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Author: Kachit Choopanya

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    Lack of increased HIV risk behavior among injection drug users participating in the AIDSVAX®B/E HIV vaccine trial in Bangkok, Thailand
    (2004-01-23) Frits Van Griensven; Jaranit Keawkungwal; Jordan W. Tappero; Udomsak Sangkum; Punnee Pitisuttithum; Suphak Vanichseni; Pravan Suntharasamai; Karin Orelind; Carolyn Gee; Kachit Choopanya; Thailand Ministry of Public Health; Mahidol University; Bangkok Metropolitan Administration; Bangkok Vaccine Evaluation Group; Centers for Disease Control and Prevention; VaxGen, Inc.
    . At baseline, 61.3% were receiving methadone detoxification and 20.9% were receiving methadone maintenance. From baseline to the 12-month follow-up visit, injection drug use decreased from 93.8% to 66.5% (P < 0.001) and needle sharing from 33.0% to 17.5% (P< 0... (at baseline), younger age, and injection of methamphetamine and midazolam were associated with more-frequent needle sharing; methadone treatment and injecting less than weekly were associated with less-frequent needle sharing. Conclusions: Injection drug use
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    Factors associated with incarceration and incident human immunodeficiency virus (HIV) infection among injection drug users participating in an HIV vaccine trial in Bangkok, Thailand, 1999-2003
    (2009-02-01) Pravan Suntharasamai; Michael Martin; Suphak Vanichseni; Frits Van Griensven; Philip A. Mock; Punnee Pitisuttithum; Jordan W. Tappero; Udomsak Sangkum; Dwip Kitayaporn; Marc Gurwith; Kachit Choopanya; Mahidol University; Thailand Ministry of Public Health; National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention; Bangkok Vaccine Evaluation Group; Centers for Disease Control and Prevention; Bangkok Metropolitan Administration; Bumrungrad International Hospital; VaxGen, Inc.; Ministry of Public Healthy
    .0001) and sharing needles (P = 0.02) were associated with HIV infection and methadone maintenance was protective (P = 0.0006). Predictors of incarceration in multivariable analysis included: male sex (P = 0.04), younger age (P < 0.0001), less education (P = 0... prevention tools are needed urgently. HIV prevention services, including methadone, should be made available to IDUs. © 2009 The Authors.
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    Continued high HIV-1 incidence in a vaccine trial preparatory cohort of injection drug users in Bangkok, Thailand
    (2001-02-16) Suphak Vanichseni; Dwip Kitayaporn; Timothy D. Mastro; Philip A. Mock; Suwanee Raktham; Don C.Des Jarlais; Sathit Sujarita; La Ong Srisuwanvilai; Nancy L. Young; Chantapong Wasi; Shambavi Subbarao; William L. Heyward; José Esparza; Kachit Choopanya; Bangkok Metropolitan Administration; HIV/AIDS Collaboration; Mahidol University; Centers for Disease Control and Prevention; Beth Israel Medical Center; UNAIDS; VaxGen, Inc.; Thailand Ministry of Public Health
    of HIV-1 infection and related risk factors to guide prevention efforts and to evaluate the feasibility of conducting an HIV vaccine efficacy trial. Design and methods: A prospective cohort study in which IDUs attending methadone treatment programs... was not associated with increased risk for HIV-1. Risk factors for infection with HIV-1 subtypes E and B were similar. Conclusion: HIV-1 transmission risk remains high among Bangkok IDUs despite methadone treatment and other current prevention strategies
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    Trends in the injection of midazolam and other drugs and needle sharing among injection drug users enrolled in the AIDSVAX B/E HIV-1 vaccine trial in Bangkok, Thailand
    (2005-06-01) Frits Van Griensven; Punnee Pitisuttithum; Suphak Vanichseni; Paula Wichienkuer; Jordan W. Tappero; Udomsak Sangkum; Dwip Kitayaporn; Boonrawd Phasithiphol; Karin Orelind; Kachit Choopanya; Thailand Ministry of Public Health; Centers for Disease Control and Prevention; Mahidol University; Bangkok Vaccine Evaluation Group; VaxGen, Inc.
    ; younger age, reports of needle sharing and receiving methadone treatment were independently associated with more frequent midazolam injection. Preventive interventions to educate IDUs and midazolam prescribers are urgently needed. © 2005 Elsevier B.V. All
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    Viral load differences in early infection with two HIV-1 subtypes
    (2001-04-13) Dale J. Hu; Suphak Vanichseni; Timothy D. Mastro; Suwanee Raktham; Nancy L. Young; Philip A. Mock; Shambavi Subbarao; Bharat S. Parekh; La Ong Srisuwanvilai; Ruengpung Sutthent; Chantapong Wasi; Walid Heneine; Kachit Choopanya; National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention; Bangkok Metropolitan Administration; HIV/AIDS Collaboration; National Center for Infectious Diseases; Mahidol University
    and immunologic parameters following seroconversion among recently-infected persons infected with either of two different HIV-1 subtypes. Method: A prospective cohort study was carried out at methadone treatment clinics administered by the Bangkok Metropolitan