Serena P. Koenig

Community-based approaches to HIV treatment in resource-poor settings

Last year, HIV surpassed other pathogens to become the world’s leading infectious cause of adult death. More than 90% of deaths occur in poor countries, yet new antiretroviral therapies have only led to a drop in AIDS deaths in industrialised countries. The main objections to the use of these agents in less-developed countries have been their high cost and the lack of health infrastructure necessary to use them. We have shown that it is possible to carry out an HIV treatment programme in a poor community in rural Haiti, the poorest country in the western hemisphere. Relying on an already existing tuberculosis-control infrastructure, we have been able to provide directly observed therapy with highly-active antiretroviral therapy (HAART) to about 60 patients with advanced HIV disease. Inclusion criteria and clinical follow-up were based on basic laboratory data available in most rural clinics. Serious side-effects have been rare and readily managed by community-health workers and clinic staff. We discuss objections to the widespread use of HAART, and suggest that directly-observed therapy of chronic infectious disease with multidrug regimens can be highly effective in settings of great privation as long as there is sustained commitment to uninterrupted care that is free to the patient. Why AIDS prevention alone is insufficient The dimensions of the global HIV crisis are such that predictions termed alarmist a decade ago are now revealed as sober projections. 1

Scaling-up HIV treatment programmes in resource-limited settings: the rural Haiti experience.

Objective: To scale-up a successful HIV/AIDS treatment project and provide comprehensive care to an entire Département du Centre (population 550 000) in rural Haiti, thereby demonstrating that community-based treatment of HIV is feasible and highly effective in resource-limited settings, and serving as a successful model for others to replicate. Participants: In the Département du Centre of rural Haiti comprehensive HIV and tuberculosis treatment is provided free of charge to anyone who presents for care. All those who meet clinical enrolment criteria are treated with highly active antiretroviral therapy (HAART). Intervention: HAART was provided in the context of a comprehensive programme of HIV, tuberculosis (TB), sexually transmitted disease (STD) of the project, treatment and prevention, and womens health services at four sites in the first year. At each site, the medical facility was renovated, additional staff were hired as needed, and a network of accompagnateurs (community health workers) was established throughout the surrounding villages to serve as a link with the community, and to provide directly observed treatment (DOT). Results: In the first year of programme scale-up, over 8000 patients were followed for HIV, and over 1050 were treated with DOT HAART. Adherence to HAART was very high, and clinical outcomes were excellent: all patients responded with weight gain and improved functional capacity, and fewer than 5% required medication changes due to side effects. Viral load was tested among a subset of patients showing that 86% had undetectable viral loads. Conclusion: Community-based care of AIDS has been highly effective in rural Haiti. With more international financial support for HIV/AIDS treatment in resource-limited settings, there should be no barriers to access to life-saving HAART for those who need it most.

Meeting cholera's challenge to Haiti and the world: a joint statement on cholera prevention and care.

Cholera in Haiti: Acute-on-Chronic Long before the devastating earthquake on January 12, 2010, Haiti struggled beneath the burdens of intractable poverty and ill health. The poorest country in the Western Hemisphere, Haiti also faces some of the highest rates of maternal and infant mortality—widely used indicators of the robustness of a health system—in the world ([S1] in Text S1; [2], [3]). The October 2010 cholera outbreak is the most recent of a long series of affronts to the health of Haitis population; it is yet another acute symptom of the chronic weakness of Haitis health, water, and sanitation systems. Water and sanitation conditions highlight these systemic weaknesses. In 2002, Haiti ranked last out of 147 countries for water security [4], [5]. Before the earthquake struck, only half of the population in the capital, Port-au-Prince, had access to latrines or other forms of modern sanitation, and roughly one-third had no access to tap water [6]. Across the country, access to sanitation and clean water is even more limited: only 17% of Haitians had access to adequate sanitation in 2008, and 12% received treated water [7]. Not surprisingly, diarrheal diseases have long been a significant cause of death and disability, especially among children under 5 years of age [6]. The cholera outbreak began less than a year after a 7.0-magnitude earthquake took the lives of more than 300,000 people and left nearly 1.5 million homeless [6]. Almost 1 million Haitians still live in spontaneous settlements known as internally displaced persons (IDP) camps [8]. While post-earthquake conditions in Haiti were ripe for outbreaks of acute diarrheal illness, cholera was deemed “very unlikely to occur” by the United States Centers for Disease Control and Prevention (CDC) and other public health authorities [9]. Cholera had never before been reported in Haiti [S2] [10], [11]; health providers were unprepared for an influx of patients presenting with acute watery diarrhea. The cholera epidemic has been most severe in rural areas and large urban slums. Rural communities were charged with hosting hundreds of thousands of displaced people after the earthquake, placing greater demands on their already-scarce resources, including water. Surface water drawn directly from the source or piped from rivers and streams constitutes the principal supply of drinking water in rural Haiti. The lack of adequate piping, filtration, and water treatment systems (including chlorination) made these rural regions vulnerable to the rapid spread of waterborne disease. While most IDP camps have been supplied with potable water, large urban slums have had to rely on existing water sources—some of them containing Vibrio cholerae—and have therefore been vulnerable to rapid disease spread. Most slums also have poor sanitation infrastructure. Since the first cases were reported in Saint-Marc and Mirebalais, cholera has spread to every department in Haiti, and to other countries, too [S3] [12]–[14]. Public suspicion (ultimately validated by genomic sequence analyses [15]) of the strains link to South Asia, home to a group of United Nations peacekeepers stationed in central Haiti, triggered blame and violence that interfered with response efforts. As we have learned from the global AIDS pandemic and other infectious disease epidemics, cycles of accusation can continue for years, diverting attention and resources from the delivery of care and prevention services [16]. Systemic problems that brought cholera to epidemic levels in Haiti will (unless addressed) continue to facilitate its spread. As a disease of poverty, cholera preys upon the bottom of the social gradient; international trade, migration, and travel—from South Asia or elsewhere—open direct channels for pathogens that follow social fault lines.

Predicting the impact of antiretrovirals in resource-poor settings: preventing HIV infections whilst controlling drug resistance.

There is currently an opportunity to carefully plan the implementation of antiretroviral (ARV) therapy in the developing world. Here, we use mathematical models to predict the potential impact that low to moderate usage rates of ARVs might have in developing countries. We use our models to predict the relationship between the specific usage rate of ARVs (in terms of the percentage of those infected with HIV who receive such treatment) and: (i) the prevalence of drug-resistant HIV that will arise, (ii) the future transmission rate of drug-resistant strains of HIV, and (iii) the cumulative number of HIV infections that will be prevented through more widespread use of ARVs. We also review the current state of HIV/AIDS treatment programs in resource-poor settings and identify the essential elements of a successful treatment project, noting that one key element is integration with a strong prevention program. We apply both program experience from Haiti and Brazil and the insights gleaned from our modeling to address the emerging debate regarding the increased availability of ARVs in developing countries. Finally, we show how mathematical models can be used as tools for designing robust health policies for implementing ARVs in developing countries. Our results demonstrate that designing optimal ARV-based strategies to control HIV epidemics is extremely complex, as increasing ARV usage has both beneficial and detrimental epidemic-level effects. Control strategies should be based upon the overall impact on the epidemic and not simply upon the impact ARVs will have on the transmission and/or prevalence of ARV-resistant strains.

High Mortality among Patients with AIDS Who Received a Diagnosis of Tuberculosis in the First 3 Months of Antiretroviral Therapy

We analyzed mortality among 201 patients with AIDS and tuberculosis in Haiti. Patients who received a diagnosis of tuberculosis during the first 3 months after the initiation of antiretroviral therapy were 3.25 times more likely to die than were other patients with AIDS and tuberculosis. Failure to recognize active tuberculosis at initiation of antiretroviral therapy leads to increased mortality.

Medical student exposure to blood and infectious body fluids.

Few data assess the exposure of students to blood or other potentially infectious body fluids during medical school. Fourth-year medical students completed a written survey immediately before graduation describing exposures during their last 2 years. Nearly one half of all graduating students recalled at least one exposure, with only 40% of these exposures reported to supervising house staff or faculty. Clerkships with the highest exposure rates were emergency medicine, surgery, and obstetrics-gynecology.

Depression, Substance Abuse and Other Contextual Predictors of Adherence to Antiretroviral Therapy (ART) Among Haitians

Haiti has the highest number of individuals living with HIV in the Caribbean. Due to Haiti’s resource-poor environment and inadequate mental health and substance abuse services, adherence to antiretroviral therapy (ART) may be especially difficult. This study examined associations among demographics, maladaptive coping, partner conflict, alcohol problems, depression, and negative attitudes about medications and their impact on adherence among 194 HIV-positive Haitians. In a mediated directional structural equation model, depression and negative attitudes about ART directly predicted poorer adherence. Greater partner conflict, maladaptive coping and alcohol problems predicted more depression. Maladaptive coping predicted a negative attitude about ART. Alcohol problems predicted partner conflict and maladaptive coping. Significant indirect effects on adherence mediated through both depression and negative attitudes about ART include negative effects of female gender, alcohol problems and maladaptive coping. Results highlight the importance of integrated care for depression, alcohol use and other psychosocial problems to increase ART adherence.ResumenHaití tiene el número más alto de personas que viven con el VIH en el Caribe. Debido a la escases de recursos y servicios de salud mental y tratamiento del abuso de sustancias psicoactivas en el entorno Haitiano, la adherencia a la terapia antirretroviral (TARV) se puede volver especialmente difícil. Este estudio examinó asociaciones entre características demográficas, métodos inadaptados de lidiar, conflicto con la pareja, problemas relacionados al consumo del alcohol, la depresión, y las actitudes negativas sobre los medicamentos, y el impacto de dichas variables en la adherencia en 194 haitianos VIH-positivos. En un modelo de ecuación estructural, la depresión y las actitudes negativas sobre la TARV directamente predecían una adherencia inferior. Niveles más altos de conflicto con la pareja, métodos inadaptados de lidiar y problemas relacionados al consumo del alcohol predecían más depresión. Los métodos inadaptados de lidiar predecían una actitud negativa frente a la TARV. Problemas con el consumo del alcohol predecían conflicto con la pareja y métodos inadaptados de lidiar. Efectos indirectos significativos que afectan la adherencia mediados por ambas la depresión y las actitudes negativas sobre la TARV incluyen los efectos negativos del sexo femenino, problemas relacionados al consumo del alcohol y los métodos inadaptados de lidiar. Estos hallazgos recalcan la necesidad de una atención integral para la depresión, el consumo de alcohol y los problemas psicosociales para aumentar la adherencia a la TARV.

Monitoring HIV treatment in developing countries.

Laboratory monitoring of antiretroviral therapy helps limit resistance but is currently not feasible in developing countries. Alternative short term approaches are needed

Long-term antiretroviral treatment outcomes in seven countries in the Caribbean.

Objectives:To report long-term HIV treatment outcomes in 7 Caribbean countries. Design:Observational cohort study. Methods:We report outcomes for all antiretroviral therapy (ART) naive adult patients enrolled on ART from program inception until study closing for cohorts in Barbados, the Dominican Republic, Haiti, Jamaica, Martinique, Trinidad, and Puerto Rico. Incidence and predictors of mortality were analyzed by time-to-event approaches. Results:A total of 8203 patients were on ART from 1998 to 2008. Median follow-up time was 31 months (interquartile range: 14–50 months). The overall mortality was 13%: 6% in Martinique, 8% in Jamaica, 11% in Trinidad, 13% in Haiti, 15% in the Dominican Republic, 15% in Barbados, and 24% in Puerto Rico. Mortality was associated with male gender [hazard ratio (HR), 1.58; 95% confidence interval (CI): 1.33 to 1.87], body weight (HR, 0.85 per 10 pounds; 95% CI: 0.82 to 0.89), hemoglobin (HR, 0.84 per g/dL; 95% CI: 0.80 to 0.88), CD4 cell count (0.90 per 50 CD4 cells; 95% CI: 0.86 to 0.93), concurrent tuberculosis (HR, 1.58; 95% CI: 1.25 to 2.01) and age (HR, 1.19 per 10 years; 95% CI: 1.11 to 1.28). After controlling for these variables, mortality in Martinique, Jamaica, Trinidad, and Haiti was not significantly different. A total of 75% of patients remained alive and in care at the end of the study period. Conclusions:Long-term mortality rates vary widely across the Caribbean countries. Much of the difference can be explained by disease severity at ART initiation, nutritional status, and concurrent tuberculosis. Earlier ART initiation will be critical to improve the outcomes.

Prevalence and risk factors of STDs in rural Haiti: implications for policy and programming in resource-poor settings

The goals of the current study are to: (1) estimate the prevalence of sexually transmitted diseases (STDs) among women accessing services at a womens health clinic in rural Haiti; and (2) identify risk factors for STDs in this setting. The design is a case control study, comparing risk factors for women who demonstrated positive laboratory results for chlamydia and/or gonorrhoea to women who tested negative for both of these pathogens. The strongest risk factors for chlamydia and/or gonorrhoea were largely economic variables, with work as a domestic servant increasing the risk by four-fold. Working as a market vendor reduced a womans risk of having an STD by approximately 45%. Given that economic factors are strongly associated with STD risk in this context, one potential mechanism for reducing the risk of STDs, including HIV, would involve increasing economic opportunities for women in rural Haiti.