HIV and risk environment for injecting drug users: the past, present, and future

Feasibility and acceptability of multiple methods of recording injecting drug use episode data among people who inject drugs in Melbourne, Australia: a pilot evaluation study protocol

INTRODUCTION

Opioid overdose and blood-borne virus transmission are key health risks for people who inject drugs. Existing study methods that record data on injecting drug risks mostly rely on retrospective self-reporting that, while valid, are limited to being broad and subject to recall bias. The In-The-Moment-Expanded (ITM-Ex) study will evaluate the feasibility and acceptability of multiple novel data collection methods to capture in situ drug injecting data.

METHODS AND ANALYSIS

ITM-Ex will purposively recruit 50 participants from an existing longitudinal cohort (SuperMIX study) of people who inject drugs in Melbourne, Australia. Over a 4-week study period, participants will be asked to complete baseline/endline spirometry, continuously wear a heart rate monitoring device, complete short-form ecological momentary assessment (EMA) questionnaires for every injecting episode during the study period and return previously used needles/syringes for drug residue testing. These multiple data sources will be combined to conduct a comprehensive analysis of the physiological and risk characteristics of an estimated 800 individual injecting drug use episodes (if participants inject four times weekly). Finally, post-participation qualitative interviews will explore the acceptability of the data collection methods.

ETHICS AND DISSEMINATION

Ethics approval for ITM-Ex was obtained from Alfred Hospital Ethics Committee (project number 368/22). Results will be disseminated via national and international scientific and public health conferences and peer-reviewed journal publications.Results from ITM-Ex may demonstrate vastly more complete and accurate methods of capturing data on injecting drug use risk and support future development and evaluation of devices to monitor and intervene during drug overdose. Further, ITM-Ex may demonstrate innovative methodologies to support myriad future public health research studies.

Using HIV and Hepatitis C Molecular Epidemiology to Investigate Assisted Partner Services Recruitment Among People Who Inject Drugs in Kenya

Sexual and/or injecting partners of people who inject drugs (PWID) may have an elevated risk of HIV infection either from sharing a transmission network or an epidemiological environment. We estimated the degree of similarity between HIV and hepatitis C (HCV) sequences from PWID and their partners to assess whether partner-based recruitment identifies sexual or injecting partners within transmission networks. We used assisted partner services (APS) to recruit sexual and injecting partners of PWID living with HIV in Kenya and evaluated trends in the TN93 distances (an adjusted measure of sequence similarity) of the HIV-1 and HCV sequences from partner pairs. Of 135 unique pairs identified, 2 sexual, 2 injecting, and 3 unique sexual and injecting partner pairs had HIV sequences within a TN93 distance of 0.045, and 4 unique partner pairs had HCV sequences with distances <0.015. Sexual but not injecting partner pairs had HIV sequences with significantly smaller distances than non-partners, on average, but injecting partner pairs did have significantly smaller HCV-4a patristic distances than non-partners. APS recruitment partly reflects the HIV transmission network among sexual, but not injecting, partners of PWID. The relationship between the injecting partner recruitment and molecular networks is stronger for HCV than HIV and may reflect some recent parenteral HCV transmission. Our results show the importance of continued focus on reducing sexual HIV transmission among PWID and on education and services to address HCV transmission through needle- and/or equipment-sharing.

A phylogenetic assessment of HIV-1 transmission trends among people who inject drugs from Coastal and Nairobi, Kenya

Although recent modeling suggests that needle-syringe programs (NSPs) have reduced parenteral HIV transmission among people who inject drugs (PWID) in Kenya, the prevalence in this population remains high (∼14-20%, compared to ∼4% in the larger population). Reducing transmission or acquisition requires understanding historic and modern transmission trends, but the relationship between the PWID HIV-1 sub-epidemic and the general epidemic in Kenya is not well understood. We incorporated 303 new (2018-21) HIV-1 pol sequences from PWID and their sexual and injecting partners with 2666 previously published Kenyan HIV-1 sequences to quantify relative rates and direction of HIV-1 transmissions involving PWID from the coast and Nairobi regions of Kenya. We used genetic similarity cluster analysis (thresholds: patristic distance <0.045 and <0.015) and maximum likelihood and Bayesian ancestral state reconstruction to estimate transmission histories at the population group (female sex workers, men who have sex with men, PWID, or general population) and regional (coast or Nairobi) levels. Of 1081 participants living with HIV-1, 274 (25%) were not virally suppressed and 303 (28%) had sequences available. Of new sequences from PWID, 58% were in phylogenetic clusters at distance threshold <0.045. Only 21% of clusters containing sequences from PWID included a second PWID sequence. Sequences from PWID were similarly likely to cluster with sequences from female sex workers, men who have sex with men, and the general population. Ancestral state reconstruction suggested that transmission to PWID from other populations was more common than from PWID to other populations. This study expands our understanding of the HIV-1 sub-epidemic among PWID in Kenya by incorporating four times more HIV-1 sequences from this population than prior studies. Despite recruiting many PWID from local sexual and injecting networks, we found low levels of linked transmission in this population. This may suggest lower relative levels of parenteral transmission in recent years and supports maintaining NSPs among PWID, while also strengthening interventions to reduce HIV-1 sexual acquisition and transmission for this population.

Rapid Assessment Amid an Injection Drug Use-Driven HIV Outbreak in Massachusetts' Merrimack Valley: Highlights from a Case Study

Illicitly manufactured fentanyl within the drug supply has substantially increased opioid-related overdose deaths and driven infectious disease outbreaks among people who use drugs (PWUD). Local jurisdictions often lack the data and tools necessary to detect and translate such moments into actionable and effective responses. Informed by a risk environment framework, this case study adopted a mixed-methods design spanning two rapid assessment studies with PWUD in Lowell (n = 90) and Lawrence (n = 40), Massachusetts, during an HIV outbreak (2017, Study 1) and following the outbreak (2019, Study 2). Survey responses (n = 130) were summarized by computing descriptive statistics, ethnographic field notes were reviewed, and qualitative interviews (n = 34) were thematically analyzed to contextualize quantitative findings. Study 1 participants reported constrained syringe access, high injecting frequency, syringe reuse, and unsafe syringe disposal practices, and uncovered entrenched social and structural factors exacerbating existing substance use and HIV risks: housing instability, limited harm reduction supplies and services (e.g., MOUD access), and tensions between law enforcement and PWUD. Following the outbreak and substantial local investments in harm reduction and treatment infrastructures, Study 2 participants indicated lower injection risk reporting fewer syringe reuse episodes, improved syringe disposal practices, high frequency of naloxone administration at recent overdoses, frequent testing for HIV and HCV, and greater engagement with syringe services programs. A rapid assessment approach to fentanyl's emergence and a concomitant HIV outbreak provided time-sensitive, critical insights and identified needed and local response strategies. However, unless social and structural risk factors are also addressed, community vulnerability to future HIV outbreaks remains.

Psychomodulatory substances: New legislative framework for control of psychoactive substances in Czechia

This article challenges drug prohibition advocated by UN conventions as the prevailing regulatory model for psychoactive substances, highlighting its ineffectiveness, harmfulness and outdated nature. At the same time, the conventions exclude some psychoactive substances from international regulation, leaving control to individual countries. Presenting an innovative approach, this article outlines an approach to the legal regulation of psychomodulatory substances (psychoactive substances with low health and societal risk) in non-medical contexts. Acknowledging the potential benefits of such psychoactive substances and balancing them with potential harms, it suggests stringent rules for marketing, safety, and preventing sales to minors. This approach aims to quell illicit markets, safeguard vulnerable populations, and encourage controlled use. Through a case study of the Czech Republic's introduction of a new category of psychomodulatory substances, this article showcases a paradigm shift from the prevailing repressive approach to drug regulation. This adaptive model effectively navigates the regulatory void, offering a viable alternative to the UN's prohibition framework.

Dual HIV risk and vulnerabilities among people who inject drugs in Iran: Findings from a nationwide study in 2020

INTRODUCTION

People who inject drugs (PWID) are a key population at risk of HIV in Iran. We measured the prevalence and covariates of HIV-related risk behaviours among PWID in Iran.

METHODS

We conducted a respondent-driven bio-behavioural surveillance survey among PWID from July 2019 to March 2020 in 11 major cities. We assessed PWID's recent (i.e., last three months) HIV-related risk behaviours using a four-level categorical variable: Only unsafe injection (i.e., sharing needles/syringes or injecting equipment), only unsafe sex (i.e., unprotected sex), dual HIV risk (i.e., both unsafe injection and unprotected sex), and safe injection and sex. Data were summarized using RDS-weighted analysis. Multinomial logistic regression models were built to characterize HIV-related risk behaviours and relative risk ratio (RRR) with 95% confidence interval (CI) were reported.

RESULTS

Overall, 2562 men who inject drugs (MWID) were included in the regression analysis. The RDS-weighted prevalence of dual HIV risk was 1.3% (95% CI: 0.8, 1.9), only unsafe injection was 4.5%, and only unsafe sex was 11.8%. Compared to the safe injection and sex group, dual HIV risk was significantly and positively associated with multiple partnership (RRR = 15.06; 3.30, 68.73). Only unsafe injection was significantly associated with homelessness in the last 12 months (RRR: 3.02; 95% CI: 1.34, 6.80). Only unsafe sex was significantly associated with multiple partnership (RRR = 6.66; 4.27, 10.38), receiving free condoms (RRR = 1.71; 1.01, 2.89), receiving free needles (RRR = 2.18; 1.22, 3.90), and self-received risk for HIV (RRR = 2.51; 1.36, 4.66). Moreover, history of HIV-testing in the last three months was significantly associated with only unsafe injection (RRR = 2.71; 1.84, 3.80). Among the 90 women who injected drugs, none reported dual HIV risk behaviours.

DISCUSSION AND CONCLUSIONS

While the low prevalence of dual HIV risk among PWID is encouraging, unprotected sexual practices among PWID is concerning. Expanding sexual health education and care services as well as tailored interventions aimed at reducing high-risk sexual activities among PWID are warranted. Additionally, tackling potential misperceptions about risk of HIV transmission among PWID in Iran is warranted.

From conceptualising to modelling structural determinants and interventions in HIV transmission dynamics models: a scoping review and methodological framework for evidence-based analyses

BACKGROUND

Including structural determinants (e.g. criminalisation, stigma, inequitable gender norms) in dynamic HIV transmission models is important to help quantify their population-level impacts and guide implementation of effective interventions that reduce the burden of HIV and inequalities thereof. However, evidence-based modelling of structural determinants is challenging partly due to a limited understanding of their causal pathways and few empirical estimates of their effects on HIV acquisition and transmission.

METHODS

We conducted a scoping review of dynamic HIV transmission modelling studies that evaluated the impacts of structural determinants, published up to August 28, 2023, using Ovid Embase and Medline online databases. We appraised studies on how models represented exposure to structural determinants and causal pathways. Building on this, we developed a new methodological framework and recommendations to support the incorporation of structural determinants in transmission dynamics models and their analyses. We discuss the data and analyses that could strengthen the evidence used to inform these models.

RESULTS

We identified 17 HIV modelling studies that represented structural determinants and/or interventions, including incarceration of people who inject drugs (number of studies [n] = 5), violence against women (n = 3), HIV stigma (n = 1), and housing instability (n = 1), among others (n = 7). Most studies (n = 10) modelled exposures dynamically. Almost half (8/17 studies) represented multiple exposure histories (e.g. current, recent, non-recent exposure). Structural determinants were often assumed to influence HIV indirectly by influencing mediators such as contact patterns, condom use, and antiretroviral therapy use. However, causal pathways' assumptions were sometimes simple, with few mediators explicitly represented in the model, and largely based on cross-sectional associations. Although most studies calibrated models using HIV epidemiological data, less than half (7/17) also fitted or cross-validated to data on the prevalence, frequency, or effects of exposure to structural determinants.

CONCLUSIONS

Mathematical models can play a crucial role in elucidating the population-level impacts of structural determinants and interventions on HIV. We recommend the next generation of models reflect exposure to structural determinants dynamically and mechanistically, and reproduce the key causal pathways, based on longitudinal evidence of links between structural determinants, mediators, and HIV. This would improve the validity and usefulness of predictions of the impacts of structural determinants and interventions.

Characterizing people who inject drugs with no history of opioid agonist therapy uptake in Iran: Results from a national bio-behavioural surveillance survey in 2020

Injection drug use is the primary driver of the human immunodeficiency virus HIV epidemic in Iran. We characterized people who inject drugs (PWID) living in Iran who had never received opioid agonist therapy (OAT) and examined barriers to OAT uptake. We recruited 2,684 PWID with a history of drug injection in the previous 12 months using a respondent-driven sampling approach from 11 geographically dispersed cities in Iran. The primary outcome was no lifetime uptake history of OAT medications. The lifetime prevalence of no history of OAT uptake among PWID was 31.3%, with significant heterogeneities across different cities. In the multivariable analysis, younger age, high school education or above, no prior incarceration history, and shorter length of injecting career was significantly and positively associated with no history of OAT uptake. Individual-level barriers, financial barriers, and system-level barriers were the main barriers to receiving OAT. PWID continue to face preventable barriers to accessing OAT, which calls for revisiting the OAT provision in Iran.

Access to and acceptability of sexual and reproductive health, harm reduction and other essential health services among people who inject drugs in Durban, South Africa

BACKGROUND

People who inject drugs (PWID) are at risk of HIV acquisition. The number of PWID in South African cities is increasing, and in spite of an advanced HIV prevention and treatment programme, there are PWID who experience challenges accessing sexual and reproductive health (SRH) and HIV related services. Access to and acceptability of SRH and harm reduction services by PWID needs to be further understood and explored.

METHODS

In-depth interviews (IDIs) were conducted with 10 key stakeholders and 11 PWID, in Durban, South Africa. Interviews were transcribed and translated. Data were thematically analysed using Dedoose software.

RESULTS

Participants described stigma/discrimination from healthcare workers and other clients accessing services as barriers to accessing healthcare services. They were concerned about long waiting times at healthcare facilities because of possibilities of withdrawal, as well as lost opportunities to "hustle". Targeted, non-discriminatory services, as well as mobile clinics existed in the city. Non-governmental organisations reportedly worked together with the public sector, facilitating access to HIV and TB prevention and treatment services. There were also needle exchange programmes and a harm reduction clinic in the city. However, there was limited access to contraceptive and STI services. Although there was reportedly good access to HIV and TB and harm reduction services in the city of Durban, uptake was low.

CONCLUSIONS

The integration of services to enable PWID to access different services under one roof is critical. There is also a need to strengthen linkages between public and private healthcare, and ensure services are provided in a non-discriminatory environment. This will facilitate uptake and access to more comprehensive SRH and harm reduction services for PWID in Durban, South Africa.

PrEP facilitators and barriers in substance use bridge clinics for women who engage in sex work and who use drugs

BACKGROUND

Women who engage in sex work and use drugs (WSWUD) experience disproportionate HIV risks. Substance use treatment bridge clinics offer an opportunity to increase HIV pre-exposure prophylaxis (PrEP) delivery to WSWUD, but research on best practices is lacking. Therefore, we explored facilitators and barriers to PrEP across the PrEP care continuum in these settings.

METHODS

Bridge clinic and affiliated harm reduction health service providers and WSWUD from Boston were recruited using passive and active outreach between December 2021 and August 2022. Participants were invited to take part in semi-structured phone or in-person interviews to explore HIV prevention and PrEP care experiences overall and within bridge clinic settings. Deductive codes were developed based on HIV risk environment frameworks and the Information-Motivation-Behavioral Skills model and inductive codes were added based on transcript review. Grounded content analysis was used to generate themes organized around the PrEP care continuum.

RESULTS

The sample included 14 providers and 25 WSWUD. Most WSWUD were aware of PrEP and more than half had initiated PrEP at some point. However, most who initiated PrEP did not report success with daily oral adherence. Providers and WSWUD described facilitators and barriers to PrEP across the steps of the care continuum: Awareness, uptake, adherence, and retention. Facilitators for WSWUD included non-stigmatizing communication with providers, rapid wraparound substance use treatment and HIV services, having a PrEP routine, and service structures to support PrEP adherence. Barriers included low HIV risk perceptions and competing drug use and survival priorities. Provider facilitators included clinical note templates prompting HIV risk assessments and training. Barriers included discomfort discussing sex work risks, competing clinical priorities, and a lack of PrEP adherence infrastructure.

CONCLUSION

WSWUD and bridge clinic providers favored integrated HIV prevention and substance use services in harm reduction and bridge clinic settings. Harm reduction and bridge clinic programs played a key role in HIV prevention and PrEP education for WSWUD. Effective behavioral and structural interventions are still needed to improve PrEP adherence for WSWUD.

Injection network drivers of HIV prevention service utilization among people who inject drugs: results of a community-based sociometric network cohort in New Delhi, India

INTRODUCTION

Injection drug networks may influence their network members' health-seeking behaviours. Using data from a sociometric injecting partner network of people who inject drugs (PWID) in New Delhi, India, we assessed the role of injecting partner (alter) behaviours on individual engagement in HIV prevention services.

METHODS

We enumerated injecting partner linkages among 2512 PWID using coupon referrals and biometric data from November 2017 to March 2020. Participants completed interviewer-administered questionnaires and provided information on injection behaviours, injecting partners, HIV/hepatitis C (HCV) testing and service engagement. Multilevel multiple-membership models (MMMM) evaluated individual PWID HIV testing, medication for opioid use disorder (MOUD) and syringe service engagement as a function of alter attributes, accounting for membership across multiple ego-networks. Logistic regression models assessed parallel associations among socially proximal injecting peers, defined as PWID ≤3 path length from ego.

RESULTS

Median age was 26 years; 99% were male. PWID had median 2 injecting partners and 8 socially proximal peers; 14% reported HIV testing, 33% accessed MOUD and 13% used syringe services 6 months prior. In MMMM analyses, PWID with ≥1 versus 0 injecting partners who received HIV testing were significantly more likely to report HIV testing (adjusted odds ratio [aOR]: 2.27, 95% confidence interval [CI]: 1.68-3.16), MOUD (aOR: 1.99, 95% CI: 1.60-2.53) and syringe service use (aOR: 1.66, 95% CI: 1.21-2.39). We observed similar findings for individual MOUD and syringe service use. Having ≥1 versus 0 HIV-positive partners was associated with decreased HIV testing and MOUD but increased syringe service use (aOR: 1.54, 95% CI: 1.09-2.17). PWID with ≥1 versus 0 socially proximal peers who used non-sterile injection equipment reported increased HIV testing (aOR: 1.39, 95% CI: 1.01-1.92), MOUD (aOR: 1.40, 95% CI: 1.10-1.77) and syringe service use (aOR: 1.82, 95% CI: 1.23-2.68).

CONCLUSIONS

We found differential associative relationships between individual HIV prevention service engagement and the health or risk behaviours of direct and indirect alters. Characterizing network exposure beyond direct injecting partnerships provided important context on possible mechanisms of behavioural influence. Findings could be leveraged to design peer-based interventions that promote network diffusion of health-seeking behaviours.

A Census Tract-Level Examination of Diagnosed HIV Infection and Social Vulnerability Themes Among Black/African American, Hispanic/Latino, and White Adults, 2019-USA

BACKGROUND

Assessing HIV diagnosis and the social vulnerability index (SVI) by themes (socioeconomic status, household composition and disability, minority status and English proficiency, and housing type and transportation) might help to identify specific social factors contributing to disparities across census tracts with high rates of diagnosed HIV infection in the USA.

METHODS

We examined HIV rate ratios in 2019 using data from CDC's National HIV Surveillance System (NHSS) for Black/African American, Hispanic/Latino, and White persons aged ≥ 18 years. NHSS data were linked to CDC/ATSDR SVI data to compare census tracts with the lowest SVI (Q1) and highest SVI (Q4) scores. Rates and rate ratios were calculated for 4 SVI themes by sex assigned at birth for age group, transmission category, and region of residence.

RESULTS

In the socioeconomic theme analysis, we observed wide within-group disparity among White females with diagnosed HIV infection. In the household composition and disability theme, we observed high HIV diagnosis rates among Hispanic/Latino and White males who lived in the least socially vulnerable census tracts. In the minority status and English proficiency theme, we observed a high percentage of Hispanic/Latino adults with diagnosed HIV infection in the most socially vulnerable census tracts. In the housing type and transportation theme, we observed a high percentage of HIV diagnoses attributed to injection drug use in the most socially vulnerable census tracts.

CONCLUSION

The development and prioritization of interventions that address specific social factors contributing to disparities in HIV across census tracts with high diagnosis rates are critical to reducing new HIV infections in the USA.

A Qualitative Analysis of Barriers to Accessing HIV Prevention Services During an HIV Outbreak among Persons who Inject Drugs in West Virginia

In response to an increase in HIV diagnoses among persons who inject drugs (PWID) in Kanawha County, West Virginia, West Virginia Bureau for Public Health and CDC conducted a qualitative assessment in Kanawha County to inform HIV outbreak response activities. Interviews with 26 PWID and 45 community partners were completed. Transcribed interviews were analyzed to identify barriers to accessing HIV prevention services among PWID using the risk environment framework. Participants identified numerous political, physical, social, and economic community-level barriers that influenced access to HIV prevention services among PWID. Political factors included low community support for syringe services programs (SSPs); physical factors included low SSP coverage, low coverage of HIV testing outreach events, low HIV preexposure prophylaxis availability, and homelessness; social factors included stigma and discrimination; economic factors included community beliefs that SSPs negatively affect economic investments and limited resources for HIV screening in clinical settings. Individual-level barriers included co-occurring acute medical conditions and mental illness. Community-level interventions, such as low-barrier one-stop shop models, are needed to increase access to sterile syringes through comprehensive harm reduction services.

Facilitators and Barriers to PrEP Acceptability and Initiation Among Opioid Treatment Program Patients and Staff

The Centers for Disease Control and Prevention recommends PrEP (pre-exposure prophylaxis) for people who use drugs, yet uptake remains low. This study explores the acceptability and potential uptake of PrEP among participants in an opioid treatment program (OTP). We conducted 26 in-depth, semistructured interviews with staff and patients at an OTP in Baltimore, Maryland. Overall, participants felt that providing PrEP within the program would be beneficial, but they noted competing priorities among populations engaging in high-risk behaviors and lack of willingness among groups with lower risk behaviors. Participants reported several barriers to PrEP use among people who use drugs and who use medications for opioid use, including cost, competing priorities, stigma, and misconceptions about who should use PrEP. Facilitators to PrEP use were described as health benefits, trusted relationships with providers, and existing resources in the opioid treatment program. Practitioners should consider addressing barriers to access and stigma within an OTP setting for HIV prevention tools.

A qualitative assessment of tablet injectable opioid agonist therapy (TiOAT) in rural and smaller urban British Columbia, Canada: Motivations and initial impacts

BACKGROUND

The evolving and unpredictable unregulated drug market has driven an unprecedented overdose crisis that requires effective intervention. Growing evidence suggests that novel opioid agonist treatments, such as tablet injectable opioid agonist therapy (TiOAT), have potential to prevent overdoses and other drug-related harms. More evidence is needed to characterize their utility in achieving these outcomes. The current article is an analysis of two TiOAT programs implemented in British Columbia, Canada, to assess impact on health and well-being, including overdose risk. Moreover, we explored participants' enrollment goals and if they were achieved.

METHODS

The study employed qualitative methods to evaluate the TiOAT program in two sites between October 2021 and April 2022. We developed a semi-structured interview tool to guide in depth interviews. All interviews (n = 32) took place on teleconference software or in person. Thematic analysis allowed for the emergence of themes associated with TiOAT participation.

RESULTS

Participants discussed various motivations for enrolling in TiOAT, which included gaining financial stability, reducing or eliminating drug use, addressing withdrawal symptoms, wanting to work, and improving social circumstances. An assessment of initial programmatic impacts revealed that many participant-identified motivators were achieved. Participants also reported fewer or no overdoses since starting TiOAT, and many reported switching from injecting to smoking drugs. Some challenges included adequate dosing as evidenced by ongoing withdrawal and pain. Some participants requested additional opioids, such as diacetylmorphine, to aid in reducing illicit drug use.

CONCLUSION

Participants described how TiOAT helped them to achieve many of their goals. Suggested programmatic improvements include enhanced patient-provider co-design with respect to dosing to address ongoing withdrawal and pain. As the unpredictability the unregulated drug market worsens, novel options, such as TiOAT, ought to be implemented broadly to reduce overdose events and improve quality of life for people who use drugs.

Characterizing Opioid Withdrawal Experiences and Consequences Among a Community Sample of People Who Use Opioids

BACKGROUND

Opioid withdrawal symptoms are a highly salient and consequential health condition experienced by people who use opioids (PWUO). This study utilized qualitative interviews to explore opioid withdrawal experiences and consequences among PWUO in Los Angeles County, USA.

METHODS

Semi-structured qualitative interviews were conducted with 22 PWUO (aged 27-63 years) between May 2021 and May 2022. Participants self-reported opioid and injection drug use in the last 30 days. We employed an inductive thematic approach to systematically code and synthesize textual interview data.

RESULTS

Participants experienced withdrawal symptoms frequently, with many going to great lengths to avoid them. Withdrawal pain was described as incapacitating and interfered with PWUO's ability to sustain regular employment and ensure stable housing. Avoiding withdrawal was described as influential in driving decisions to continue using opioids. Mechanisms for managing withdrawal included using other substances to the point of sedation. PWUO who transitioned from heroin to fentanyl use revealed more frequent, painful, and faster onset of withdrawal symptoms. Adverse withdrawal experiences and fear of precipitated withdrawal from buprenorphine were barriers to treatment initiation and continuation.

CONCLUSION

Withdrawal symptoms among PWUO increase health risk. Improved strategies to treat opioid withdrawal are urgently needed. Solutions such as safe supply and intentional opioid withdrawal interventions (educational trainings, withdrawal comfort kits) are needed to improve withdrawal management and reduce opioid-related harm.

Social networks, secondary syringe exchange, and opioid agonist therapy retention among people who inject drugs in Hartford, CT

BACKGROUND

Opioid agonist therapies (OAT) and  harm reduction such as syringe service programs (SSP) have been shown to be effective in preventing adverse outcomes such as overdose deaths, HIV and Hepatitis C infections among people who inject drugs (PWID). The importance of social network influence on disease transmission is well established, yet the interplay between harm reduction and network structures is, generally, not well understood. This study aims to analyze how social networks can mediate the harm reduction effects associated with secondary exchange through syringe service programs (SSP) and opioid agonist therapies (OAT) among injection network members.

METHODS

Sociometric data on networks on people who inject drugs from Hartford, CT, which were collected in 2012-2013, provided assessment of risk behaviors among 1574 injection network members, including participation in OAT and SSP. Subject's network characteristics were examined in relation to retention in OAT, as well as secondary syringe exchange using exponential random graph model (ERGM) and regression.

RESULTS

Based on the analysis, we found that probability of individuals being retained in OAT was positively associated with the OAT retention status of their peers within the network. Using simulations, we found that higher levels of positive correlation of OAT retention among network members can result in reduced risk of transmission of HIV to network partners on OAT. In addition, we found that secondary syringe exchange engagement was associated with higher probability of sharing of paraphernalia and unsterile needles at the network level.

CONCLUSIONS

Understanding how networks mediate risk behaviors is crucial for making progress toward ending the HIV epidemic.

Measuring HIV Acquisitions Among Partners of Key Populations: Estimates From HIV Transmission Dynamic Models

BACKGROUND

Key populations (KPs), including female sex workers (FSWs), gay men and other men who have sex with men (MSM), people who inject drugs (PWID), and transgender women (TGW) experience disproportionate risks of HIV acquisition. The UNAIDS Global AIDS 2022 Update reported that one-quarter of all new HIV infections occurred among their non-KP sexual partners. However, this fraction relied on heuristics regarding the ratio of new infections that KPs transmitted to their non-KP partners to the new infections acquired among KPs (herein referred to as "infection ratios"). We recalculated these ratios using dynamic transmission models.

SETTING

One hundred seventy-eight settings (106 countries).

METHODS

Infection ratios for FSW, MSM, PWID, TGW, and clients of FSW were estimated from 12 models for 2020.

RESULTS

Median model estimates of infection ratios were 0.7 (interquartile range: 0.5-1.0; n = 172 estimates) and 1.2 (0.8-1.8; n = 127) for acquisitions from FSW clients and transmissions from FSW to all their non-KP partners, respectively, which were comparable with the previous UNAIDS assumptions (0.2-1.5 across regions). Model estimates for female partners of MSM were 0.5 (0.2-0.8; n = 20) and 0.3 (0.2-0.4; n = 10) for partners of PWID across settings in Eastern and Southern Africa, lower than the corresponding UNAIDS assumptions (0.9 and 0.8, respectively). The few available model estimates for TGW were higher [5.1 (1.2-7.0; n = 8)] than the UNAIDS assumptions (0.1-0.3). Model estimates for non-FSW partners of FSW clients in Western and Central Africa were high (1.7; 1.0-2.3; n = 29).

CONCLUSIONS

Ratios of new infections among non-KP partners relative to KP were high, confirming the importance of better addressing prevention and treatment needs among KP as central to reducing overall HIV incidence.

Financial Vulnerability and Its Association with HIV Transmission Risk Behaviors Among People Who Inject Drugs in Kyrgyzstan

The Family Resource Scale (FRS) is a three-factor financial vulnerability (FV) measure. FV may impact HIV transmission risks. Cross-sectional data from 279 people who inject drugs (PWID) in Kyrgyzstan surveyed April-October 2021 was used to validate the FRS and estimate associations between FV on past 6-month injection and sexual HIV risk outcomes. The three-factor FRS reflected housing, essential needs, and fiscal independence, and had good internal reliability and structural validity. Greater cumulative, housing, and essential needs FRS scores were associated with increased relative risk on public injection (adjusted risk ratio [aRR], 95% confidence interval [95% CI]: 1.03 [1.01, 1.04]; aRR [95% CI]: 1.06 [1.02, 1.09]; aRR [95% CI]: 1.06 [1.03, 1.08], respectively, all p < 0.001) and preparing injections with unsafe water sources (aRR [95% CI]: 1.04 [1.02, 1.07]; aRR [95% CI]: 1.09 [1.04, 1.15]; aRR [95% CI]: 1.08 [1.03, 1.14], respectively, all p < 0.001). Results suggest that PWID housing- and essential needs-related FV may exacerbate injection HIV transmission risks. Reducing PWIDs' FV may enhance the HIV response in Kyrgyzstan.

Co-occurrence of injection drug use and hepatitis C increases epigenetic age acceleration that contributes to all-cause mortality among people living with HIV

Co-occurrence of injection drug use (IDU) and hepatitis C virus infection (HCV) is common in people living with HIV (PLWH) and leads to significantly increased mortality. Epigenetic clocks derived from DNA methylation (DNAm) are associated with disease progression and all-cause mortality. In this study, we hypothesized that epigenetic age mediates the relationships between the co-occurrence of IDU and HCV with mortality risk among PLWH. We tested this hypothesis in the Veterans Aging Cohort Study (n = 927) by using four established epigenetic clocks of DNAm age (i.e., Horvath, Hannum, Pheno, Grim). Compared to individuals without IDU and HCV (IDU-HCV-), participants with IDU and HCV (IDU+HCV+) showed a 2.23-fold greater risk of mortality estimated using a Cox proportional hazards model (hazard ratio: 2.23; 95% confidence interval: 1.62-3.09; p = 1.09E-06). IDU+HCV+ was associated with a significantly increased epigenetic age acceleration (EAA) measured by 3 out of 4 epigenetic clocks, adjusting for demographic and clinical variables (Hannum: p = 8.90E-04, Pheno: p = 2.34E-03, Grim: p = 3.33E-11). Furthermore, we found that epigenetic age partially mediated the relationship between IDU+HCV+ and all-cause mortality, up to a 13.67% mediation proportion. Our results suggest that comorbid IDU with HCV increases EAA in PLWH that partially mediates the increased mortality risk.

Using ADAPT-ITT framework to tailor evidence-based interventions for addressing methamphetamine use among methadone patients in Vietnam

INTRODUCTION

Methamphetamine use threatens positive treatment outcomes in substance use and HIV, for people with opioid use disorders (POUD) in many countries. This paper describes the adaptation of four evidence-based interventions (EBI) (motivational interviewing, contingency management, Matrix group model and SMS text messaging) for treating methamphetamine use among POUD receiving methadone maintenance therapy in Vietnam.

METHODS

Following the ADAPT-ITT (Assessment-Decision-Administration-Production-Topical experts-Training-Testing) framework, we conducted 16 focus group discussions with POUD (n = 25) and providers (n = 22) at four methadone clinics in two largest cities (Hanoi in the North, Ho Chi Minh City in the South) to assess patterns of methamphetamine use and to get feedback on proposed EBIs. The proposed EBIs were properly adapted and used to train providers in two of the four methadone clinics. The revised EBIs were tested over 12 weeks among 42 POUD on methadone who use methamphetamine. Post-intervention feedback served to fine-tune the revised EBIs.

RESULTS

Insights about patterns of methamphetamine use suggested that EBIs should focus on different triggers to methamphetamine use among POUD receiving methadone treatment in the two cities. All EBIs should emphasise family-related topics to build a strong motivation for treatment. Participants suggested when, where and how each EBI should be delivered. Most participants were satisfied with the adapted EBIs. Limited human resources at methadone clinics might hinder implementation of the adapted EBIs.

DISCUSSION AND CONCLUSIONS

We successfully completed the adaptation of EBIs for POUD who use methamphetamine on methadone in Vietnam. The pilot testing of the adapted EBIs demonstrated feasibility and acceptability.

TRIAL REGISTRATION

NCT04706624. Registered 13 January 2021. https://clinicaltrials.gov/ct2/show/NCT04706624.

A mixed methods exploration of injection drug use risk behaviors and place-based norms in Ukraine

INTRODUCTION

Despite global reductions in HIV incidence and significant investment in local harm reduction services, Ukraine continues to experience high HIV and HCV prevalence among people who inject drugs (PWID). Place-based factors and social norms affect drug use-related risk factors, but research has paid little attention to the relationship between drug use practices and place in Ukraine, including how these factors may contribute to or protect against HIV/HCV risk.

METHODS

This project used a sequential mixed methods design. Between March and August 2018, we interviewed 30 PWID in Dnipro, Ukraine. Participants completed a single in-depth interview in which they described where and with whom they lived; how they generated income; and where, when, how, and with whom they purchased and used drugs. Between May 2019 and March 2020, we recruited 150 PWID in Dnipro to complete a survey that was designed based on interview findings and consisted of three components: an activity space inventory, an egocentric social network inventory, and an HIV risk behavior assessment.

RESULTS

Both interview and survey respondents reported consistent use of pharmacies to acquire syringes and nearly universal use of new syringes when injecting. Interview participants reflected that while syringe sharing was previously considered a "common practice," PWID now viewed it as infrequent and unacceptable. However, interview respondents enumerated the contexts in which needle and syringe reuse occurred, including purchasing drugs directly from a dealer and chipping in with other PWID to prepare drugs bought through a stash.

CONCLUSION

Participants described relatively easy access to new needles and syringes through pharmacies and expressed strong social sanctioning against reusing needles or syringes. However, equipment sharing behaviors and norms persisted in certain contexts, creating an opportunity for further harm reduction campaigns that incorporate changing norms in these situations to "close the gap" and further reduce HIV and other infections among PWID.

"As safe as possible": a qualitative study of opioid withdrawal and risk behavior among people who use illegal opioids

BACKGROUND

Opioid withdrawal is a regular occurrence among many people who use illicit opioids (PWUIO) that has also been shown to increase their willingness to engage in risk-involved behavior. The proliferation of fentanyl in the illicit opioid market may have amplified this relationship, potentially putting PWUIO at greater risk of negative health outcomes. Understanding the relationship between withdrawal and risk-involved behavior may also have important implications for the ways that problematic drug use is conceptualized, particularly in disease models of addiction, which position risk behavior as evidence of pathology that helps to justify ontological distinctions between addicts and non-addicts. Examining withdrawal, and its role in PWUIO's willingness to engage in risk, may aid in the development of alternative theories of risk involvement and create discursive spaces for de-medicalizing and de-othering people who use illegal drugs.

METHODS

This article is based on 32 semi-structured interviews with PWUIO in the New York City area who also reported recent withdrawal experience. Interviews were conducted remotely between April and August 2022 and recorded for later transcription. Data were then coded and analyzed based on a combination of inductive and deductive coding strategies and informed by the literature.

RESULTS

Participants described a strong relationship between withdrawal and their willingness to engage in risk-involved behavior that was exacerbated by the proliferation of fentanyl. Yet, their descriptions did not align with narratives of risk as a product of bad decisions made by individuals. Rather, data demonstrated the substantial role of social and structural context, particularly drug policies like prohibition and criminalization, in the kinds of risks that PWUIO faced and their ability to respond to them.

CONCLUSIONS

Withdrawal should be taken more seriously both from an ethical perspective and as an important catalyst of risk behavior. However, theories that position activities taken to avoid withdrawal as irrational and as evidence of pathology are poorly aligned with the complexity of PWUIO's actual lives. We recommend the use of less deterministic and less medicalized theories of risk that better account for differences between how people view the world, and for the role of socio-structural forces in the production of risk.

Awareness and willingness to use HIV self-testing among people who inject drugs in Iran

BACKGROUND

Most people who inject drugs (PWID) in Iran have not undergone recent HIV testing. While PWID face barriers when seeking HIV testing at health facilities, HIV self-testing (HIVST) could be a promising approach to improve HIV testing uptake. We examined the awareness and willingness to use HIVST among PWID in Iran. We also identified participants' characteristics associated with a higher willingness to use HIVST.

METHODS

PWID were recruited in 11 cities using a respondent-driven sampling method. Willingness to use HIVST was defined as a binary variable (very low/low willingness vs. high/very high willingness). We performed multivariable modified Poisson regression to examine associated factors and report adjusted prevalence ratios (aPR) and 95% confidence intervals (CI).

RESULTS

Of 2,252 PWID, 362 (16.2%; 95% CI 14.7, 17.8) had ever heard of HIVST; however, 1,658 (73.6%; 95% CI 71.7, 75.4) reported high/very high willingness to use HIVST. Willingness to use HIVST was higher among PWID who reported having a high/moderate HIV risk perception (aPR 1.22; 95% CI 1.09, 1.37), ever experiencing homelessness (aPR 1.15; 95% CI 1.03, 1.28), > 10 years of injecting history (aPR 1.16; 95% CI 1.00, 1.34), and high injection frequency in the last three months (aPR 1.18; 95% CI 1.05, 1.32).

CONCLUSION

Most PWID in Iran, particularly those experiencing homelessness, have a longer injecting history, engage in more frequent injection practices, and possess a heightened perception of HIV risk would be willing to adopt HIVST. Enhancing HIVST awareness through increased access to HIVST and health education programs are needed. Additionally, conducting implementation science studies to effectively design and run HIVST programs in Iran can also increase PWID's access to HIV testing.

Perceptions of Long-Acting Injectable Antiretroviral Therapy Among People Living with HIV Who Use Drugs and Service Providers: a Qualitative Analysis in Rhode Island

Long-acting injectable antiretroviral therapy (LAI-ART) is a novel method to deliver HIV treatment, and the first regimen was approved in the USA in 2021. LAI-ART may mitigate barriers to oral treatment adherence, but little is known about LAI-ART perceptions among people living with HIV (PLWH) who use drugs, despite these populations facing greater barriers to treatment retention and ART adherence. We assessed LAI-ART perceptions and implementation considerations among PLWH who use drugs and health and ancillary service providers in Rhode Island. Data was collected from November 2021 to September 2022, and include in-depth interviews with 15 PLWH who use drugs and two focus groups with HIV clinical providers (n = 8) and ancillary service providers (n = 5) working with PLWH who use drugs. Data were analyzed thematically, with attention paid to how levels of structural vulnerability and social-structural environments shaped participants' LAI-ART perceptions and the HIV care continuum. Willingness to consider LAI-ART was impacted by HIV outcomes (e.g., viral suppression) and previous experiences with oral regimens, with those on stable regimens reluctant to consider alternative therapies. However, LAI-ART was seen as potentially improving HIV outcomes for PLWH who use drugs and enhancing people's quality of life by reducing stress related to daily pill-taking. Recommendations for optimal implementation of LAI-ART varied across participants and included decentralized approaches to delivery. HIV care delivery must consider the needs of PLWH who use drugs. Developing patient-centered and community-based delivery approaches to LAI-ART may address adherence challenges specific to PLWH who use drugs.

Human rights and HIV: rhetoric or determinants?

International donors and UN agencies emphasise the importance of human rights as a key determinant of HIV vulnerability and of access, uptake and retention in HIV prevention and treatment services. Yet, the extent to which HIV researchers are incorporating rights into their research, the specific rights being examined and the frequency of research assessing rights-based approaches, is unknown.

METHODS

We examined all articles published in the five highest impact-factor HIV journals: (1) Lancet HIV; (2) AIDS and Behavior; (3) AIDS; (4) Journal of the International AIDS Society (JIAS); and (5) Journal of Acquired Immune Deficiency Syndromes (JAIDS), between 1 January 2017 and 31 December 2022, for reference to 'human right(s)' or 'right(s)'. We analysed articles to assess: (1) what populations were identified in relation to specific human rights concerns; (2) what specific rights were mentioned; (3) whether researchers cited specific legal frameworks; and (4) if and what types of rights-based interventions were examined.

RESULTS

Overall, 2.8% (n=224) of the 8080 articles reviewed included a mention of 'human right(s)' or 'right(s)'. Forty-two per cent of these (n=94) were original research articles. The most common key population discussed was men who have sex with men (33 articles), followed by sex workers (21 articles) and transgender people (14 articles). Of the 94 articles, 11 mentioned the right to health and nine referenced reproductive rights. Few articles identified a specific authority-whether in national, regional or international law-for the basis of the rights cited. Fourteen articles discussed rights-based interventions.

CONCLUSION

Despite global recognition of the importance of human rights to HIV outcomes, few HIV researchers publishing in the top five cited HIV journals include attention to human rights, or rights-based interventions, in their research. When rights are mentioned, it is often without specificity or recognition of the legal basis for human rights.

Social and structural determinants of injection drug use-associated bacterial and fungal infections: A qualitative systematic review and thematic synthesis

BACKGROUND AND AIMS

Injection drug use-associated bacterial and fungal infections are increasingly common, and social contexts shape individuals' injecting practices and treatment experiences. We sought to synthesize qualitative studies of social-structural factors influencing incidence and treatment of injecting-related infections.

METHODS

We searched PubMed, EMBASE, Scopus, CINAHL and PsycINFO from 1 January 2000 to 18 February 2021. Informed by Rhodes' 'risk environment' framework, we performed thematic synthesis in three stages: (1) line-by-line coding; (2) organizing codes into descriptive themes, reflecting interpretations of study authors; and (3) consolidating descriptive themes into conceptual categories to identify higher-order analytical themes.

RESULTS

We screened 4841 abstracts and included 26 qualitative studies on experiences of injecting-related bacterial and fungal infections. We identified six descriptive themes organized into two analytical themes. The first analytical theme, social production of risk, considered macro-environmental influences. Four descriptive themes highlighted pathways through which this occurs: (1) unregulated drug supply, leading to poor drug quality and solubility; (2) unsafe spaces, influenced by policing practices and insecure housing; (3) health-care policies and practices, leading to negative experiences that discourage access to care; and (4) restrictions on harm reduction programmes, including structural barriers to effective service provision. The second analytical theme, practices of care among people who use drugs, addressed protective strategies that people employ within infection risk environments. Associated descriptive themes were: (5) mutual care, including assisted-injecting and sharing sterile equipment; and (6) self-care, including vein health and self-treatment. Within constraining risk environments, some protective strategies for bacterial infections precipitated other health risks (e.g. HIV transmission).

CONCLUSIONS

Injecting-related bacterial and fungal infections are shaped by modifiable social-structural factors, including poor quality unregulated drugs, criminalization and policing enforcement, insufficient housing, limited harm reduction services and harmful health-care practices. People who inject drugs navigate these barriers while attempting to protect themselves and their community.

The impact of border crossing and imprisonment on injection practices and risk of HIV and hepatitis C infection among men who inject drugs in Nepal

BACKGROUND

In Nepal, personal drug use is criminalized and among people who inject drugs (PWID), the majority of whom are men, movement across the border with India for drug procurement and use is common. Using a risk environment approach, this study examined associations between border crossing and imprisonment with respect to HIV, HCV and injection risk behavior among men who inject drugs in Nepal.

METHODS

This cross-sectional study analyzed data from 1345 participants from 14 districts across Nepal. Explanatory variables were prior imprisonment and past-month border crossing to procure or use drugs. We used multivariable logistic regression to evaluate associations between these variables and HIV, HCV, HIV/HCV co-infection and past-month injection risk behavior among PWID.

RESULTS

Over half of participants reported prior imprisonment (34.6% prior to past year, 21.6% within past year) and Indo-Nepal border crossing in the past year to use or buy drugs (31.2% sometimes, 20.8% often); over one quarter of participants (29.6%) reported both. Imprisonment prior to the past year was associated with higher odds of all outcome variables: HIV (adjusted odds ratio (aOR) 2.44, 95% confidence interval (CI) 1.29-4.59), HCV (aOR 1.51, 95% CI 1.08-2.09), HIV/HCV co-infection (aOR 3.12, 95% CI 1.58-6.14) and injection risk behavior (aOR 1.64, 95% CI 1.20-2.25). Past-year border crossing to procure or use drugs was associated with HCV (aOR 2.06, 95% CI 1.42-2.98) and injection risk behavior (aOR 1.47, 95% CI 1.04-2.10), with larger effect sizes among PWID who reported both border crossing as well as history of imprisonment.

CONCLUSION

Imprisonment and border crossing were associated with injection risk behavior and disease outcomes. These findings indicate a need to implement cross-border disease surveillance and harm reduction initiatives in the Indo-Nepal border region and in Nepali prisons.

Experiences of police-related stress among a U.S. national cohort of gay and bisexual men

Marginalized groups (including people of Color and sexual minorities) have been over-policed and specifically targeted based on their race/ethnicity and identity. The deleterious effects of over-policing marginalized groups include overrepresentation in the carceral system, experiencing higher rates of violence from police, and extend to affect mental health and stress levels. This study examines police-related stress among a U.S. national cohort of gay and bisexual men (collected in late 2020 and early 2021) and its association with race/ethnicity, age, human immunodeficiency virus (HIV) status, income, and other characteristics of interest. Our results show that the odds of reporting extreme police-related stress were 2.7 (95% confidence interval [CI] [2.08, 3.41]) times higher for Black individuals than for their White counterparts. Odds were also significantly greater for those who have experienced race-based (odds ratio [OR] = 2.26, 95% CI [1.81-2.82] or identity-based discrimination (OR = 2.05, 95% CI [1.66, 2.54]). Our findings demonstrate variation in police-related stress among a cohort of gay and bisexual men; with men of Color and low-income men among the most affected by police-related stress. For this population, police-related stress should be considered for its potential deleterious effect on HIV vulnerability and reporting violent crimes to police (including intimate partner violence and hate crimes).

Trends and projection of incidence, mortality, and disability-adjusted life years of HIV in the Middle East and North Africa (1990-2030)

Evidence shows a growing trend of the HIV epidemic in the Middle East and North Africa (MENA). We aimed to project the incidence, mortality, and disability-adjusted life years (DALY) in the region from 1990 to 2019 and assess its trend by 2025, and 2030. We extracted the HIV incidence, mortality, and DALY data from the Global Burden of Disease (GBD) and UNAIDS databases. The joinpoint regression model was used to examine changes in HIV trends. The trend changes were estimated by average annual percent change (AAPC). In most countries, an increasing trend was observed in HIV incidence, mortality, and DALY. Specifically, the highest growth in the annual incidence rate was related to Egypt (AAPC = 14.4, GBD) and Iran (AAPC = 9.6, UNAIDS). Notably, Qatar (AAPC = - 5.6, GBD), Bahrain (AAPC = - 3.3, GBD), and Somalia (AAPC = - 4.2, UNAIDS) demonstrated a significant reduction in incidence. Regarding mortality rates, Djibouti (AAPC = 24.2, GBD) and Iran (AAPC = 16.2, UNAIDS) exhibited a significant increasing pattern. Furthermore, the estimated increase in incidence by 2030 was most marked in Djibouti (985%) and Iran (174%). Iran (422%) and Egypt (339%) showed a prominent rise in mortality rates. GBD data showed 16 countries had an increasing pattern in DALY in both genders. According to age and period effects, there was a significant upward trend in incidence, mortality rates, and DALY. Findings highlighted the urgent need for improved prevention and treatment services, including expanding access to HIV testing, promoting safe practices, increasing antiretroviral therapy coverage, and supporting targeted interventions for high-risk populations.

Social and environmental determinants influencing injection drug use and HIV risk among two sister cities on the US-Mexico border: a comparative cross-sectional study, 2016-2018

The economic, social, cultural and political milieus that influence injection drug-related HIV risk behaviors along the US-Mexico border in the previous decade have been studied comparing cities on an East-West axis. In an effort to inform interventions targeting factors beyond the individual level, we used a cross-sectional study design comparing people who inject drugs during 2016-2018, living on a North-South axis, in two cities-Ciudad Juárez, Chihuahua, Mexico and El Paso, Texas, USA-situated at the midpoint of the 2000 US-Mexico borderland stretch. We conceptualize injection drug use and its antecedents and consequences as influenced by factors operating at various levels of influence. Results of analysis comparing samples recruited from each border city indicated significant differences in demographic, socioeconomic, micro- and macro-level factors that affect risk. Similarities emerged in individual-level risk behaviors and some dynamics of risk at the drug use site most frequented to use drugs. In addition, analyses testing associations across samples indicated that different contextual factors such as characteristics of the drug use sites influenced syringe sharing. In this article, we reflect on the potential tailored interventions needed to target the context of HIV transmission risk among people who use drugs and reside in binational environment.

Drug use patterns and related factors among female sex workers in Iran in 2019-2020: results from Integrated Bio-Behavioral Surveillance-III (IBBS-III)

INTRODUCTION

Drug use is highly prevalent among female sex workers (FSWs). Some forms of drug use, such as injecting drug users (IDU), put them at greater risks for HIV and blood born disease (BBD). In this study, the pattern of drug use and its related factors among Iranian FSWs were investigated.

MATERIALS AND METHODS

This cross-sectional study was performed based on the data of the integrated bio-behavioral surveillance-III (IBBS-III) on FSWs in 8 cities of Iran using the respondent-driven sampling (RDS) method conducting in 2019-2020. Of the 1515 FSWs participating in the IBBS-III study, 1,480 answered questions about drug use. To calculate the prevalence of drug use lifetime and in the past month, weighted analysis was used. Univariate and multivariate logistic regression was used to investigate the factors related to drug use.

RESULTS

The prevalence of lifetime drug use and the prevalence of current drug use (single and poly drug use) among FSWs were estimated to be 29.3% and 18.86%, respectively. According to multivariate regression analysis, the odds ratio (odds) of lifetime drug use showed a statistically significant association with lower education (AOR = 1.18; 95% CI: 1.07-1.3), being a direct sex worker (AOR = 1.77; 95% CI: 1.21-2.61), working in team houses or hangouts (AOR = 1.51; 95% CI: 1.10-2.06), a history of intentional abortion (AOR = 1.41; 95% CI: 1.07-1.87), condom use in the last sex (AOR = 1.61; 95% CI: 1.19-2.17), a history of imprisonment (AOR = 3.05; 95% CI: 2.25-4.14), HIV positive tests (AOR = 8.24; 95% CI: 1.66-40.9), alcohol use (AOR = 1.69; 95% CI: 1.29-2.29), and finding sexual clients in places such as parties, shopping malls, streets, and hotels, or by friends (AOR = 1.46; 95% CI: 1.01-2.12).

CONCLUSION

Given that drug use among FSWs is about 14 times higher than that of the Iranian general population, it is imperative that drug reduction programs be integrated into service packages. Specifically, prevention programs should be prioritized for occasional drug users within this population as they are at a greater risk of developing drug use issues compared to the general population.

The perspectives of street-involved youth who use drugs regarding the acceptability and feasibility of HIV pre-exposure prophylaxis: a qualitative study

Street-involved youth who use drugs (YWUD) face an elevated risk of HIV acquisition and represent a key population for HIV prevention initiatives, including pre-exposure prophylaxis (PrEP). However, little is known regarding the acceptability and feasibility of PrEP uptake and adherence among this multiply-marginalized population. Semi-structured qualitative interviews were conducted with 24 street-involved YWUD (ages 17-24) to examine their perspectives toward PrEP; youth were recruited through a longitudinal prospective cohort study in Vancouver, Canada. Youth reported high levels of ambivalence toward PrEP despite engagement in HIV-related risk behaviors. This ambivalence was driven by misperceptions regarding HIV transmission, including stigmatizing associations between HIV transmission and personal hygiene. Such misperceptions led participants to enact strategies that were ineffective in preventing HIV transmission. Participants contested their inclusion as a "key population" for PrEP, which limited their enthusiasm for PrEP uptake and adherence. Participants also highlighted that wider social-structural inequities (e.g., housing vulnerability, poverty) that produced HIV-related risks were likely to undermine sustained PrEP use. Findings demonstrate the need for tailored implementation strategies to increase PrEP acceptability, including targeted education and anti-stigma interventions to increase awareness about HIV transmission. Interventions should also target structural inequities in order to fully address HIV risk and PrEP ambivalence.

Implementation of a Dyad-Based Intervention to Improve Antiretroviral Therapy Adherence Among HIV-Positive People Who Inject Drugs in Kazakhstan: A Randomized Trial

Purpose

HIV-positive people who inject drugs (PWID) in Kazakhstan face many challenges to antiretroviral therapy (ART) adherence. Interventions that leverage social support from an intimate partner, family member, or friend may be effective in improving ART adherence among this population. The purpose of this paper is to describe the implementation process of a dyad-based intervention among HIV-positive PWID and their treatment support partners.

Method

Sixty-six HIV-positive PWID and 66 of their treatment support partners will be enrolled in this pilot randomized controlled trial in Almaty, Kazakhstan, and randomized as dyads to receive an adapted version of the SMART Couples intervention or standard of care.

Results

Several implementation strategies were used to facilitate intervention delivery, including remote delivery, training of staff, supervision, technical assistance, quality assurance, and collection of assessments through diverse sources.

Discussion

This trial responds to a need for dyad-based ART adherence interventions adapted specifically for HIV-positive PWID.

Retention of service users on opioid substitution therapy in the City of Tshwane, South Africa

BACKGROUND

Opioid substitution therapy (OST) is evidence-based treatment for opioid use disorders and, when taken as maintenance therapy, has proven health and social benefits. The benefits of OST are achieved through the retention of service users in the treatment programme.

AIM

To identify factors that affected retention of service users who had OST interrupted in less than 6 months of being in an OST programme.

SETTING

This qualitative study was conducted with 19 service users from eight Community-Oriented Substance Use Programme (COSUP) sites in the City of Tshwane, Gauteng, South Africa.

METHODS

Participants were COSUP service users who had interrupted OST in less than 6 months since initiation and were purposefully selected from all COSUP sites. Demographic information was obtained and four focus group discussions covered challenges of OST retention. Discussions were recorded, transcribed and qualitatively analysed using Attride-Stirling's thematic networks framework.

RESULTS

The 19 participants were all male, mostly black African, with a mean age of 26 years. Facilitators of retention in OST were individual readiness to change OST accessibility, positive family and peer support, treatment monitoring, understanding and managing expectations of service users, contribution in society and meaningful opportunities for engagement. Barriers were the cost of OST, bureaucracy within the programme, inability to communicate challenges timeously and effectively to treatment providers, boredom, cravings and poverty.

CONCLUSION

Opioid substitution therapy programmes can ensure a holistic approach to prevent and treat harms related to illicit opioid use if they remain person-centred and are well-funded.Contribution: Understanding the barriers to, and facilitators of retention on OST can contribute to improved community-based service delivery.

"I know why I am taking this pill": Young women navigation of disclosure and support for PrEP uptake and adherence in Eastern Cape Province, South Africa

There is limited understanding of the dynamic interplay between adolescent girl's and young women's (AGYW) disclosure and social support for using oral pre-exposure prophylaxis (PrEP) and adherence. Towards this, we conducted interviews with 42 AGYW enrolled in The Community PrEP Study who exhibited either high or low blood concentrations of tenofovir-diphosphate (TFV-DP) in dried blood spots. Guided by Theories of Practice, interviews and analysis focused on AGYW perspectives and experiences with PrEP disclosure, support and adherence. AGYW with high TFV-DP blood concentrations described larger social support networks and disclosure events. In contrast, those with low TFV-DP blood concentrations described disclosing to fewer people, resulting in limited social support. Participants discussed partner support, however, this support was not described as consequential to adherence, irrespective of TFV-DP levels. Those with high levels of TFV-DP in their blood described the ability to navigate social scrutiny and changes in social support, while those with low levels of TFV-DP in their blood were more likely to question their own continued use of PrEP. To facilitate AGYW's prevention-effective use of PrEP, expanded skill-building for disclosure and resiliency against changes to social support should be examined as part of PrEP services.

Sex Work Venue Disorder and HIV/STI Risk Among Female Sex Workers in Two México-US Border Cities: A Latent Class Analysis

Research increasingly recognizes the importance of social and built environments in shaping health, including risks for and outcomes related to HIV and sexually transmitted infections (STI), but research on sex work venues is limited. We use latent class analysis to identify patterns of sex work venue characteristics and factors associated with class membership in two México-US border cities. Among 603 female sex workers (FSW), three classes of sex work venues were identified: low, medium, and high disorder venues, characterized by level of violence, policing and drug activity. In multivariable analysis, risk exposures and outcomes varied by class, suggesting the need for place-based interventions that are tailored to specific venue profiles and that promote FSW health and safety in the workplace.

Police abuse and care engagement of people with HIV who inject drugs in Ukraine

Police abuse affects people who inject drugs (PWID), including those with HIV, and negatively impacts care engagement. This cross-sectional study evaluated police abuse among PWID receiving MOUD (medication for opioid use disorder) living with HIV and associations with HIV treatment adherence and receipt of NGO services. We assessed lifetime and past six-month rates of police abuse among a cohort of Ukrainian PWID with HIV receiving MOUD (n = 190) from August to September 2017. Logistic regression models evaluated associations between past six-month police abuse and past 30-day antiretroviral therapy (ART) adherence, and past six-month NGO service receipt. Almost all (90%) participants reported lifetime police abuse: 77% reported physical violence and 75% reported paying the police to avoid arrest. One in four females (25%) reported police-perpetrated sexual violence. Recent police abuse was reported by 16% of males and 2% of females and was not associated with ART adherence (aOR: 1.1; 95% CI:0.3-5.0) or NGO service receipt (aOR: 3.4; 95% CI:0.6-18.3). While lifetime police abuse rates were high, few participants reported recent police abuse, which was not linked to care engagement. These trends should encourage the Ukrainian government for public health-public safety partnerships and legal interventions to eliminate human rights violations against PWID living with HIV.

Modelling the impact of HIV and hepatitis C virus prevention and treatment interventions among people who inject drugs in Kenya

OBJECTIVES

People who inject drugs (PWID) in Kenya have high HIV (range across settings: 14-26%) and hepatitis C virus (HCV; 11-36%) prevalence. We evaluated the impact of existing and scaled-up interventions on HIV and HCV incidence among PWID in Kenya.

DESIGN

HIV and HCV transmission model among PWID, calibrated to Nairobi and Kenya's Coastal region.

METHODS

For each setting, we projected the impact (percent of HIV/HCV infections averted in 2020) of existing coverages of antiretroviral therapy (ART; 63-79%), opioid agonist therapy (OAT; 8-13%) and needle and syringe programmes (NSP; 45-61%). We then projected the impact (reduction in HIV/HCV incidence over 2021-2030), of scaling-up harm reduction [Full harm reduction ('Full HR'): 50% OAT, 75% NSP] and/or HIV (UNAIDS 90-90-90) and HCV treatment (1000 PWID over 2021-2025) and reducing sexual risk (by 25/50/75%). We estimated HCV treatment levels needed to reduce HCV incidence by 90% by 2030.

RESULTS

In 2020, OAT and NSP averted 46.0-50.8% (range of medians) of HIV infections and 50.0-66.1% of HCV infections, mostly because of NSP. ART only averted 12.9-39.8% of HIV infections because of suboptimal viral suppression (28-48%). Full HR and ART could reduce HIV incidence by 51.5-64% and HCV incidence by 84.6-86.6% by 2030. Also halving sexual risk could reduce HIV incidence by 68.0-74.1%. Alongside full HR, treating 2244 PWID over 2021-2025 could reduce HCV incidence by 90% by 2030.

CONCLUSION

Existing interventions are having substantial impact on HIV and HCV transmission in Kenya. However, to eliminate HIV and HCV, further scale-up is needed with reductions in sexual risk and HCV treatment.

Nurse Practitioner-Led Integrated Rapid Access to HIV Prevention for People Who Inject Drugs (iRaPID): Protocol for a Pilot Randomized Controlled Trial

BACKGROUND

The ongoing volatile opioid epidemic remains a significant public health concern, alongside continued outbreaks of HIV and hepatitis C virus among people who inject drugs. The limited access to and scale-up of medications for opioid use disorder (MOUD) among people who inject drugs, coupled with multilevel barriers to pre-exposure prophylaxis (PrEP) uptake, makes it imperative to integrate evidence-based risk reduction and HIV prevention strategies in innovative ways. To address this need, we developed an integrated rapid access to HIV prevention program for people who inject drugs (iRaPID) that incorporates same-day PrEP and MOUD for this population.

OBJECTIVE

The primary objective of this pilot study is to assess the feasibility and acceptability of the program and evaluate its preliminary efficacy on PrEP and MOUD uptake for a future randomized controlled trial (RCT). We also aim to explore information on the implementation of the program in a real-world setting using a type I hybrid implementation trial design.

METHODS

Using a type I hybrid implementation trial design, we are pilot testing the nurse practitioner-led iRaPID program while exploring information on its implementation in a real-world setting. Specifically, we will assess the feasibility and acceptability of the iRaPID program and evaluate its preliminary efficacy on PrEP and MOUD uptake in a pilot RCT. The enrolled 50 people who inject drugs will be randomized (1:1) to either iRaPID or treatment as usual (TAU). Behavioral assessments will occur at baseline, and at 1, 3, and 6 months. Additionally, we will conduct a process evaluation of the delivery and implementation of the iRaPID program to collect information for future implementation.

RESULTS

Recruitment began in July 2021 and was completed in August 2022. Data collection is planned through February 2023. The Institutional Review Boards at Yale University and the University of Connecticut approved this study (2000028740).

CONCLUSIONS

This prospective pilot study will test a nurse practitioner-led, integrated HIV prevention program that incorporates same-day PrEP and MOUD for people who inject drugs. This low-threshold protocol delivers integrated prevention via one-stop shopping under the direction of nurse practitioners. iRaPID seeks to overcome barriers to delayed PrEP and MOUD initiation, which is crucial for people who inject drugs who have had minimal access to evidence-based prevention.

TRIAL REGISTRATION

ClinicalTrials.gov NCT04531670; https://clinicaltrials.gov/ct2/show/NCT04531670.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

DERR1-10.2196/42585.

Crack cocaine use frequency is associated with HIV disease severity independent of antiretroviral therapy exposure: a prospective cohort study

We sought to evaluate the effect of crack cocaine use frequency on HIV disease severity among HIV-positive people who use unregulated drugs (PWUD). We analyzed data from the ACCESS study, an open prospective cohort of HIV-positive PWUD including comprehensive HIV clinical monitoring in a setting with no-cost healthcare. Multivariable generalized linear mixed-effects models were used to estimate the independent effect of time-updated crack cocaine use frequency on HIV disease severity, adjusting for ART exposure and relevant confounders. In multivariable adjusted models, daily or greater frequency of crack cocaine use was significantly associated with higher VACS Index scores (β = 0.8, 95% confidence interval: 0.1, 1.5) as compared to none. Our finding suggests that daily or greater frequency of crack cocaine use exacerbates HIV disease severity independent of ART exposure. The observed effect may reflect an underlying biological mechanism or other factors linked with crack cocaine use; further investigation is warranted.

The Role of Context in Integrating Buprenorphine into a Drop-In Center in Kampala, Uganda, Using the Consolidated Framework for Implementation Research

BACKGROUND

Although Africa has long borne the brunt of the human immunodeficiency virus (HIV) epidemic, until recently, the continent has been considered largely free of illicit drug use and injection drug use in particular. In Uganda, the number of people who use or inject drugs (PWUD and PWID, respectively) has increased, and PWID are a key population at high risk for human immunodeficiency virus (HIV) and hepatitis C virus (HCV) infection. However, harm reduction practices, including providing clean injection equipment and medication-assisted treatment (MAT), have only recently been piloted in the country. This project aims to integrate buprenorphine into a harm reduction drop-in center (DIC).

METHODS

The Consolidated Framework for Implementation Research was used to guide our preparations to integrate buprenorphine into existing practices at a harm reduction DIC. We conducted key informant interviews with members of a community advisory board and DIC staff to document this process, its successes, and its failures.

RESULTS

Results indicate that criminalization of drug use and stigmatization of PWUD challenged efforts to provide buprenorphine treatment in less regulated community settings.

CONCLUSIONS

DIC staff and their commitment to harm reduction and advocacy facilitated the process of obtaining necessary approvals.

Types of criminal legal system exposure and polysubstance use: Prevalence and correlates among U.S. adults in the National Survey on Drug Use and Health, 2015-2019

INTRODUCTION

Criminal legal system (CLS) exposed adults experience higher rates of substance use, substance use disorder (SUD), and overdose. As most CLS exposed adults are not incarcerated, it is important to focus on CLS exposure across the carceral continuum.

METHODS

This research used pooled data from adult respondents (N = 206,314) in the National Survey on Drug Use and Health (2015-2019). Survey weighted descriptive statistics and Poisson regression were used to estimate prevalence of polysubstance use (i.e., concurrent use) across CLS exposure types (i.e., arrest, probation, parole), identifying relevant correlates.

RESULTS

The prevalence of polysubstance use was higher among CLS exposed adults, and nearly two-thirds of CLS exposed adults who used multiple types of substances indicated having an SUD. Comparing CLS exposure types, polysubstance use was less likely among adults on probation (IRR=0.89, 95%CI=0.84,0.94) or parole (IRR=0.82, 95%CI=0.76,0.87) compared to those arrested. Polysubstance use was also more likely among adults on probation (IRR=1.09, 95%CI =1.01,1.17) compared to those on parole. While some characteristics (i.e., age, ethnicity, SUD) were consistently associated with polysubstance use across types of CLS exposure, other characteristics (i.e., sexual identity, marital status, suicidal ideation) were not.

CONCLUSIONS

There is heterogeneity in health risks as a function of CLS exposure type. Further research is needed to identify causal mechanisms and differences based on demographic characteristics. Given high levels of polysubstance use across CLS exposure types, a shift towards a more comprehensive approach in substance use epidemiology may facilitate building an evidence-base to maximize treatment related interventions to reduce polysubstance-involved overdoses.

Change in distress about police brutality and substance use among young people, 2017-2020

BACKGROUND

It is unknown whether increasing attention to police brutality is a source of stress associated with substance use risk among young people.

METHODS

A longitudinal racially/ethnically diverse cohort from Los Angeles, California (n = 1797) completed baseline (2017; mean age: 17.9) and follow-up (2020; mean age: 21.2) surveys assessing level of concern, worry, and stress about police brutality (range: 0 'not at all' - 4 'extremely') and past 30-day nicotine, cannabis, alcohol, other drug, and number of substances used (0-19). Regression models, adjusted for demographic characteristics and baseline substance use, evaluated whether changes in distress about police brutality from 2017 to 2020 were associated with substance use in 2020 overall and stratified by race/ethnicity.

RESULTS

Distress about police brutality increased between 2017 (mean: 1.59) and 2020 (mean: 2.43) overall. Black/African American and Hispanic/Latino respondents consistently had the highest mean distress levels at both timepoints. In the full sample, each one-unit greater increase in distress about police brutality from 2017 to 2020 was associated with 11% higher odds of cannabis use, 13% higher odds of alcohol use, and 8% higher risk of using an additional substance for the number of substances used outcome. Race/ethnicity-stratified models indicated that greater increases in distress from 2017 to 2020 was associated with substance use among Black/African American, Hispanic, and multiracial respondents in 2020, but not Asian American/Pacific Islander and White respondents.

CONCLUSIONS

Distress about police brutality may be associated with substance use, particularly among certain racial/ethnic minority young people. Further investigation of whether police brutality affects health in disparity populations is needed.

Determinants of health among people who use illicit drugs in the conflict-affected countries of Afghanistan, Colombia and Myanmar: a systematic review of epidemiological evidence

BACKGROUND

Afghanistan, Colombia and Myanmar are the world's leading heroin and cocaine producers and have also experienced prolonged periods of armed conflict. The link between armed conflict and drug markets is well established but how conflict impacts on the health and social determinants of people who use drugs is less clear. The aim was to investigate health outcomes and associated factors among people who use illicit drugs in Afghanistan, Colombia and Myanmar.

METHODS

We conducted a systematic review searching Medline, EMBASE, PsychINFO and Global Health databases using terms relating to Afghanistan, Colombia and Myanmar; illicit drug use (all modes of drug administration); health and influencing factors. Quality assessment was assessed with the Newcastle-Ottawa-Scale and papers were analysed narratively.

RESULTS

35 studies were included in Afghanistan (n = 15), Colombia (n = 9) and Myanmar (n = 11). Health outcomes focused predominantly on HIV, Hepatitis C (HCV), Hepatitis B and sexually transmitted infections (STIs), with one study looking at human rights violations (defined as maltreatment, abuse and gender inequality). Drug use was predominantly injection of heroin, often alongside use of amphetamines (Myanmar), cocaine and cocaine-based derivatives (Colombia). Only one study measured the effect of a period of conflict suggesting this was linked to increased reporting of symptoms of STIs and sharing of needles/syringes among people who inject drugs. Findings show high levels of external and internal migration, alongside low-income and unemployment across the samples. External displacement was linked to injecting drugs and reduced access to needle/syringe programmes in Afghanistan, while initiation into injecting abroad was associated with increased risk of HCV infection. Few studies focused on gender-based differences or recruited women. Living in more impoverished rural areas was associated with increased risk of HIV infection.

CONCLUSIONS

More research is needed to understand the impact of armed-conflict and drug production on the health of people who use drugs. The immediate scale-up of harm reduction services in these countries is imperative to minimize transmission of HIV/HCV and address harms associated with amphetamine use and other linked health and social care needs that people who use drugs may face.

Impact of COVID-19 on substance use disorder treatment services in Kenya: Qualitative findings from healthcare providers

BACKGROUND

People who inject drugs are at an increased risk for contracting SARS-CoV-2 and have experienced barriers to accessing harm reduction services during the COVID-19 pandemic. Understanding how to best provide these services is essential for COVID-19 mitigation. The goal of this study was to ascertain challenges and successes for caring for people who inject drugs in Kenya during the COVID-19 pandemic.

METHODS

We conducted focus group discussions and one-on-one key informant interviews with healthcare providers who work with people who inject drugs in Kenya. Interviews explored how COVID-19 and social distancing measures impacted service provision, as well as what strategies were used to overcome these barriers. We used thematic analysis to analyze transcribed interviews.

RESULTS

Participants included 29 service providers from 11 healthcare professions at three medication assisted treatment (MAT) and four drop-in center (DIC) sites (N=15 males and N=14 females, with an average age of 35 years). Four overarching themes emerged in our thematic analysis in which providers described both barriers to providing care and solutions to overcome them: (1) COVID-19-related misconceptions; (2) Limited COVID-19 testing and screening; (3) Structural changes related to service provision; and (4) Access to material resources such as meals, needle and syringe program kits, and personal protective equipment.

CONCLUSIONS

Our findings demonstrate the COVID-19 pandemic-imposed challenges for substance use disorder treatment providers and patients, however with ingenuity many of these challenges were able to be overcome.

Constructing Taxonomies: Identifying Distinctive Class of HIV Support and Risk Networks among People Who Use Drugs (PWID) and Their Network Members in the HPTN 037 Randomized Controlled Trial

Injection drug use is a significant mode of HIV transmission. Social networks are potential avenues for behavior change among high-risk populations. Increasing knowledge should include a classification or taxonomy system of networks’ attributes, risks, and needs. The current study employed 232 networks comprising 232 indexes, with 464 network members enrolled in Philadelphia. LCA revealed a three-class solution, Low-Risk, Paraphernalia Risk, and High Sex/Moderate Paraphernalia Risk class, among participants. The analysis found receiving money or drugs for sex and employment status increased the odds of belonging to PR and PSR classes. Homelessness and incarceration increased the odds of belonging to the PR class when compared to the LR class. Our findings suggest that classes of risk among PWID comprise clusters of information concerning their members. These findings add depth to our understanding while extending our knowledge of the contextual environment that nurtures or exacerbates the problem.