Theoretical concepts in combined hiv prevention programming
This presentation is the property of its rightful owner.
Sponsored Links
1 / 27

Theoretical concepts in combined hiv prevention programming PowerPoint PPT Presentation


  • 32 Views
  • Uploaded on
  • Presentation posted in: General

Theoretical concepts in combined hiv prevention programming . Don C. Des Jarlais Beth Israel Medical Center New York City, USA. Theoretical concepts in combined hiv prevention programming . Don C. Des Jarlais Beth Israel Medical Center New York City, USA.

Download Presentation

Theoretical concepts in combined hiv prevention programming

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Theoretical concepts in combined hiv prevention programming

Theoretical concepts in combined hiv prevention programming

Don C. Des Jarlais

Beth Israel Medical Center

New York City, USA


Theoretical concepts in combined hiv prevention programming1

Theoretical concepts in combined hiv prevention programming

Don C. Des Jarlais

Beth Israel Medical Center

New York City, USA


No one hiv prevention program eliminates risk behaviors

No one HIV prevention program eliminates risk behaviors


Different programs for different people

Different programs for Different people:

Drug dependence treatment for persons who cannot consistently obtain and use clean syringes


Risk elimination is not needed herd immunity

Risk elimination is not needed: herd Immunity

Outside of acute HIV infection, sharing syringes still inefficient for HIV transmission (1% probability per sharing act)

Sero-sorting, Partner Restriction, Informed Altruism


Needle syringe programs are foundation of combined programming

Needle/syringe programs are foundation of combined programming

How good are big needle/syringe programs?


Evidence for needle syringe programs an international review

Evidence for Needle/syringe programs: An international Review

Don C. Des Jarlais

Beth Israel Medical Center

New York City, USA


Acknowledgments

Acknowledgments

  • Beth Israel Medical Center: Jonathan Feelemyer, Shilpa Modi

  • Centers for Disease Control: Abu Abdul-Quader and Salaam Semaan

  • University of California, San Francisco: Ellen Stein, Gail Kennedy, Tara Horvath, Alya Briceno

  • NIAID Grant 0832035

  • NIDA Grant 003574


Preventing hiv epidemics among injection drug users idu

Preventing HIV Epidemics among Injection Drug Users (IDU)

  • Many successful SEP were started when HIV prevalence among injection drug users (IDU) was at a low level (less than 5%)

  • In almost all of these areas, HIV epidemics did not occur among IDUs, prevalence remained at less than 5%

  • Examples: Australia, the United Kingdom, New Zealand, Toronto Canada, and Seattle and Tacoma USA


Failures of syringe exchange programs

Failures of Syringe Exchange Programs

Dundee Scotland in the late 1980’s, staff were more focused on recruiting drug users into the treatment program, users stopped attending

Vancouver Canada in the early 90’s had a limited exchange policy including only 4 syringes per visit.

  • Cocaine epidemic occurred during same period

  • IDU with social and health problems were highly concentrated in one part of the city

    New York City First Program: too small, inconvenient


Framing the issue

Framing the Issue

  • Unused syringes distributed to injectors from manufacturers do not contain blood borne viruses

  • One of the main obstacles to needle exchange and distribution lies in the ability to distribute enough sterile needles and syringes to drug users at both the right time and at the right place

  • Structural level interventions need to be able to reach a majority of the IDU in the population; creating a “herd immunity” effect


Methods

Methods

  • Systematic literature review of structural level interventions involving SEP were conducted following Cochrane review protocol

  • Over 1200 abstracts screened and over 60 articles coded for eligibility; 14 articles met inclusion criteria

  • Strict inclusion of SEP coverage in study, defined as greater than 50% IDU coverage in a particular location

  • Four continents are represented in review (North America, Australia, Europe, and Asia)


Goldberg 1998 scotland

Goldberg 1998 (Scotland)


Hope 2005 uk

Hope 2005 (UK)


Des jarlais 2007 vietnam china

Des Jarlais 2007 (Vietnam, China)


Des jarlais 2005 b usa

Des Jarlais 2005(b) (USA)


Bruneau 2011 canada

Bruneau 2011 (Canada)

  • Study Design

  • location

  • Population

  • Intervention Coverage

  • Outcomes

  • Before/After Comparison

  • Vancouver Canada

  • IDU recruited from street and peer based settings: 1998-2003

  • Policies:

  • Health Authority authorizes syringe distribution: 2000-2002

  • Decentralization of SEP sites

  • Hotel based and street distribution in tandem with SEP

  • Coverage:

  • Needles Distributed Annually: 1.8 million

  • Population of IDU: 1400

  • Syringes distributed per IDU per year: 1400

  • Coverage of IDU: 89%

  • Adjusted Hazard Ratio (AHR) for HIV incidence comparing pre-SEP to post-SEP participants: 0.13

  • Effect Modifiers: None


Annual number of syringes exchanged new york city

Annual Number of Syringes Exchanged: New York City


Hiv incidence from starhs data new york city

HIV Incidence from STARHS Data: New York City


Theoretical concepts in combined hiv prevention programming

HIV Seroprevalence: New York City


Geographic setting of cross border project

Geographic Setting of Cross-Border Project

China

Ha Giang

Guigang

Area of Detail

Hanoi

Vietnam

China

Ning Ming City

Puzhai

Shilang

TanThanh

Aidian

Tongmian

Dong Dang

CaoLoc Town

Key:

Loc Binh

Hop Thanh

Large Project Site

Lang Son City

Vietnam

Small Border Site

PDI Site


Hiv incidence among new injectors by site

HIV Incidence Among New Injectors, by Site


Changes in biomarkers summary

Changes in Biomarkers: Summary


Results

Results

  • Studies included as part of this review show that locations with large SEPs are associated with lower levels of HCV and HIV among the entire sample populations (incidence and prevalence). Including persons who do not use the exchanges (herd immunity effect)

  • Syringe exchange may be effective at approximately 30 syringes per IDU per year


Best practices

Best Practices

  • Begin syringe programs early

  • Operations of syringe programs should be large scale with no limit on exchanges, encouragement of secondary exchange, and no strict one-for-one exchange limitations

  • Syringe programs should be user friendly, treating patients/participants with respect, convenient locations to known IDU populations, and hours of operation that are convenient


Best practices continued

Best Practices (continued)

  • Provide multiple services at the syringe programs including blood borne infection testing, condom distribution, and safe injecting equipment

  • Involve injectors as experts in the IDU community to assist with operations and distribution

  • Ensure initial and continued cooperation and non-interference with local law enforcement


References

References

  • Goldberg, D., Cameron, S., & McMenamin, J. (1998). Hepatitis C virus antibody prevalence among injecting drug users in Glasgow has fallen but remains high. Commun Dis Public Health, 1(2), 95-97.

  • Hope, V. D., Judd, A., Hickman, M., Sutton, A., Stimson, G. V., Parry, J. V., et al. (2005). HIV prevalence among injecting drug users in England and Wales 1990 to 2003: evidence for increased transmission in recent years. AIDS, 19(11), 1207-1214.

  • Des Jarlais, D. C., Kling, R., Hammett, T. M., Ngu, D., Liu, W., Chen, Y., et al. (2007). Reducing HIV infection among new injecting drug users in the China-Vietnam Cross Border Project. AIDS, 21 Suppl 8, S109-114.

  • Des Jarlais, D. C., Perlis, T., Arasteh, K., Torian, L. V., Beatrice, S., Milliken, J., et al. (2005). HIV incidence among injection drug users in New York City, 1990 to 2002: use of serologic test algorithm to assess expansion of HIV prevention services. Am J Public Health, 95(8), 1439-1444.

  • Topp, L., Day, C. A., Iversen, J., Wand, H., & Maher, L. (2011). Fifteen years of HIV surveillance among people who inject drugs: the Australian Needle and Syringe Program Survey 1995-2009. AIDS, 25(6), 835-842.

  • Bruneau, J., Daniel, M., Abrahamowicz, M., Zang, G., Lamothe, F., & Vincelette, J. (2011). Trends in human immunodeficiency virus incidence and risk behavior among injection drug users in montreal, Canada: a 16-year longitudinal study. Am J Epidemiol, 173(9), 1049-1058.


  • Login