitis C virus infection. Lancet. 2002;360:1019–1020. doi: 10.1016/S0140-6736(02)11102-0. [DOI] [PubMed] [Google Scholar]
- 54.Post J, Freeman A, Harvey C, French R, Lloyd A. Immunity against hepatitis C virus infection. Lancet. 2002;360:1020–1020. doi: 10.1016/S0140-6736(02)11103-2. [DOI] [PubMed] [Google Scholar]
- 55.El-Serag H, Bhupinderjut A, Richardson P, Rabeneck L. Association between hepatitis C infection and other infectious diseases: a case for targeted screening. Am J Gastroenterol. 2003;98:167–174. doi: 10.1111/j.1572-0241.2003.07176.x. [DOI] [PubMed] [Google Scholar]
- 56.Thomas DL. Hepatitis C and human immunodeficiency virus infection. Hepatology. 2002;36:S201–S209. doi: 10.1002/hep.1840360726. [DOI] [PubMed] [Google Scholar]
- 57.Sulkowski MS, Mast EE, Seeff LB, Thomas DL. Hepatitis C virus infection as an opportunistic disease in persons infected with human immunodeficiency virus. Clin Infect Dis. 2000;30:S77–S84. doi: 10.1086/313842. [DOI] [PubMed] [Google Scholar]
- 58.Vento S, Cainelli F. Does hepatitis C virus cause severe liver disease only in people who drink alcohol? Lancet Infect Dis. 2002;2:303–309. doi: 10.1016/S1473-3099(02)00271-2. [DOI] [PubMed] [Google Scholar]
- 59.Dieperink E, Willenbring M, Ho SB. Neuropsychiatric symptoms associated with hepatitis C and interferon alpha: a review. Am J Psychiatry. 2000;157:867–876. doi: 10.1176/appi.ajp.157.6.867. [DOI] [PubMed] [Google Scholar]
- 60.Booth RE, Kwiatkowski CF, Chitwood DD. Sex related HIV risk behaviors: differential risks among injection drug users, crack smokers, and injection drug users who smoke crack. Drug Alcohol Depena. 2000;58:219–226. doi: 10.1016/S0376-8716(99)00094-0. [DOI] [PubMed] [Google Scholar]
- 61.Ottaway CA, Erickson PG. Frequent medical visits by cocaine-using subjects in a Canadian community: an invisible problem for health practitioners? J Subst Abuse Treat. 1997;14:423–429. doi: 10.1016/S0740-5472(97)00017-2. [DOI] [PubMed] [Google Scholar]
- 62.Palepu A, Strathdee SA, Hogg RS, et al. The social determinants of emergency department and hospital use by injection drug users in Canada. J Urban Health. 1999;76:409–418. doi: 10.1007/BF02351499. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 63.Terrault NA. Sexual activity as a risk factor for hepatitis C. Hepatology. 2002;36:S99–S105. doi: 10.1002/hep.1840360713. [DOI] [PubMed] [Google Scholar]
- 64.Romanowski B, Preiksaitis J, Campbell P, Fenton J. Hepatitis C seroprevalence and risk behaviors in patients attending sexually transmitted disease clinics. Sex Transm Dis. 2003;30:33–38. doi: 10.1097/00007435-200301000-00008. [DOI] [PubMed] [Google Scholar]
- 65.Fuller CM, Vlahov D, Ompad DC, Shah N, Arria A, Strathdee SA. High-risk behaviors associated with transition from illicit non-injection to injection drug use among adolescent and young adult drug users: a case-control study. Drug Alcohol Depend. 2002;66:189–198. doi: 10.1016/S0376-8716(01)00200-9. [DOI] [PubMed] [Google Scholar]
- 66.Myers T, Millson M, Rigby J, et al. A comparison of the determinants of safe injecting and condom use among injecting drug users. Addiction. 1995;90:217–226. doi: 10.1111/j.1360-0443.1995.tb01039.x. [DOI] [PubMed] [Google Scholar]
- 67.Inciardi JA. The Miami sex-for-crack market. In: Ratner MS, editor. Crack Pipe as Pimp: an Ethnographic Investigation of Sex-for-Crack Exchanges. New York: Lexington Books; 1993. pp. 36–68. [Google Scholar]
- 68.Hwang L-Y, Ross MW, Zack C, Bull L, Rickman K, Holleman M. Prevalence of sexually transmitted infections and associated risk factors among populations of drug abusers. Clin Infect Dis. 2000;31:920–926. doi: 10.1086/318131. [DOI] [PubMed] [Google Scholar]
- 69.Haydon E, Fischer B, Strike C, Rehm J, Millson P. Crack Use and Hepatitis C in Canada: a Review of Research Evidence and Questions. Ottawa, Ontario, Canada: Health Canada; 2002. [Google Scholar]
- 70.Evans R, Barer M, Marmor T. Why Are Some People Healthy and Others Not? New York: A. de Gruyter; 1994. [Google Scholar]
- 71.Injection Drug Use and HIV: Legal and Ethical Issues. Montreal, Quebec, Canada: Canadian HIV/AIDS Legal Network; 1999. [Google Scholar]
- 72.Page-Shafer KA, Cahoon-Young B, Klausner JD, et al. Hepatitis C virus infection in young, low-income women: the role of sexually transmitted infection as a potential cofactor for HCV infection. Am J Public Health. 2002;92:670–676. doi: 10.2105/ajph.92.4.670. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 73.Logan TK, Leukefeld C. Sexual and drug use behaviors among female crack uers: a multi-site sample. Drug Alcohol Depend. 2000;58:237–245. doi: 10.1016/S0376-8716(99)00096-4. [DOI] [PubMed] [Google Scholar]
- 74.Schroeder JR, Latkin CA, Hoover DR, Curry AD, Knowlton AR, Celetano DD. Illicit drug use in one's social network and in one's neighborhood predicts individual heroin and cocaine use. Ann Epidemiol. 2001;11:389–394. doi: 10.1016/S1047-2797(01)00225-3. [DOI] [PubMed] [Google Scholar]
- 75.Lovell AM. Risking risk: the influence of types of capital and social networks on the injection practices of drug users. Soc Sci Med. 2002;55:803–821. doi: 10.1016/S0277-9536(01)00204-0. [DOI] [PubMed] [Google Scholar]
- 76.Mandell W, Vlahov D, Latkin C, Oziemkowska M, Cohn S. Correlates of needle sharing among injection drug users. Am J Public Health. 1994;84:920–924. doi: 10.2105/ajph.84.6.920. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 77.Sherman S, Latkin C, Gielen A. Social factors related to syringe sharing among injecting partners: a focus on gender. Subst Use Misuse. 2001;36:2113–2136. doi: 10.1081/JA-100108439. [DOI] [PubMed] [Google Scholar]
- 78.Patrick D, Strathdee SA, Archibald CP, et al. Determinants of HIV seroconversion in injection drug users during a period of rising prevalence in Vancouver. Int J STD AIDS. 1997;8:437–445. doi: 10.1258/0956462971920497. [DOI] [PubMed] [Google Scholar]
- 79.Harvey E, Strathdee S, Patrick D, et al. A qualitative investigation into an HIV outbreak among injection drug users in Vancouver, British Columbia. AIDS Care. 1998;10:313–321. doi: 10.1080/713612412. [DOI] [PubMed] [Google Scholar]
- 80.Latkin CA, Mandell W, Vlahov D, Oziemkowska M, Celetano DD. People and places: behavioral settings and personal network characteristics as correlates of needle sharing. J Acquir Immun Defic Syndr. 1996;13:273–280. doi: 10.1097/00042560-199611010-00010. [DOI] [PubMed] [Google Scholar]
- 81.Strathdee S, Patrick D, Archibald CP, et al. Social determinants predict needle-sharing behaviour among injection drug users in Vancouver, Canada. Addiction. 1997;92:1339–1347. doi: 10.1111/j.1360-0443.1997.tb02852.x. [DOI] [PubMed] [Google Scholar]
- 82.Estrada AL. Epidemiology of HIV/AIDS, hepatitis B, hepatitis C and tuberculosis among minority injection drug users. Public Health Rep. 2002;117:S126–S134. [PMC free article] [PubMed] [Google Scholar]
- 83.Craib KJP, Spittal PM, Wood E, et al. Risk factors for elevated HIV incidence among Aboriginal injection drug users in Vancouver. CMAJ. 2003;68:19–24. [PMC free article] [PubMed] [Google Scholar]
- 84.Zeuzem S, Feinman SV, Rasenack J, et al. Peginterferon alfa-2a in patients with chronic hepatitis C. N Engl J Med. 2000;343:1666–1672. doi: 10.1056/NEJM200012073432301. [DOI] [PubMed] [Google Scholar]
- 85.Fried M, Shiffman M, Reddy K, et al. Peginterferon alfa-2a plus ribavirin for chronic hepatitis C virus infection. N Engl J Med. 2002;347:975–982. doi: 10.1056/NEJMoa020047. [DOI] [PubMed] [Google Scholar]
- 86.Nolte FS. Hepatitis C virus genotyping: clinical implications and methods. Mol Diagn. 2001;6:265–277. doi: 10.1054/modi.2001.29157. [DOI] [PubMed] [Google Scholar]
- 87.Chaudhary RK, Tepper M, Eisaadany S, Gully PR. Distribution of hepatitis C genotypes in Canada: results from the LCDC sentinel health unit surveillance system. Can J Infect Dis. 1999;10:53–56. doi: 10.1155/1999/918478. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 88.Kleter B, Brouwer JT, Nevens F, et al. Hepatitis C virus genotypes: epidemiological and clinical associations. Liver. 1998;18:32–38. [PubMed] [Google Scholar]
- 89.Bourlière M, Barberin JM, Rotily M, et al. Epidemiological changes in hepatitis C virus genotypes in France: evidence in intravenous drug users. J Viral Hepat. 2002;9:62–70. doi: 10.1046/j.1365-2893.2002.00319.x. [DOI] [PubMed] [Google Scholar]
- 90.Andonov A, Chaudhary RK. Genotyping of Canadian hepatitis C virus isolates by PCR. J Clin Microbiol. 1994;32:2031–2034. doi: 10.1128/jcm.32.8.2031-2034.1994. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 91.Abraham HD, Degli-Esposti S, Marino L. Seroprevalence of hepatitis C in a sample of middle class substance abusers. J Addict Dis. 1999;18:77–87. doi: 10.1300/J069v18n04_07. [DOI] [PubMed] [Google Scholar]
- 92.Ramalho R, Costa A, Pires A, et al. Correlation of genotypes and route of transmission with histologic activity and disease stage in chronic hepatitis C. Dig Dis Sci. 2000;45:182–187. doi: 10.1023/A:1005442317680. [DOI] [PubMed] [Google Scholar]
- 93.Poynard T, Marcellin P, Lee SS, et al. Randomised trial of interferon alpha2b plus ribavirin for 48 weeks or for 24 weeks versus interferon alpha2b plus placebo for 48 weeks for treatment of chronic infection with hepatitis C virus. Lancet. 1998;352:1426–1432. doi: 10.1016/S0140-6736(98)07124-4. [DOI] [PubMed] [Google Scholar]
- 94.Fried MW, Shiffman ML, Reddy RK, et al. Pegylated (40 kDa) interferon alfa-2a (Pegasys) in combination with ribavirin: efficacy and safety results from a phase III, randomised, actively controlled, multi-center study. Gastroenterology. 2001;5:55–55. [Google Scholar]
- 95.Manns MP, McHutchison JG, Gordon SC, et al. Peginterferon alfa-2b plus ribavirin compared with interferon alfa-2b plus ribavirin for initial treatmett of chronic hepatitis C: a randomised trial. Lancet. 2001;358:958–965. doi: 10.1016/S0140-6736(01)06102-5. [DOI] [PubMed] [Google Scholar]
- 96.Neuman MG, Monteiro M, Rehm J. Drug interactions between psychoactive substances and antiretroviral therapy in individuals infected with human immunodeficiency and hepatitis C viruses. AIDS. In press. [DOI] [PubMed]
- 97.Bhattacharya R, Shuhart M. Hepatitis C and alcohol: interactions, outcomes and implications. J Clin Gastroenterol. 2003;36:242–252. doi: 10.1097/00004836-200303000-00012. [DOI] [PubMed] [Google Scholar]
- 98.Mueser K, Yarnold P, Bellack A. Diagnostic and demographic correlates of substance abuse in schizophrenia and major affective disorder. Acta Psychiatry Scand. 1992;85:48–55. doi: 10.1111/j.1600-0447.1992.tb01441.x. [DOI] [PubMed] [Google Scholar]
- 99.Brown R, Monti P, Myers M, et al. Depression among cocaine abusers in treatment: relation to cocaine and alcohol use and treatment outcome. Am J Psychiatry. 1998;155:220–225. doi: 10.1176/ajp.155.2.220. [DOI] [PubMed] [Google Scholar]
- 100.Flynn P, Craddock S, Luckey J, Hubbard R, Dunteman G. Comorbidity of antiosocial personality and mood disorders among psychoative substance-dependent treatment clients. J Personal Disord. 1996;10:56–67. [Google Scholar]
- 101.Weiss R, Martinez-Raga J, Hufford C. The significance of a coexisting opioid use disorder in cocaine dependence: an empirical study. Am J Drug Alcohol Abuse. 1996;22:173–184. doi: 10.3109/00952999609001652. [DOI] [PubMed] [Google Scholar]
- 102.Magura S, Kang S-Y, Nwakeze P, Demsky S. Temporal patterns of heroin and cocaine use among methadone patients. Subst Use Misuse. 1998;33:2441–2467. doi: 10.3109/10826089809059334. [DOI] [PubMed] [Google Scholar]
- 103.Krausz M, Degkwitz P, Kuhne A, Verthein U. Comorbidity of opiate dependence and mental disorders. Addict Behav. 1998;23:767–783. doi: 10.1016/S0306-4603(98)00099-9. [DOI] [PubMed] [Google Scholar]
- 104.Marlowe D, Husband S, Lamb R, Kirby K, Iguchi M, Platt J. Psychiatric comorbidity in cocaine dependence. Diverging trends, axis II spectrum, and gender differnetials. Am J Addict. 1995;4:70–81. [Google Scholar]
- 105.Khantzian E. The self-medication hypothesis of addictive disorders: focus on heroin and cocaine dependence. Am J Psychiatry. 1985;142:1264–1264. doi: 10.1176/ajp.142.11.1259. [DOI] [PubMed] [Google Scholar]
- 106.Murphy S, Khantzian E. Addiction as a “self-medication” disorder: application of ego psychology to the treatment of substance abuse. In: Washton A, editor. Psychotherapy and Substance Abuse: a Practitioner's Handbook. London: Guilford Press; 1995. pp. 161–175. [Google Scholar]
- 107.Khantzian E. The self-medication hypothesis of substance use disorders: a reconsideration and recent applications. Harv Rev Psychiatry. 1997;4:231–224. doi: 10.3109/10673229709030550. [DOI] [PubMed] [Google Scholar]
- 108.Gutfreund KS, Bain VG. Chronic viral hepatitis C: management update. CMAJ. 2000;162:827–833. [PMC free article] [PubMed] [Google Scholar]
- 109.Crofts N, Louie R, Loff B. The next plague: stigmatization and discrimination related to hepatitis C virus infection in Australia. Health Hum Rights. 1997;2:2–2. [PubMed] [Google Scholar]
- 110.Treloar CJ, Hopwood MN, Loveday SK. Hepatitis C-related discrimination in health-care. Med J Aust. 2002;177:233–234. doi: 10.5694/j.1326-5377.2002.tb04753.x. [DOI] [PubMed] [Google Scholar]
- 111.Hagan H, Snyder N, Hough E, et al. Case-reporting of acute hepatitis B and C among injection drug users. J Urban Health. 2002;79:579–585. doi: 10.1093/jurban/79.4.579. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 112.Edlin BR, Seal KH, Lorvick J, et al. Is it justifiable to withhold treatment for hepatitis C from illicit-drug users? N Engl J Med. 2001;345:211–214. doi: 10.1056/NEJM200107193450311. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 113.National Institutes of Health Management of hepatitis C. NIH Consens Statement Online. 1997;15:1–41. [PubMed] [Google Scholar]
- 114.Heathcote JE, Yim C, Thai Q, Sherker A. Your Personal Health Series (Canadian Medical Association): Hepatitis C. Toronto, Ontario, Canada: Key Porter Books; 2001. [Google Scholar]
- 115.Fleming CA, Craven De, Thornton D, Tumilty S, Nunes D. Hepatitis C virus and human immunodeficiency virus coinfection in an urban population: low eligibility for interferon treatment. Clin Infect Dis. 2003;36:97–100. doi: 10.1086/344907. [DOI] [PubMed] [Google Scholar]
- 116.Huber M, Schmid P, Vernazza P, Meili D. Reasons for the lack of treatment of hepatitis C infection in drug dependent patients in opiate substitution. Suchttherapie. 2002;3:S27–S30. doi: 10.1055/s-2002-32773. [DOI] [Google Scholar]
- 117.Berkman LF, Kawachi I. A historical framework for social epidemiology. In: Berkman LF, Kawachi I, editors. Social Epidemiology. Oxford, UK: Oxford University Press; 2000. pp. 3–12. [Google Scholar]
- 118.Davis GL, Rodrigue JR. Treatment of chronic hepatitis C in active drug users. Engl J Med. 2001;345:215–217. doi: 10.1056/NEJM200107193450312. [DOI] [PubMed] [Google Scholar]
- 119.Bisceglie AM, Hoofnagle JH. Optimal therapy of hepatitis C. Hepatology. 2002;36:S121–S127. doi: 10.1002/hep.1840360716. [DOI] [PubMed] [Google Scholar]
- 120.Chander G, Sulkowski MS, Jenckes MW, et al. Freatment of chronic hepatitis C: a systematic review. Hepatology. 2002;36:S135–S144. doi: 10.1002/hep.1840360718. [DOI] [PubMed] [Google Scholar]
- 121.Schaefer M. Neuro-psychiatric side effects of interferon-alpha in drug addicts: reasons, frequency and therapy. Suchttherapie. 2002;3:S72–S77. doi: 10.1055/s-2002-32771. [DOI] [Google Scholar]
- 122.Management of Hepatitis C: Final Statement. Washington, DC: National Institutes of Health; 2002. [Google Scholar]
- 123.Siebert U, Sroczynski G, Rossol S, et al. Cost effectiveness of peginterferon-2b plus ribavirin versus interferon-2b plus ribavirin for initial treatment of chronic hepatitis C. Gut. 2003;52:425–432. doi: 10.1136/gut.52.3.425. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 124.Salomon J, Weinstein M, Hammitt J, Goldie S. Cost-effectiveness of treatment for chronic hepatitis C infection in an evolving patient population. JAMA. 2003;290:228–237. doi: 10.1001/jama.290.2.228. [DOI] [PubMed] [Google Scholar]
- 125.Sagmeister M, Wong JB, Mullhaupt B, Renner EL. A pragmatic and cost-effective strategy of a combination therapy of interferon alpha-2b and ribavirin for the treatment of chronic hepatitis C. Eur J Gastroenterol Hepatol. 2001;13:483–488. doi: 10.1097/00042737-200105000-00004. [DOI] [PubMed] [Google Scholar]
- 126.Backmund M. Interferon therapy and detoxification treatment. Suchttherapie. 2002;3:S67–S71. doi: 10.1055/s-2002-32770. [DOI] [Google Scholar]
- 127.Backmund M, Meyer K, Zielonka M, Eichenlaub D. Treatment of hepatitis C infection in injection drug users. Hepatology. 2001;34:188–193. doi: 10.1053/jhep.2001.25882. [DOI] [PubMed] [Google Scholar]
- 128.Neri S, Bruno CM, Abate G, et al. Controlled clinical trial to assess the response of recent heroin abusers with chronic hepatitis C virus infection to treatment with interferon alpha-n2b. Clin Ther. 2002;24:1627–1635. doi: 10.1016/S0149-2918(02)80065-0. [DOI] [PubMed] [Google Scholar]
- 129.Schaefer M, Schmidt F, Folwaczny C, et al. Adherence and mental side effects during hepatitis C treatment with interferon alfa and ribavirin in psychiatric risk groups. Hepatology. 2003;37:443–451. doi: 10.1053/jhep.2003.50031. [DOI] [PubMed] [Google Scholar]
- 130.Sylvestre DL. Treating hepatitis C in methadone maintenance patients: an interim analysis. Drug Alcohol Depend. 2002;67:117–123. doi: 10.1016/S0376-8716(02)00010-8. [DOI] [PubMed] [Google Scholar]
- 131.Dalgard O, Bjoro K, Hellum K, et al. Treatment of chronic hepatitis C in injection drug users: 5 years' follow-up. Eur Addict Res. 2002;8:45–49. doi: 10.1159/000049487. [DOI] [PubMed] [Google Scholar]
- 132.Bickel W, Vuchinich R. Reframing Health Behavior Change With Behavioral Economics. Mahwah, NJ: Erlbaum; 2000. [Google Scholar]
- 133.The World Health Report 2002: Reducing Risks, Promoting Healthy Life. Geneva, Switzerland: World Health Organization; 2002. [DOI] [PubMed] [Google Scholar]
- 134.Stein M, Maksad J, Clarke J. Hepatitis C disease among injection drug users: knowledge, perceived risk and willingness to receive treatment. Drug Alcohol Depend. 2001;61:211–215. doi: 10.1016/S0376-8716(00)00144-7. [DOI] [PubMed] [Google Scholar]
- 135.Edlin BR. Prevention and treatment of hepatitis C in injection drug users. Hepatology. 2002;36:S210–S219. doi: 10.1002/hep.1840360727. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 136.Strathdee S, Ameijden EJ, Mesquita F, Wodak A, Rana S, Vlahov D. Can HIV epidemics among injection drug users be prevented? AIDS. 1998;12:S71–S79. doi: 10.1097/00002030-199808000-00003. [DOI] [PubMed] [Google Scholar]
- 137.Broadhead RS, Heckathorn DD, Weakliem DL, et al. Harnessing peer networks as an instrument for AIDS prevention: results from a peer-driven intervention. Public Health Rep. 1998;113:42–57. [PMC free article] [PubMed] [Google Scholar]
- 138.Fischer B, Rehm J, Blitz-Miller T. Injection drug use and preventive measures: a comparison of Canadian and Western European jurisdictions over time. CMAJ. 2000;162:1709–1713. [PMC free article] [PubMed] [Google Scholar]
- 139.Brands J, Brands B, Marsh D. The expansion of methadone prescribing in Ontario, 1996–1997. Addict Res Theory. 2000;8:485–496. [Google Scholar]
- 140.McHutchison JG, Manns M, Patel K, et al. Adherence to combination therapy enhances sustained response in genotype-1-infected patients with chronic hepatitis C. Gastroenterology. 2002;123:1061–1069. doi: 10.1053/gast.2002.35950. [DOI] [PubMed] [Google Scholar]
- 141.Marco A, Cayla JA, Serra M, et al. Predictors of adherence to tuberculosis treatment in a supervised therapy programme for prisoners before and after release. Eur Respirol J. 1998;12:967–971. doi: 10.1183/09031936.98.12040967. [DOI] [PubMed] [Google Scholar]
- 142.Gourevitch MN, Wasserman W, Panero MS, Selwyn PA. Successful adherence to observed prophylaxis and treatment of tuberculosis among drug users in a methadone program. J Addict Dis. 1996;15:93–104. doi: 10.1300/J069v15n01_07. [DOI] [PubMed] [Google Scholar]
- 143.Renault P, Hoofnagle JH, Park Y, et al. Psychiatric complications of long-term interferon alfa therapy. Arch Intern Med. 1987;147:1577–1580. doi: 10.1001/archinte.147.9.1577. [DOI] [PubMed] [Google Scholar]
- 144.Fried MW. Side effects of therapy of hepatitis C and their management. Hepatology. 2002;36:S237–S244. doi: 10.1002/hep.1840360730. [DOI] [PubMed] [Google Scholar]
- 145.Frei A, Rehm J. Die Prävalenz psychischer Komorbidität unter Opiatabhängigen: eine Metaanalyse bisheriger Studien. Psychiatr Prax. 2002;29:258–262. doi: 10.1055/s-2002-32713. [DOI] [PubMed] [Google Scholar]
- 146.Thiel DH, Friedlander L, Maria N, Molloy PJ, Kania RJ, Colantoni A. Treatment of chronic hepatitis C in individuals with pre-existing or confounding neuropsychiatric disease. Hepatogastroenterology. 1998;45:328–330. [PubMed] [Google Scholar]
- 147.Musselman DL, Lawson DH, Gunnick JF, et al. Paroxetine for the prevention of depression induced by high-dose interferon alfa. N Engl J Med. 2001;344:961–966. doi: 10.1056/NEJM200103293441303. [DOI] [PubMed] [Google Scholar]
- 148.Kraus MR, Schafer A, Scheurlen M, Miller AH, Musselman DL, Nemeroff CB. Paroxetine for the prevention of depression induced by high-dose interferon alfa. N Engl J Med. 2001;345:375–376. doi: 10.1056/NEJM200108023450514. [DOI] [PubMed] [Google Scholar]
- 149.Leshner A. Addiction is a brain disease, and it matters. Science. 1997;278:45–47. doi: 10.1126/science.278.5335.45. [DOI] [PubMed] [Google Scholar]
- 150.Hagan H, DesJarlais DC, Freidman SR, Purchase D, Alter M.J. Reduced risk of hepatitis B and hepatitis C among injection drug users in the Tacoma syringe exchange program. Am J Public Health. 1995;85:1531–1537. doi: 10.2105/ajph.85.11.1531. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 151.Trautmann F. Peer support as a method of risk reduction in injection drug-user communities: experiences in Dutch projects and the “European peer support project”. J Drug Issues. 1995;25:617–628. [Google Scholar]
- 152.Hankins C. Syringe exchange in Canada: good but not enough to stem the HIV tide. Subst Use Misuse. 1998;33:1129–1145. doi: 10.3109/10826089809062211. [DOI] [PubMed] [Google Scholar]
- 153.Fischer B, Rehm J, Kim G, Robins A. Safer injection facilities (SIFs) for injection drug users (IDUs) in Canada: a review and call for an evidence-focused pilot trial. Can J Public Health. 2002;93:336–338. doi: 10.1007/BF03404564. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 154.Dolan K, Kimber J, Fry C, Fitzgerald J, McDonald D, Trautmann F. Drug consumption facilities in Europe and the establishment of supervised injecting centres in Australia. Drug Alcohol Rev. 2000;19:337–346. [Google Scholar]
- 155.Heimer R, Clair S, Grau LE, et al. Hepatitis-related knowledge is low and risks are high among HIV-aware injection drug users in three US cities. Addiction. 2002;97:1277–1287. doi: 10.1046/j.1360-0443.2002.t01-1-00211.x. [DOI] [PubMed] [Google Scholar]
- 156.Sorensen JL, Copeland AL. Drug abuse treatment as an HIV prevention strategy. Drug Alcohol Depend. 2000;59:17–31. doi: 10.1016/S0376-8716(99)00104-0. [DOI] [PubMed] [Google Scholar]
- 157.Marsch L. The efficacy of methadone maintenance interventions in reducing opiate use, HIV risk behavior and criminality: a meta-analysis. Addiction. 1998;93:515–532. doi: 10.1046/j.1360-0443.1998.9345157.x. [DOI] [PubMed] [Google Scholar]
- 158.Woodward A, Kawachi I. Why reduce health inequalities? J Epidemiol Community Health. 2000;54:923–929. doi: 10.1136/jech.54.12.923. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 159.Link BG, Phelan J. Social conditions as fundamental causes of disease. J Health Soc Behav. 1995;35:80–94. doi: 10.2307/2626958. [DOI] [PubMed] [Google Scholar]
- 160.Study on Assistance to Drug Users in Prisons. Lisbon, Portugal: European Monitoring Centre for Drugs and Drug Addiction; 2001. [Google Scholar]
- 161.Glannon W. Responsibility, alcoholism, and liver transplantation. J Med Philos. 1998;23:31–49. doi: 10.1076/jmep.23.1.31.2595. [DOI] [PubMed] [Google Scholar]
- 162.Caplan AL. Ethics of casting the first stone: personal responsibility, rationing and transplants. Alcohol Clin Exp Res. 1994;18:219–221. doi: 10.1111/j.1530-0277.1994.tb00002.x. [DOI] [PubMed] [Google Scholar]
- 163.Rehm J, Fischer B, Haydon E, Room R. Abstinence ideology and somatic treatment for addicts—ethical considerations. Addict Res Theory. 2003;11:287–293. doi: 10.1080/1606635031000101494. [DOI] [Google Scholar]
- 164.Remis R. Estimating the incidence and prevalence of hepatitis C in Canada. Presented at the Second Canadian Conference on Hepatitis C: New Knowledge, New Hope, Vancouver, BC, March 27–30, 2004.
- 165.Sherman M, Bain V, Villeneuve J-P, et al. Management of Viral Hepatitis: A Canadian Consensus Conference. Toronto; 2004.