Utility of Pooled Urine Specimens for Detection of Chlamydia trachomatis and Neisseria gonorrhoeae in Men Attending Public Sexually Transmitted Infection Clinics in Mumbai, India, by PCR

Pooling urogenital specimens for the detection of Chlamydia trachomatis and Neisseria gonorrhoeae by nucleic acid amplification tests is an attractive alternative to individual testing. As pooling can reduce the costs of testing as well as labor, it has been advocated for use in resource-poor settings. However, it has neither been widely adopted nor evaluated for use in developing countries. We evaluated the practical use of pooling first-catch urine (FCU) specimens for the detection of C. trachomatis and N. gonorrhoeae from 690 men in Mumbai, India, by PCR. FCU, urethral smears, and swabs were collected from men seen at two sexually transmitted infection (STI) clinics. All laboratory testing was done at the Lokmanya Tilak General Hospital. Gram stain smears and culture isolation for N. gonorrhoeae were performed. Each FCU was tested individually and in pools using the Roche Amplicor PCR for C. trachomatis and N. gonorrhoeae with an internal control for inhibition. Specimen pools consisted of aliquots from five consecutively processed FCUs combined into an amplification tube. An optical density reading of ≥0.20 indicated a pool for which subsequent testing of individual samples was required. Prevalence by PCR on single specimens was 2.2% (15/690) for C. trachomatis and 5.4% (37/690) for N. gonorrhoeae. Compared to individual FCU results, pooling for C. trachomatis and N. gonorrhoeae had an overall sensitivity of 96.1% (50/52). Specificity was 96.5% (83/86) in that three pools required single testing that failed to identify a positive specimen. Pooling missed two positive specimens, decreased the inhibition rate, and saved 50.3% of reagent costs. In this resource-limited setting, the use of pooling to detect C. trachomatis and N. gonorrhoeae by PCR proved to be a simple, accurate, and cost-effective procedure compared to individual testing

Modeling the delamination of amorphous-silicon thin film anode for lithium-ion battery

Sputter-deposited amorphous silicon thin films on metallic copper current collectors are widely studied as lithium-ion anode systems. Electrochemical results indicate these electrodes exhibit near theoretical capacity for first few cycles; however delamination at the thin film-current collector interface causes rapid capacity fade leading to poor cycling performance. Primary reason for this interfacial delamination is the mechanical stress generated due to colossal volume expansion of silicon during lithiation. The focus of the current study is to present a mechanistic understanding of the role of mechanical properties of the current collector on this characteristic delamination behavior during electrochemical cycling. Toward this end, we have developed a computational framework that accounts for the coupled diffusion induced large deformation in silicon, elasto-plastic deformation of the current collector, as well as the nucleation and propagation of interfacial delamination. We have also performed a detailed parametric study to investigate the effect of mechanical properties of the current collector on the delamination of the thin film-current collector interface. We have accordingly determined that current collectors with low elastic modulus such as graphite can completely suppress interfacial delamination. Our analysis thus provides a sound mechanistic approach for designing next generation Si thin film anodes with improved capacity retention. © 2013 Elsevier B.V. All rights reserved

Enhancing financial security of female sex workers through a community-led intervention in India: Evidence from a longitudinal survey

Introduction: Community-led organizations (COs) have been an integral part of HIV prevention programs to address the socio-economic and structural vulnerabilities faced by female sex workers (FSWs). The current study examines whether strengthening of community-led organizations and community collectivization have been instrumental in reducing the financial vulnerability and empowering FSWs in terms of their self-efficacy, confidence, and individual agency in India. Data and methods: This study used a panel data of 2085 FSWs selected from 38 COs across five states of India. Two rounds of data (Round 1 in 2015 and Round 2 in 2017) were collected among FSWs. Data were collected both at CO and individual level. CO level data was used to assess the CO strength. Individual level data was used to measure financial security, community collectivization, and individual empowerment. Results: There was a significant improvement in CO strength and community collectivization from Round 1 to Round 2. High CO strength has led to improved financial security among FSWs (R2: 85% vs. R1: 51%, AOR: 2.5; 95% CI: 1.5–4.1) from Round 1 to Round 2. High collective efficacy and community ownership have improved the financial security of FSWs during the inter-survey period. Further, the improvement in financial security in the inter-survey period led to increased or sustained individual empowerment (in terms of self-confidence, self-efficacy, and individual agency) among FSWs. Conclusions: Institutional strengthening and community mobilization programs are key to address the structural issues and the decrease of financial vulnerability among FSWs. In addition, enhanced financial security is very important to sustain or improve the individual empowerment of FSWs. Further attention is needed to sustain the existing community advocacy and engagement systems to address the vulnerabilities faced by marginalized populations and build their empowerment

Men who have sex with men and transgenders in Mumbai, India: An emerging risk group for STIs and HIV

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Alcohol use by men is a risk factor for the acquisition of sexually transmitted infections and human immunodeficiency virus from female sex workers in Mumbai, India

OBJECTIVE: We investigated whether men who were under the influence of alcohol when visiting female sex workers (FSW) were at greater risk for sexually transmitted infections (STI) and human immunodeficiency virus (HIV). STUDY: A cross-sectional analysis using baseline data from a randomized controlled trial of an HIV prevention intervention for high-risk men in Mumbai, India. RESULTS: The overall HIV prevalence among 1741 men sampled was 14%; 64% had either a confirmed STI or HIV; 92% reported sex with an FSW, of whom 66% reported having sex while under the influence of alcohol (SUI). SUI was associated with unprotected sex (odds ratio [OR]: 3.1; 95% confidence interval [CI], 2.3–4.1), anal sex (OR: 1.5; 1.1–2.0), and more than10 FSW partners (OR: 2.2; 1.8–2.7). SUI was independently associated with having either an STI or HIV (OR: 1.5; 1.2–1.9). CONCLUSION: Men who drink alcohol when visiting FSWs engage in riskier behavior and are more likely to have HIV and STIs. Prevention programs in India need to raise awareness of this relationship

Engaging with the private healthcare sector for the control of tuberculosis in India: cost and cost-effectiveness

Background The control of tuberculosis (TB) in India is complicated by the presence of a large, disorganised private sector where most patients first seek care. Following pilots in Mumbai and Patna (two major cities in India), an initiative known as the ‘Public–Private Interface Agency’ (PPIA) is now being expanded across the country. We aimed to estimate the cost-effectiveness of scaling up PPIA operations, in line with India’s National Strategic Plan for TB control.Methods Focusing on Mumbai and Patna, we collected cost data from implementing organisations in both cities and combined this data with models of TB transmission dynamics. Estimating the cost per disability adjusted life years (DALY) averted between 2014 (the start of PPIA scale-up) and 2025, we assessed cost-effectiveness using two willingness-to-pay approaches: a WHO-CHOICE threshold based on per-capita economic productivity, and a more stringent threshold incorporating opportunity costs in the health system.Findings A PPIA scaled up to ultimately reach 50% of privately treated TB patients in Mumbai and Patna would cost, respectively, US$228 (95$564 (95% uncertainty interval (UI): 409 to 775) per DALY averted. In Mumbai, the PPIA would be cost-effective relative to all thresholds considered. In Patna, if focusing on adherence support, rather than on improved diagnosis, the PPIA would be cost-effective relative to all thresholds considered. These differences between sites arise from variations in the burden of drug resistance: among the services of a PPIA, improved diagnosis (including rapid tests with genotypic drug sensitivity testing) has greatest value in settings such as Mumbai, with a high burden of drug-resistant TB.Conclusions To accelerate decline in TB incidence, it is critical first to engage effectively with the private sector in India. Mechanisms such as the PPIA offer cost-effective ways of doing so, particularly when tailored to local settings

How the Avahan HIV prevention program transitioned from the Gates Foundation to the government of India.

Developing countries face diminishing development aid and time-limited donor commitments that challenge the long-term sustainability of donor-funded programs to improve the health of local populations. Increasing country ownership of the programs is one solution. Transitioning managerial and financial responsibility for donor-funded programs to governments and local stakeholders represents a highly advanced form of country ownership, but there are few successful examples among large-scale programs. We present a transition framework and describe how it was used to transfer the Bill & Melinda Gates Foundation's HIV/AIDS prevention program, the Avahan program, to the Government of India. Essential features recommended for the transition of donor-funded programs to governments include early planning with the government, aligning donor program components with government structures and funding models prior to transition, building government capacity through active technical and management support, budgeting for adequate support during and after the transition, and dividing the transition into phases to allow time for adjustments and corrections. The transition of programs to governments is an important sustainability strategy for efforts to scale up HIV prevention programs to reach the populations most at risk