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Dive into the research topics where Nickolas Zaller is active.

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Featured researches published by Nickolas Zaller.


Hepatology | 2013

Incidence and prevalence of hepatitis C in prisons and other closed settings: Results of a systematic review and meta‐analysis

Sarah Larney; Hannah Kopinski; Curt G. Beckwith; Nickolas Zaller; Don C. Des Jarlais; Holly Hagan; Josiah D. Rich; Brenda J van den Bergh; Louisa Degenhardt

People detained in prisons and other closed settings are at elevated risk of infection with hepatitis C virus (HCV). We undertook a systematic review and meta‐analysis with the aim of determining the rate of incident HCV infection and the prevalence of anti‐HCV among detainees in closed settings. We systematically searched databases of peer‐reviewed literature and widely distributed a call for unpublished data. We calculated summary estimates of incidence and prevalence among general population detainees and detainees with a history of injection drug use (IDU), and explored heterogeneity through stratification and meta‐regression. The summary prevalence estimates were used to estimate the number of anti‐HCV positive prisoners globally. HCV incidence among general detainees was 1.4 per 100 person‐years (py; 95% confidence interval [CI]: 0.1, 2.7; k = 4), and 16.4 per 100 py (95% CI: 0.8, 32.1; k = 3) among detainees with a history of IDU. The summary prevalence estimate of anti‐HCV in general detainees was 26% (95% CI: 23%, 29%; k = 93), and in detainees with a history of IDU, 64% (95% CI: 58%, 70%; k = 51). The regions of highest prevalence were Central Asia (38%; 95% CI 32%, 43%; k = 1) and Australasia (35%; 95% CI: 28%, 43%; k = 9). We estimate that 2.2 million (range: 1.4‐2.9 million) detainees globally are anti‐HCV positive, with the largest populations in North America (668,500; range: 553,500‐784,000) and East and Southeast Asia (638,000; range: 332,000‐970,000). Conclusion: HCV is a significant concern in detained populations, with one in four detainees anti‐HCV‐positive. Epidemiological data on the extent of HCV infection in detained populations is lacking in many countries. Greater attention towards prevention, diagnosis, and treatment of HCV infection among detained populations is urgently required. (Hepatology 2013;58:1215–1224)


Current Drug Abuse Reviews | 2011

Buprenorphine and Buprenorphine/Naloxone Diversion, Misuse, and Illicit Use: An International Review

Michael A. Yokell; Nickolas Zaller; Traci C. Green; Josiah D. Rich

The diversion, misuse, and non-medically supervised use of buprenorphine and buprenorphine/naloxone by opioid users are reviewed. Buprenorphine and buprenorphine/naloxone are used globally as opioid analgesics and in the treatment of opioid dependency. Diversion of buprenorphine and buprenorphine/naloxone represents a complex medical and social issue, and has been widely documented in various geographical regions throughout the world. We first discuss the clinical properties of buprenorphine and its abuse potential. Second, we discuss its diversion and illicit use on an international level, as well as motivations for those activities. Third, we examine the medical risks and benefits of buprenorphines non-medically supervised use and misuse. These risks and benefits include the effect of buprenorphines use on HIV risk and the risk of its concomitant use with other medications and drugs of abuse. Finally, we discuss the implications of diversion, misuse, and non-medically supervised use (including potential measures to address issues of diversion); and potential areas for further research.


Journal of Acquired Immune Deficiency Syndromes | 2010

Opportunities to Diagnose, Treat, and Prevent HIV in the Criminal Justice System

Curt G. Beckwith; Nickolas Zaller; Jeannia J. Fu; Brian T. Montague; Josiah D. Rich

Persons involved with the criminal justice system are at risk for HIV and other transmissible diseases due to substance use and related risk behaviors. Incarceration provides a public health opportunity to test for HIV, viral hepatitis, and other sexually transmitted infections, provide treatment such as highly active antiretroviral therapy, and link infected persons to longitudinal comprehensive HIV care upon their release for such comorbidities as addiction and mental illness. Delivering health interventions inside prisons and jails can be challenging, yet the challenges pale in comparison to the benefits of interventions for inmates and their communities. This article reviews the current state of delivering HIV testing, prevention, treatment, and transition services to incarcerated populations in the United States. It concludes with summary recommendations for research and practice to improve the health of inmates and their communities.


Journal of Health Care for the Poor and Underserved | 2008

Linkage to Treatment and Supportive Services Among HIV-Positive Ex-Offenders in Project Bridge

Nickolas Zaller; Leah Holmes; Angela Dyl; Jennifer A. Mitty; Curt G. Beckwith; Timothy P. Flanigan; Josiah D. Rich

HIV-positive inmates often have histories of substance use, mental illness, and homelessness. Access to supportive services is important for members of this population upon their release from prison to improve continuity of medical care in the community. This paper briefly reviews Project Bridge, a federally funded demonstration project that provided intensive case management for HIV positive ex-offenders. Methods. Ex-offenders received 18 months of intensive case management by teams of a professional social worker and an outreach worker between May 2003 and December 2005. Client contacts were weekly for 12 weeks and, at a minimum, monthly thereafter. Results. Most clients (95%) received medical care throughout their enrollment. Of all clients in Project Bridge, 45.8% secured housing, 71% were linked to mental health care, and 51% were linked to addiction services. Conclusion. Despite high levels of addiction (97%) and mental health disorders (34% on medication), ex-offenders were retained in health care for a year after being released from incarceration.


Journal of Addiction Medicine | 2011

Illicit use of buprenorphine/naloxone among injecting and noninjecting opioid users.

Alexander R. Bazazi; Michael A. Yokell; Jeannia J. Fu; Josiah D. Rich; Nickolas Zaller

Objectives:We examined the use, procurement, and motivations for the use of diverted buprenorphine/naloxone among injecting and noninjecting opioid users in an urban area. Methods:A survey was self-administered among 51 injecting opioid users and 49 noninjecting opioid users in Providence, RI. Participants were recruited from a fixed-site syringe exchange program and a community outreach site between August and November 2009. Results:A majority (76%) of participants reported having obtained buprenorphine/naloxone illicitly, with 41% having done so in the previous month. More injection drug users (IDUs) than non-IDUs reported the use of diverted buprenorphine/naloxone (86% vs 65%, P = 0.01). The majority of participants who had used buprenorphine/naloxone reported doing so to treat opioid withdrawal symptoms (74%) or to stop using other opioids (66%) or because they could not afford drug treatment (64%). More IDUs than non-IDUs reported using diverted buprenorphine/naloxone for these reasons. Significantly more non-IDUs than IDUs reported ever using buprenorphine/naloxone to “get high” (69% vs 32%, P < 0.01). The majority of respondents, both IDUs and non-IDUs, were interested in receiving treatment for opioid dependence, with greater reported interest in buprenorphine/naloxone than in methadone. Common reasons given for not being currently enrolled in a buprenorphine/naloxone program included cost and unavailability of prescribing physicians. Conclusions:The use of diverted buprenorphine/naloxone was common in our sample. However, many opioid users, particularly IDUs, were using diverted buprenorphine/naloxone for reasons consistent with its therapeutic purpose, such as alleviating opioid withdrawal symptoms and reducing the use of other opioids. These findings highlight the need to explore the full impact of buprenorphine/naloxone diversion and improve the accessibility of buprenorphine/naloxone through licensed treatment providers.


Aids Patient Care and Stds | 2011

Low Perceived Risk and High HIV Prevalence Among a Predominantly African American Population Participating in Philadelphia's Rapid HIV Testing Program

Amy Nunn; Nickolas Zaller; Alexandra Cornwall; Kenneth H. Mayer; Elya Moore; Samuel Dickman; Curt G. Beckwith

African Americans are disproportionately infected with HIV/AIDS. Despite Centers for Disease Control and Prevention (CDC) guidelines recommending routine opt-out testing for HIV, most HIV screening is based on self-perceived HIV risks. Philadelphia launched a rapid HIV testing program in seven public health clinics in 2007. The program provides free rapid oral HIV tests to all patients presenting for health services who provide informed consent. We analyzed demographic, risk behavior, and HIV serostatus data collected during the program between September 2007 and January 2009. We used multivariable logistic regression to estimate the association between behavioral and demographic factors and newly diagnosed HIV infection. Of the 5871 individuals testing for HIV, 47% were male, 88% were African American, and the mean age was 34.7 years. Overall HIV prevalence was 1.1%. All positive tests represented new HIV diagnoses, and 72% of individuals reported testing previously. Approximately 90% of HIV-positive individuals and 92% of individuals with more than five recent sex partners never, or only sometimes, used condoms. Two thirds of individuals testing positive and 87% of individuals testing negative assessed their own HIV risk as zero or low. Individuals reporting cocaine use and ever having a same sex partner both had 2.6 times greater odds of testing positive. Condom use in this population was low, even among high-risk individuals. Philadelphias program successfully provided HIV testing to many underserved African Americans who underestimate their HIV risk. Our results nevertheless suggest greater efforts are needed to encourage more individuals to undergo HIV testing in Philadelphia, particularly those who have never tested.


Journal of Acquired Immune Deficiency Syndromes | 2010

Testing for HIV, sexually transmitted infections, and viral hepatitis in jails: still a missed opportunity for public health and HIV prevention.

Timothy P. Flanigan; Nickolas Zaller; Curt G. Beckwith; Lauri Bazerman; Aadia Rana; Adrian Gardner; David A. Wohl; Frederick L. Altice

Jails provide an underutilized public health opportunity for screening for HIV, sexually transmitted infections (STIs), and viral hepatitis, and for such other infectious diseases as tuberculosis. Incarcerated individuals are more likely to be men, poor, persons of color, and at high risk for HIV. The vast majority of jails in the United States do not screen routinely for HIV or STIs, thereby missing an opportunity for HIV and STI diagnosis, treatment, and prevention. Nesting HIV testing within STI testing and treatment in conjunction with testing and treatment for other infectious diseases, as appropriate based on community prevalence, provides a public health opportunity and will enhance HIV prevention. HIV testing and linkage to care, both within corrections and in the community, comprise an important component of the “seek and treat” strategy to further prevent HIV infection. Jail-based screening of infectious diseases, especially for HIV and STIs, in conjunction with treatment and linkage to community care has thus far been a neglected component of HIV prevention among high-risk communities.


International Journal of Environmental Research and Public Health | 2009

Attitudes toward Methadone among Out-of-Treatment Minority Injection Drug Users: Implications for Health Disparities

Nickolas Zaller; Alexander R. Bazazi; Lavinia Velazquez; Josiah D. Rich

Injection drug use (IDU) continues to be a significant public health issue in the U.S. and internationally, and there is evidence to suggest that the burden of injection drug use and associated morbidity and mortality falls disproportionately on minority communities. IDU is responsible for a significant portion of new and existing HIV/AIDS cases in many parts of the world. In the U.S., the prevalence of HIV and hepatitis C virus is higher among populations of African-American and Latino injection drug users (IDUs) than among white IDUs. Methadone maintenance therapy (MMT) has been demonstrated to effectively reduce opiate use, HIV risk behaviors and transmission, general mortality and criminal behavior, but opiate-dependent minorities are less likely to access MMT than whites. A better understanding of the obstacles minority IDUs face accessing treatment is needed to engage racial and ethnic disparities in IDU as well as drug-related morbidity and mortality. In this study, we explore knowledge, attitudes and beliefs about methadone among 53 out-of-treatment Latino and African-American IDUs in Providence, RI. Our findings suggest that negative perceptions of methadone persist among racial and ethnic minority IDUs in Providence, including beliefs that methadone is detrimental to health and that people should attempt to discontinue methadone treatment. Additional potential obstacles to entering methadone therapy include cost and the difficulty of regularly attending a methadone clinic as well as the belief that an individual on MMT is not abstinent from drugs. Substance use researchers and treatment professionals should engage minority communities, particularly Latino communities, in order to better understand the treatment needs of a diverse population, develop culturally appropriate MMT programs, and raise awareness of the benefits of MMT.


Aids Care-psychological and Socio-medical Aspects of Aids\/hiv | 2007

A model of integrated primary care for HIV-positive patients with underlying substance use and mental illness

Nickolas Zaller; Fizza S. Gillani; Josiah D. Rich

Abstract There is a high burden of underlying substance use and mental illness in HIV-infected populations. HIV-care settings provide an important opportunity to assess substance and mental health needs among HIV-positive patients and to provide or make referrals for appropriate treatment services. In 2003, with funding from the Center for Substance Abuse Treatment (CSAT), we developed a model of integrated substance-use counselling and referral for treatment within a primary care HIV-care setting at The Miriam Hospital in Providence, Rhode Island. The project uses a multidisciplinary approach to provide linkage to treatment services for substance use and mental illness as well as to help participants with social service needs, such as housing and medical coverage, to ensure continuity of care and optimal HIV treatment adherence. Twelve percent of the 965 HIV-infected patients in care at our center have been enroled in the project. Of these, all have a current substance-use disorder and 79.3% have been diagnosed with a mental illness. In addition, most participants are hepatitis C-positive (HCV) (65.5%). The majority of participants are on antiretroviral therapy (76.7%). Participants have been referred for the following treatment modalities: intensive outpatient services, methadone, buprenorphine, outpatient services and residential as well as individual and group counselling. Our model has been successful in assessing the substance-use and mental health needs of HIV-infected individuals with numerous co-morbidities and referring them for ancillary medical and social services.


Substance Abuse | 2012

A randomized trial of methadone initiation prior to release from incarceration.

Michelle McKenzie; Nickolas Zaller; Samuel Dickman; Traci C. Green; Amisha Parihk; Peter D. Friedmann; Josiah D. Rich

Individuals who use heroin and illicit opioids are at high risk for infection with human immunodeficiency virus (HIV) and other blood-borne pathogens, as well as incarceration. The purpose of the randomized trial reported here is to compare outcomes between participants who initiated methadone maintenance treatment (MMT) prior to release from incarceration, with those who were referred to treatment at the time of release. Participants who initiated MMT prior to release were significantly more likely to enter treatment postrelease (P < .001) and for participants who did enter treatment, those who received MMT prerelease did so within fewer days (P = .03). They also reported less heroin use (P = .008), other opiate use (P = .09), and injection drug use (P = .06) at 6 months. Initiating MMT in the weeks prior to release from incarceration is a feasible and effective way to improve MMT access postrelease and to decrease relapse to opioid use.

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Sarah Larney

National Drug and Alcohol Research Centre

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Hongbo Zhang

Anhui Medical University

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