Skills for HIV risk reduction: evaluation of recall and performance in injecting drug users

Detection of HIV-1 in injection paraphernalia: risk in an era of heightened awareness

Links between AIDS and self-injection of drugs were first recognized more than 20 years ago, but identification of a specific pathogen and ways to neutralize it has not led to complete success in preventing transmission of HIV-1 infection among injecting drug users (IDUs). A street ethnographer identified active risk locales (places where IDUs go to inject drugs) and recruited their proprietors into a study of contaminated injection paraphernalia. Collected paraphernalia from locales were analyzed for contamination by HIV-1 using real-time polymerase chain reaction (PCR). Proprietors and clientele of 16 risk locales participated by contributing used paraphernalia and/or agreeing to a blood test (0.5-1 mL drawn by finger stick). Realtime PCR was the primary measure used to determine contamination of injection paraphernalia and blood samples with HIV-1. Of 130 samples collected at baseline, a total of 8 were found to have evidence of HIV-1 contamination by detection of either HIV-1 RNA or DNA. The most serious contamination (up to 600,000 copies per milliliter) was found in ancillary paraphernalia, rather than needle/syringe (N/S) specimens. Only 4 of 74 N/S specimens had any evidence of HIV-1 contamination at all (with very low viral loads), and none had both HIV-1 DNA and RNA. Although IDUs in risk locales in Miami/Dade appear to be taking care of their N/S with regard to contamination by HIV-1, important evidence of contamination in ancillary paraphernalia, especially cookers and cottons, indicates that IDUs may still incur serious risk regardless of how well they care for their N/S. Our observations indicated that IDUs rinsed their N/S before returning them to the proprietors, from whom we eventually collected them, and this rinsing would have masked the contamination to which they were exposed through use of unrinsed cookers and reused cottons.

Changes in the "get-off": social process and intervention in risk locales

Because of ongoing resistance in Florida's legislature to interventions involving exchanges of sterile syringes for contaminated ones, Miami/Dade County's population of injection drug users (IDUs) reduce risk of HIV and hepatitis C infection by buying illegal syringes, participating in illegal syringe exchanges, or decontaminating their paraphernalia. Although it is completely legal, wherewithal for decontamination of injection paraphernalia, including sodium hypochlorite (laundry bleach), water, and cotton for filtering drugs, only appears sporadically in Miami/Dade's risk locales (called "get-off" houses). To ensure consistent decontamination, our intervention instituted regular delivery of these goods to known risk locales. In addition, personnel in half of the locales received training in techniques for optimal decontamination. RNA polymerase chain reaction measured impact of this intervention in terms of viral load found on harvested paraphernalia. Regular delivery of cleansing paraphernalia provided opportunities for observation and characterization of adaptations among people who run risk locales. These people may lead highly stable lives or highly changeable ones, but in most cases their roles as regular hosts of injection activities continue with only brief hiatuses due to incarceration, eviction, or familial dissolution. Proprietors of risk locales maintain their roles as facilitators of self-injection because they use that role to make money or to obtain opportunities to inject drugs and also because their clientele demands they continue.

An HIV prevalence-based model for estimating urban risk populations of injection drug users and men who have sex with men

Issues of cost and complexity have limited the study of the population sizes of men who have sex with men (MSM) and injection drug users (IDUs), two groups at clearly increased risk for human immunodeficiency virus (HIV) and other acute and chronic diseases. We developed a prototypical, easily applied estimation model for these populations and applied it to Miami, Florida. This model combined HIV prevalence estimates, HIV seroprevalence rates, and census data to make plausible estimates of the number and proportion of MSM and IDUs under a number of assumptions. Sensitivity analyses were conducted to test the robustness of the model. The model suggests that approximately 9.5% (plausible range 7.7%-11.3%) of Miami males aged 18 years or older are MSM (point estimate, N = 76,500), and 1.4% (plausible range 0.9%-1.9%) of the total population aged 18 years or older are IDUs (point estimate, N = 23,700). Males may be about 2.5 times more likely than females to be IDUs. The estimates were reasonably robust to biases. The model was used to develop MSM and IDU population estimates in selected urban areas across Florida and should be replicable in other medium-to-large urban areas. Such estimates could be useful for behavioral surveillance and resource allocation, including enhanced targeting of community-based interventions for primary and secondary HIV prevention.

HIV/AIDS among probationers: an assessment of risk and results from a brief intervention

A number of studies have examined HIV risk behaviors in prisoner populations, but relatively few have examined such behaviors in probationer populations. Since probationers have more opportunities to engage in risk behaviors than do prisoners, the potential importance of HIV interventions with probationers becomes readily apparent. This article examines a sample representative of the supervised probationer population in Delaware. The sample respondents received a baseline interview, then were randomly selected to receive either an enhanced version of NIDA standard HIV Intervention or a Focused Intervention based on a cognitive thought-mapping model. Intervention boosters were offered at two follow-up intervals in the following three months, and respondents were reinterviewed at six months. The data at baseline suggest that probationers in Delaware have levels of injection drug use, other serious drug use, and rates of risky sexual behaviors that approach those observed in prison populations. The interventions' effectiveness in changing attitudes and behaviors at the six-month interview was then examined. The data support the conclusion that brief interventions can significantly impact both drug use and sexual risk behaviors among probationers. However, there do not appear to be significant improvements for those receiving the more intensive Focused Intervention, as compared to those who receive the enhanced Standard Intervention. Further work will consider what components in programs and characteristics in clients should be considered in selecting the most appropriate interventions for probationers.